|
Key to the genera of Tachinidae in the eastern US Second page of the Tachinid key. See page one for information and initial key points. Eastern species list. |
|
66. Katepisternum with three bristles. Fronto-orbital plate with a few irregularly arranged bristles lateral to frontal row, some more than two-thirds length of longest frontal bristles; female with only one proclinate orbital bristle; those behind it lateroclinate or reclinate
Ceromasia Rondani (1/2) auricaudata Townsend
66. Katepisternum with four bristles. Fronto-orbital plate without bristles but with fine hairs lateral to frontal row (some small bristles less than half length of longest frontal bristle in Zizyphomyia limata (Coquillett)); female with two proclinate orbital bristles 67
67. Palpus flattened dorsoventrally; setae on its dorsomedial surface short, stout, rather appressed
Euceromasia Townsend (3/5)
67. Palpus cylindrical; setae on dorsomedial surface longer and more erect
68
68. Male with only one anterodorsal bristle on mid tibia and with patch of dense appressed hairs on ventral surface of abdominal tergite 4. Female with pointed, uniformly gray pruinescent abdomen
Townsendiellomyia Baranov (1/1) nidicola Townsend
68. Male with two or more anterodorsal bristles on mid tibia and either without a patch of dense appressed hairs on abdomen or with extensive patches covering all of abdominal tergites 4 and 5 except for a middorsal longitudinal bare stripe. Female abdomen more rounded apically, with a basal pruinescent band on each tergite contrasting with dark apex
Zizyphomyia Townsend (2/3)
69. Scutellum with three pairs of bristles; the lateral bristles longest, straight and divergent, arising about midway between the basal and apical bristles; apical bristles crossed
70
69. Scutellum with usually four pairs of bristles, with the lateral bristles arising more proximally between the basal and subapical bristles (left below); if three pairs present (right below), then the lateral bristles are shorter than the apical bristles
72
70. Parafacial with vertical row of long stout erect bristles
P. affinis
Paradidyma B. & B., in part (11/16)
70. Parafacial bare
71
71. Eye covered with conspicuous dense hairs; each hair longer than combined diameter of four or more eye facets; facial ridge with long erect bristles on lower half or more
Neomintho B. & B. (2/2)
71. Eye bare; facial ridge with fine decumbent setae on lower half or less. First flagellomere with conically pointed apex; second aristomere minute
Ceracia Rondani (1/1) dentata Coquillett
72. Ventral proepimeral bristle directed anteroventrally (below). Base of R4+5 with a single large bristle (rarely with a smaller additional bristle); M ending at apex of wing. Katepimeron usually with a single seta
P. tarsalis
Phytomyptera Rondani (16/23)
72. If ventral proepimeral bristle directed anteroventrally and M ending at apex of wing (some Chaetostigmoptera), then base of R4+5 with several short bristles and katepimeron bare
73
73. At most only one frontal bristle arising below upper margin of pedicel; pedicel with one or two long slender curved setae more than half as long as length of plumose arista; male with all frontal bristles proclinate. M terminating in R4+5 well before wing margin, with a long extension beyond bend
M. sinuata
Microchaetina Wulp, in part (2/8)
73. Frontal bristles usually descending below upper margin of pedicel, but if not, then either pedicel without such long bristles or arista bare; male usually with some reclinate frontal bristles. M with at most a short extension, usually terminating in or near wing margin
74
74. Anepimeron with an exceptionally long bristle extending posteriorly beyond middle of lower calypter. Anterior and posterior lappets of posterior thoracic spiracle about equal in size; each a fringe of plumose hairs, enclosing a narrow V-shaped opening at or near middle of spiracle
75
