WESTERN QUARTERLY REPORTER. 165 



of the wings ; feet yellow, black at base ; wings tinged with fer- 

 ruginous ; abdomen segments with yellow posterior margins in- 

 terrupted on the middle of the venter, the anterior one not ex- 

 tending beneath ; anterior segment abruptly rather smaller than 

 the second one ; aculeus naked, exerted, inflexible, recurved. 

 My specimens are males. It inhabits Missouri as well as 

 Pennsylvania, and is not uncommon. Probably it is allied to 

 Elis sexcincta Fab. 



POMPILUS Fabr., Latr., Jur. 

 P. FORMOSUS. [Ante, p. 91.] 



AMPULEX Jur. 



4- CANALICULATA. — ^Black ; superior wings with a blackish 

 band ; antennae and feet piceous. 



Inhabits Missouri. 



Mandibles at tip and labrum rufous ; front with a carina above 

 each of the antennae and another in the middle which descends 

 upon the hypostoma; collar densely punctured and grooved in 

 the middle; thorax sparsely punctured and with two distant 

 longitudinal impressed lines; metathorax with eight dilated 

 grooves, in which are numerous transverse elevated lines ; wings 

 brownish, superiores with a blackish band and black stigma ; ab- 

 domen polished immaculate. 



Length nearly two-fifths of an inch. 



These insects have a singular appearance in consequence of 

 their elongated collar and metathorax. The species resembles 

 the Fasciatus Jur., but differs in the number of grooves on the 

 metathorax. 



STIZUS Latr., Jur. [77] 



1. S. GRANDis. [Ante, page 3.] 



2. S. UNiciNCTUS. [Ante, p. 4.] 



LARRA Fabr., Latr. 



1. L. ABDOMiNALis. — Black ; thorax with cinereous down ; ab- 

 domen, first, second and third segments, rufous ; feet black. 

 Inhabits Arkansa. 

 Body black ; front argenteous ; thorax with cinereous down ; 



