142 KANSAS UNIVERSITY SCIENCE BULLETIN. 



moderate; propodeum somewhat truncate posteriorly; marginal cell more 

 or less truncate, with an appendiculation. Pygidial area at least partly 

 pilose. 



o . Comb of fore tarsi of stout thorns, perhaps a little longer than in 

 Tachytes; pygidial area with the borders well defined, covered with 

 sparse pubescence for its apical half or two-thirds. 



g . Fore femora emarginate near the base beneath, the inner border 

 of this emargination forming a distinct tooth, more acute than in the 

 other genera having this emargination; pygidial aiea without raised 

 borders, sparsely putescent; eighth ventral segment of the abdomen 

 rounded out, in a few species very shallowly emarginate. 



This genus is represented in our state by twelve species. These in- 

 sects are seldom seen. They are sometimes taken about the burrows of 

 animals. 



Key to the Species of Larropsis. 

 Females. 



1. Interocular space at vertex less than or about equal to the length 



of antennal joints 2 and 3 united, and about equal to one-third 



the interocular space at the base of the clypeus 2 



Interocular space at verte.x distinctly wider than the length of 

 antennal joints 2 and 3, and two-thirds to three-fourths the 

 interocular space at the base of the clypeus 3 



2. Disc of propodeum with delicate striae which diverge from beyond 



the base ; wings nearly clear distincta 



Disc of propodeum granulate or with very indistinctly diverging 

 striae; wings smoky aurantia 



3. Antenna long and setaceous, longer than head and thorax (except 



in divisa, where they are about equal to head and thorax) ; 

 fourth antennal joint three to four times as long as its middle 



diameter 4 



Antennae shorter and stouter, shorter than head and thorax; fourth 

 antennal joint about two times as long as its middle diameter. . 6 



4. Pygidium well polished, sparsely large punctate, almost naked ; form 



slender; abdomen black and red; wings light smoky. . . .conferta 

 Pygidium rough, rather densely punctate, pubescent; foi-m stouter, 

 with dark, fuscous wings 5 



5. Antennae longer than head and thorax; second abdominal segment 



reddish ; tarsi black or nearly so rugosa 



Antennae about as long as head and thorax; abdomen varying from 

 red and black to red; tarsi testaceous divisa 



6. Wings smoky; insect black; ocellar space very closely punc- 



tate vegef aides 



Wings pale yellowish hyaline; most of the thorax, and the abdomen 

 entirely, pale brownish red; ocellar space rather sparsely punc- 

 tate chilopsidis 