74. Anepimeron with shorter bristles not extending to middle of lower calypter or with none at all. Anterior and posterior lappets of posterior thoracic spiracle unequal; the posterior one larger, forming a crescent-shaped opening with anterior lappet
77
75. Dorsal surface of lower calypter, except for a narrow band along posterior margin, covered with long erect hairs
H. abrupta
Hystricia Macquart, in part (1/2) abrupta Wiedemann
75. Dorsal surface of lower calypter without long erect hairs
76
76. Abdomen with tesselated pattern of pruinescence
Lypha R-D., in part (5/6)
76. Abdomen shining black, usually with metallic greenish luster, each tergite without basal transverse pruinescent bands
Lydina R-D. (2/2)
77. Lower calypter with a few pale recumbent hairs dorsally along outer margin
Xanthophyto Townsend, in part (2/2)
77. Lower calypter bare dorsally, fringed only along margin
78
78. Bend of M a right angle; the portion beyond bend sinuous, curving toward apex. An extra smaller bristle usually present between second and third postsutural supra-alar bristles (closeup below)
79
78. Bend of M obtuse; the portion beyond bend straight or convex. No extra small bristle usually present between second and third postsutural supra-alar bristles
79. Eye covered with conspicuous dense hairs
80
79. Eye apparently bare
E. lavarum 83
80. Facial ridge with row of erect, widely and evenly spaced, stout bristles, usually on lower two-thirds or more
C. tachinomoides 81
80. Facial ridge with small decumbent irregularly and more closely spaced setae, usually on lower half or more
82
81. Lower facial margin not protruding, not visible in profile. Wing membrane flat at bend of M, not appearing as a continuation of M
Austrophorocera Townsend (8/10)
81. Lower facial margin protruding below vibrissal angle, visible in profile (see image at 80). Wing membrane creased for a short distance distal to bend of M, appearing from above as a stub or continuation of M
Chetogena Rondani (10/16 in 3 subgenera)
82. Lower facial margin not visible in profile
Phorocera R-D. (7/8)
82. Lower facial margin protruding beyond vibrissal angle, visible in profile (see second image at 79, and image at 80)
83
83. Facial ridge with row of stout erect bristles (see image at 80 above) 84
83. Facial ridge with shorter decumbent bristles (see second image at 79) 85
84. Scutellum lacking apical bristles
Bessa R-D. (2/2)
84. Scutellum with crossed apical bristles
Gueriniopsis Reinhard (1/1) setipes Coquillett
85. Frontal bristles descending to level of middle of facial ridge (see second image at 79)
Exorista Meigen (3/6 in 2 subgenera)
85. Frontal bristles ending before reaching level of middle of facial ridge
86
86. Cerci of male spatulate in posterior view, broadest beyond middle. Sternite 7 of female with reflexed triangular piercer
P. webberi (male) Phorocera R-D., in part (7/8)
86. Cerci of male slender, curved anteriorly, in posterior view broadest at base. Sternite 7 of female unmodified
Tachinomyia Townsend (9/10)
87. Apical scutellar bristles among the longest bristles on the scutellum, at least as long as lateral scutellar bristles, arising close to midline, and crossing each other near their midlength
G. dorsalis
Graphogaster Rondani (4/13)
87. Apical scutellar bristles much shorter than sublateral or lateral bristles
88
88. Subapical scutellar bristles divergent (sbap sctl s below)
89
88. Subapical scutellar bristles convergent (sbap sctl s below)
89. Middorsal depression on abdominal syntergite 1+2 extending back to hind margin of syntergite
90
89. Middorsal depression on abdominal syntergite 1+2 not extending back to hind margin of syntergite
93
90. Eye haired and facial ridge with bristles on lower two-thirds or more; ocellar bristles usually absent
Compsilura Bouche’, in part (1/1) concinnata Meigen
90. Eye apparently bare, with hairs sparse and inconspicuous, if present; facial ridge usually without setae except on lowest fourth; ocellar bristles present, usually well-developed
91
91. Parafacial with decumbent hair on lower third to half, usually not extending up as high as lowest frontal bristle. Parasites of sawfly larvae
