140 KANSAS UNIVERSITY SCIENCE BULLETIN. 



9. A more or less distinct swelling or fold along the inner eye margins; 

 posterior ocelli placed obliquely, elongate and curved poste- 

 riorly; pygidium of ^ well defined, its apical portion rather 

 sparsely pubescent; insects never densely pilose Larropsis 



No swelling along the inner eye margins; pygidium of / and o 



entirely naked to densely clothed with pubescence 10 



10. Posterior ocelli very elongate, anteriorly almost longitudinal in 

 position, their posterior end curved into a hook or flat spiral 

 pygidium covered with bristles or pubescence (usually metallic), 

 that of 2 always well defined; fore tarsal comb of j com- 

 posed of short spines; insects often bee-like Tachytes 



Posterior ocelli reniform or oblong; pygidium of o usually well 

 defined and naked; fore tarsal comb of o with long flexible 

 spines; insects never densely pubescent nor bee-like, Tachysphex. 



The genus Miscophinus, which is inserted in the above key, 

 has not as yet been reported from Kansas, though it is prob- 

 able that it occurs in the state. 



Order of treatment : Larra, Notogonia, Larropsis, Tachytes, 

 Tachysphex, Lyroda, Plenoculus, Niteliopsis, Miscovhus, and 

 Bothynostethus. 



Larra Fab. 



Fab.; Ent. Syst. t. II, p. 220; 1793. 

 Syn. Larrada Sm. 1856. 



Form rather stout, sparsely pubescent. Head wider than thorax, with 

 a longitudinal fold along the inner eye margin, and somewhat angulate 

 and depressed above; antennae rather stout, usually in a distinctly 

 elbowed position, each rather long scape fitting into a longitudinal facial 

 impression; anterior ocellus small and round, in a depression which forms 

 an obtuse angle with the rest of the face; posterior ocelli indistinct, oval 

 and transverse, situated on the posterior edge of a transverse fold from 

 eye to eye; mandibles emarginate beneath, in our species indistinctly 

 dentate within. Thorax long; pronotum not angled into the mesonotum, 

 and not or very slightly depressed below the level of the latter; pro- 

 podeum long, truncate posteriorly; marginal cell of the fore wings 

 truncate and wdth an evident appendiculation ; legs stout and spinose. 

 Abdomen slightly depressed. 



o . Pygidium well defined, shining, naked except for a very few 

 hairs along the marginal furrow; comb of fore tarsi not well defined. 



J . More pilose than the g ; pygidial area margined;, fore femora 

 entire beneath at the base; eighth ventral segment with a shallow emar- 

 gination. 



Larra analis Fab. 



(Fig. 16, wings; 24, mandible; 107, pygidium, 5) .) 

 Larra analis Fab.; Syst. Piez., 1804, p. 220. j . 

 Larra analis Fox; Proc. Acad. Nat. Sci. Phil., 481-482; 1893. 5 . 



