Tribe Pompilini

(This represents only a portion of the Pompilidae in North America. The other tribe Aporini I don't have a key for at this time.)

Characters for the tribe:


Pronotum rarely slightly longer than the mesonotum, usually distinctly shorter, its posterior margin angulate, arcuate, or sometimes nearly straight; pronotal collar in the female always depressed, on a much lower plane than the vertex or the thoracic dorsum; fore wing with three submarginal cells, or if two, the propodeum is produced postero-laterally into sharp, conical processes; scape rarely slightly compressed, the front without distinct antennal scrobes; propodeum of variable shape, but never with the postero-lateral angles produced backward as vertical ridges; antennae of males variable.


Propodeum not produced postero-laterally into sharp conical processes; legs more or less spinose; postnotum a transverse band of variable width, never broadly concealed dorsally





1 Propodeum bearing sharp, conical processes postero-laterally; basal hooklets of male genitalia wanting; either (a) the legs smooth and almost devoid of spines, or (b) the postnotum concealed dorsally, the metanotum and propodeum in broad contact





Anal vein of hind wing straight, paralleling the preaxillary furrow for its entire length, the transverse median vein leaving it at an angle; cubitus of hind wing extending beyond the transverse cubital vein only a short stub; posterior rim of propodeum virtually absent, represented merely by a narrow ridge




2 Anal and transverse median veins of hind wing confluent and forming an arch; cubitus of hind wing extending considerably beyond the transverse cubital vein; posterior rim of propodeum well developed




Anal lobe of wing very large, about three-fourths the length of the submedian cell; spines beneath the apical tarsal segments of the female in an irregular double row; males very densely hairy, even on the abdominal dorsum





3 Anal lobe smaller, at most a little over half the length of the submedian cell; spines beneath the apical tarsal segments, when present, in a single median row (occasionally also with one or two lateral spines); males never as densely hairy, the abdominal dorsum not at all hairy





4 Malar space well developed, about as long as, or longer than, the antennal pedicel; labrum fully exposed; claws bifid in both sexes; antennae of male beyond third segment subserrate; hypopygium of female strongly compressed, hirsute





4 Malar space shorter than the pedicel, usually very short or practically absent; antennae of males slender, at most with very feeble serrations on the apical few segments; hypopygium of female at most moderately compressed




Anal vein of hind wing meeting the media beyond the origin of the cubitus, except occasionally in Episyron, which has a scale-like pubescence on the first abdominal tergite; postnotum considerably arcuately broadened on each side between the median line and a point just above the spiracles, where it is constricted






5 Anal vein of hind wing meeting the media before or at the origin of the cubitus, or sometimes a little beyond, in which case the postnotum is very short, transversely linear; in any case the postnotum is not as above, but with nearly parallel margins; never with scale-like pubescence




Apical tarsal segments without spines beneath; all the claws of both sexes dentate; wings very long, never folded longitudinally in repose; body without scale-like pubescence





6 Female: apical tarsal segments with a row of spines beneath. Male: claws bifid




First abdominal tergite, and more or less of the propodeum and parts of the thorax, with appressed , scale-like pubescence; claws of both sexes bifid





7 Without such scale-like pubescence; at least the middle and hind claws of the female dentate; eyes of female strongly converging above





Front with a distinct blunt tubercle between and slightly above the antennal orbits, present in both sexes but less pronounced in the male; pronotum with a slight median impression; mostly ferruginous species





8 Front without such a tubercle; frontal elevation of male, if present, ill-defined and sloping gradually to the face below; Nearctic species never mostly ferruginous




Female: pygidium with numerous setae, at least a few of which are stout, brittle, and bristly, directed caudad; pulvillar comb strong, of from 12 to 26 subparallel setulae. Male: claws bifid





9 Female: pygidium with a few slender, flexible setae or none at all, never with bristles. Male: claws of middle and hind legs, at least, dentate




10  Antenna relatively short and thick, the third segment in the female not more than 2.8 times as long as its greatest thickness, and never equal to more than six-tenths the upper interlocular distance, the vertex always being very broad; third segment in the male more than twice as long as thich; pulvillar comb of not more than seven weak setulae







10 Antennae more elongate, the third segment in the female at least three times as long as thick, and usually equal to more than six-tenths the upper interlocular distance; third segment in the male more than twice as long as thick; if the pulvillar comb is greatly reduced (in the female) the antennae are very long and slender




11  Subdiscoidal vein of the fore wing reaching the wing margin or nearly so, the second recurrent vein arising more than half-way out on it; pulvillar comb of not more than seven weak setulae; species of delicate build and very slender appendages






11 Subdiscoidal vein not reaching the wing margin; second recurrent vein arising half-way or less of the distance from the base of the subdiscoidal vein to the wing margin




12  Legs spinose, the female with a tarsal comb; postnotum concealed dorsally, the metanotum and propodeum in broad contact; fore wing frequently with only two submarginal cells; head not notably concave behind





12 Apex of sternum I not reaching base of II; sternum usually bent downward or straight





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