V. hylotomae
Vibrissina Rondani, in part (7/11)
91. Parafacial bare, except for a few hairs just below lowest frontal bristle. Parasites of larvae of Lepidoptera and larvae or adults of Coleoptera
92
92. Mid tibia with one anterodorsal bristle (a second, small bristle arising proximal to it)
Eucelatoria Townsend, in part (7/11)
92. Mid tibia with at least three well-developed bristles, namely one or two small bristles above and one small one below largest bristle
Blondelia R-D. (4/6)
93. Eye covered with conspicuous dense hairs; each hair longer than combined diameter of four or more eye facets
94
93. Eye apparently bare
94. Proepisternum setose
Meigenia R-D. (1/1) submissa Aldrich and Webber
94. Proepisternum bare
95
95. Parafacial with hairs or bristles below lowest frontal bristle
I. aldrichi 96
95. Parafacial bare
97
96. Facial ridge bristled on lower two-thirds or more; parafacial with small decumbent setae below lowest frontal bristle (see image at 95)
Istocheta Rondani (1/1) aldrichi Mesnil
96. Facial ridge bare or nearly so; parafacial with row or patch of long erect bristles
E. comstocki
Eulasiona Townsend (6/8)
97. R4+5 setose nearly to crossvein r-m
Thelairodoria Townsend (1/1) setinervis Coquillett
97. R4+5 setose less than halfway to crossvein r-m
98
98. Male without proclinate orbital bristles. Female abdomen carinate midventrally and with sternite 7 modified into hook-like piercer
99
98. Male with proclinate orbital bristles. Female abdomen with a tubular or transversely flattened ovipositor
100
99. Facial ridge bristled on lower half or more (see image at 93)
Compsilura Bouche’, in part (1/1) concinnata Meigen
99. Facial ridge bare except on lower fourth or less
Eucelatoria Townsend, in part (7/11)
100. Body dark brown or black in ground color
Myiopharus B. & B., in part (11/14)
100. Body pale orange or yellow in ground color
Angustia Sellers (2/3)
101. Subvibrissal ridge with a row of four or more well-developed bristles; this ridge longer than row of supravibrissal setae on facial ridge
102
101. Subvibrissal ridge with at most three large bristles arranged in a row shorter than the row of setae above vibrissa
104
102. Ptinal sulcus extending posteriorly below genal dilation to level of hind margin of eye; genal dilation somewhat triangular. Abdominal syntergite 1+2 with more than one pair of median marginal bristles. Upper part of frons of female with lateroclinate upper orbital bristle arising outside of frontal row. Postpronotum with three basal bristles
Pelatachina Meade (2/3)
102. Ptinal sulcus ending below vibrissa at level of front margin of eye; genal dilation scarcely developed (see image at 101). Abdominal syntergite 1+2 with only one pair of median marginal bristles. Frons of female lacking a lateroclinate bristle. Postpronotum usually with only two large basal bristles, namely the outer and middle basal bristles; inner bristle usually hair-like
103
103. Parafacial with hairs, at least on upper two-thirds or more (hairs sometimes pale, concolorous with parafacial and thus visible only against a dark background)
C. theutis
Cryptomeigenia B. & B. (12/14)
103. Parafacial bare, or with a few hairs on upper third below lowest frontal bristle
Zaira R-D. (7/14)
104. Male with two pairs of slender proclinate orbital bristles crowded against frontal bristles on narrow frons. Sternite 5 of male usually with pair of tufts of curved setae. Female with broad ovipositor, flattened dorsoventrally; sternite 7 truncate or obtusely pointed; midventral margins of some abdominal tergites with paired patches of thorn-like bristles. Posteroapical margin of hind coxa with similar bristles
M. barbata
Medina R-D. (3/4)
104. Male with much broader frons, with or without proclinate orbital bristles. Sternite 5 of male without tufts of curved setae. Female with tubular ovipositor or with saber-like piercer 105
105. Eye almost as high as head; gena in lateral view reduced to a narrow setose strip less than one-tenth height of head
