Tribe Larrini


1  Frons just below midocellus with a transverse swelling extending eye to eye (interrupted medially) and joining a linear swelling along inner orbit to form an M or inverted U; midocellus in a broad depression

 

2

 

1 Frons variable but without swellings as above; midocellus not in a broad depression

 

3

 

Female: last tarsomere evenly arcuate in lateral view, sides diverging most of way to apex (dorsal view), ventral surface without hairmat; claw not prehensile and without an inner tooth; outer surface of foretibia with a row of three or more stout bristles

 

 

 

    Male: propodeal side densely punctate, shiny; apical half of outer surface of foretibia usually with one or more erect bristles; mandible without inner teeth

 

Larra

 

Female: last tarsomere angled in lateral view, sides parallel on apical half; ventral surface usually with dense hairmat; claw prehensile (often folded against last tarsomere); outer surface of foretibia at most with one preapical bristle

 

 

 

     Male: propodeal side dull and impunctate; outer surface of foretibia without bristles; mandible often with one or two inner teeth

Liris

 

3  Ocellar scars very long, golf club or comma shaped, long axes of scars subparallel, not exceeding an angle of 70 degrees; pygidial plate present in both sexes and usually clothed with dense setae

 

 

Tachytes

 

3 Ocellar scars oval or oblong, or if elongate then long axes of scars forming and angle of 80 degrees or more; pygidial plate usually present in females but bare or sparsely setose, male usually without a pygidial plate

 

 

4

 

4  Female foretarsomere II with three or more rake spines which are long and fine; male sternum VIII emarginated apically (bispinose)

 

 

Tachysphex

 

4 Female foretarsomere II with no more than two rake spines which are usually bladelike or thornlike; male sternum VIII rounded apically

 

5

 

5  Subalar fossa bordered below by a sharp longitudinal carina; least interocular distance greater than combined length of pedicel and flagellomere I

 

Larropsis

 

5 Subalar fossa not bordered below by a sharp carina; least interocular distance usually equal to or less than combined length of pedicel and flagellomere I

 

 

Subgenus Ancistromma of Larropsis

Species L. distincta

 

 

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