106
105. Eye height much less than head height; gena at least one-sixth height of head 107
106. Ocellar setae arising beside or in front of anterior ocellus; fronto-orbital plate with row of four or more proclinate orbital bristles
E. genalis
Euhalidaya Walton (1/1) genalis Coquillett
106. Ocellar setae arising behind anterior ocellus; fronto-orbital plate with two or three proclinate orbital bristles
Sphaerina Wulp (1/1) linearis Townsend
107. Facial ridge setose on lower half or more
108
107. Facial ridge bare except on lowest one third or less
108. Scape, pedicel, and first flagellomere bright orange; arista of male usually thickened to apex. Facial ridge prominent in lateral view, appearing as a band anterior to parafacial, and usually adorned with small scattered setae on lower half or more. Parasite of the walkingstick
Phasmophaga Townsend, in part (3/4)
108. Antenna usually black (partially orange in Admontia nasoni Coquillett, with row or small bristles on parafacial); arista hair-like on apical third or more. Facial ridge usually not prominent in lateral view except for that portion just above vibrissa. Not a parasite of walkingstick
109
109. Parafacial with a patch of small setae adjacent to ptinal suture and usually continuous with small setae outside lower frontal bristles; setae usually extending ventrally at least to a level opposite uppermost bristles on facial ridge
A. degeerioides
Admontia B. & B. (8/13)
109. Parafacial without setae below lowest frontal bristle
110
110. Base of R4+5 with a single long seta, usually as long as a third or more the distance to crossvein r-m. Parafacial narrow and parallel-sided. Sternite 7 of female forming an enormous sickle-shaped piercer, opposing a seta-studded peg-like extension of ventral margin of syntergite 1+2
C. diabroticae
Celatoria Coquillett (2/2)
110. Base of R4+5 usually with two or more shorter seta. Parafacial, if narrow, not parallel-sided, instead tapering ventrally. Piercer, if present (as in Chaetonodexodes), inconspicuous, often concealed between ventral margins of tergites
111
111. Discal bristles absent on abdominal tergite 3. Median marginal bristles on tergite 3 arising rather far forward, halfway between middle and hind margin of tergite. Female with small hooked piercer
Chaetonodexodes Townsend, in part (1/1) vanderwulpi Townsend
111. Discal bristles present on abdominal tergite 3. Median marginal bristles on tergite 3 arising closer to hind margin of tergite than to middle. Female without piercer
112
112. Setae on facial ridge decreasing markedly in length and thickness dorsally, becoming hair-like above lower fourth
E. exilis
Eribella Mesnil (2/2)
112. Setae on facial ridge decreasing only slightly in length and thickness dorsally, retaining their bristle-like appearance nearly to the uppermost seta
A. aldrichi
113
113. Katepisternum with two bristles. Male with only one stout proclinate upper orbital bristle (see image above)
Anoxynops Townsend (1/1) aldrichi Curran
113. Katepisternum with three bristles. Male with or without two proclinate upper orbital bristles
M. doryphorae
114
114. Middle katepisternal bristle arising close to anterior bristle, three times farther from posterior katepisternal as from anterior katepisternal (and see face above)
Myiopharus B. & B. (11/14)
114. Middle katepisternal bristle about equidistant between anterior bristle and posterior katepisternal bristles
Oxynops Townsend (1/1) anthracinus Bigot
115. Lateral scutellar bristle absent
Phyllophilopsis Townsend (2/2)
115. Lateral scutellar bristle present
116
116. Discal bristles absent on abdominal tergites 3 and 4
117
116. Discal bristles present on abdominal tergites 3 and 4
118
117. M and R4+5 each ending separately rather far apart on either side of wing apex or M ending in membrane at point where bend should be, as in C. manca (Greene)
C. crassinervis
Chaetostigmoptera Townsend (3/3) (includes Paracraspedothrix) (1/1) angulicornis Curran
117. M and R4+5 each ending anterior to wing apex
Myiopharus B. & B. (11/14)
118. Parafacial with setae extending from lowest frontal at least to middle of parafacial
119
118. Parafacial bare except for an occasional hair just below lowest frontal bristle
120
119. Parafacial with a row of rather regularly arranged erect bristles. Median marginal bristles on abdominal tergites 3 and 4 arising nearer middle than posterior margin of tergite
E. comstocki
Eulasiona Townsend, in part (6/8)
119. Parafacial with scattered setae. Median marginal bristles arising nearer posterior margin than middle of tergites 3 and 4. M ending in wing margin
Lixophaga Townsend (12/16)
120. Postpronotum with two bristles, or with three arranged in a nearly straight row
121
120. Postpronotum with at least three bristles, arranged in a triangle
122
121. Both sexes with three upper orbital bristles, two of which are proclinate and the posteriormost one lateroclinate. Parafacial very wide; eye small and rounded. Sternite 7 of female folded longitudinally
P. derisa
Picconia R-D. (1/1) derisa Reinhard
121. Neither sex with a lateroclinate upper orbital bristle. Parafacial narrower; eye more elliptic. Sternite 7 of female simple, unfolded
Anisia Wulp, in part (4/4)
122. Proepisternum with a small patch of hairs
Prodegeeria B. & B. (2/3)
122. Proepisternum bare (a single hair may rarely be present in Belida)
123
123. Abdominal tergites 3 and 4 each with two or more pairs of discal bristles; the median pair arising at most slightly anterior to lateral ones
124
123. If abdominal tergites 3 and 4 with two pairs of discal bristles, then one pair decidedly anterior to the other pair (Fig. 239)
125
124. Mid tibia with two anterodorsal bristles
Oswaldia R-D. (8/8)
124. Mid tibia with one anterodorsal bristle
Opsomeigenia Townsend, in part (2/2) (includes Euthelyconychia) (3/4)
125. Lateral scutellar bristles as long and straight as subapical scutellar bristles; prosternum with white hairs. Abdomen of female with well-developed midventral carina; ventral margin or tergite 4 with short stout bristles
E. leucophaeata
Eucelatoria Townsend (7/11)
125. Lateral scutellar bristles two-thirds as long as subapical bristles; prosternum with black hairs. Abdomen of female with well-developed midventral carina only in some species of Vibrissina, in which margins of both tergites 3 and 4 are armed with stout bristles
126
126. Postpronotum with four bristles arranged in a parallelogram, with the middle basal one displaced anteriorly
Belida R-D. (3/3)
126. Postpronotum usually with three bristles, but if with four, then the three basal bristles arranged in a straight line
127
127. Parafacial strongly narrowed ventrally. Abdomen of female strongly bent ventrally, with a telescopic tubular ovipositor directed ventrally
T. verticalis
Trigonospila Pokorny, in part (3/3)
127. Parafacial not as strongly narrowed ventrally. Ovipositor, if telescopic, not directed ventrally
128
128. Katepisternum with two bristles. Abdomen of female with midventral carina; sternite 7 modified into a hook-like piercer (shorter than image to right below)
Vibrissina Rondani, in part (7/11)
128. Katepisternum with three bristles. Abdomen of female with neither midventral carina nor piercer
129
129. Scutum with three pairs of presutural acrostichal bristles. Sternite 5 of male with a single long bristle (as below); sternites 5 and 6 of female rounded or truncate apically
Lixophaga Townsend (12/16)
129. Scutum with only two pairs of presutural acrostichal bristles, the anterior two pairs present, the posteriormost pair absent. Sternite 5 of male lacking a long bristle; sternites 5 and 6 of female large, heavily sclerotized, pointed apically (as below)
Calolydella Townsend (1/1) lathami Curran
130. A1 ending in wing margin. Lower katepisternal bristle usually larger than anterodorsal katepisternal bristle
Siphona Meigen (10/27 in 6 subgenera)
130. A1 ending in membrane, before reaching margin. Lower katepisternal bristle usually smaller than anterodorsal katepisternal bristle
|
