CLARENCE E. MICKEL 421 



Mimesa cressoni Packard 



1867. Mimesa cressonii Packard, Proc. Ent. Soc. Phila., vi, p. 405. 

 1898. Psen cressonii Fox, Trans. Anier. Ent. Soc, xxv, p. 12. 

 1908. Mimesa conica H. S. Smith, Univ. Nebr. Studies, viii, p. 389. 



Specimens examined: 27 9, 59 d"; collected at Lincoln, Fair- 

 mont, West Point, Broken Bow, Oxford, Haigler, Imperial, 

 Ogallala, Brown County, Mitchell, Glen, Harrison, Monroe 

 Canyon and Warbonnct Canyon, Nebraska; visits flowers of 

 Helimithus sp., and Gutierrezia sarothrae; taken from June 10 to 

 October. 



Smith's type and paratypcs of conica are all males of cressoni. 

 They are not females as stated in his paper. His group of gran- 

 ulosus and conica was founded on what he described as females of 

 these two species; inasmuch as all of his specimens of both species 

 were males the grouping, of course, has no systematic value. 



Family CRABRONIDAE 

 Thyreopus fBlepharipus) utensis sp. nov. 



9 . Length 7 mm. Cb'peus feebly carinate medially; anterior margin of 

 produced portion of clypeus truncate; frontal depression shallow, glabrous, 

 the impressed Hne running to the fore ocellus deep; vertex, occiput and cheeks 

 sparsely, microscopically punctate; ocelli in an equilateral triangle, the space 

 between the two posterior ocelh distinctly less than the space between them 

 and the nearest eye margins; first joint of flagellum distinctly longer than the 

 second; pronotum apparently impunctate, deeply, transversely impressed 

 before the apical margin, slightly, longitudinally impressed medially; mesoscu- 

 tum, episterna and mesoscutellum very finely, sparsely punctate; episterimm 

 with a short carina which originates at the coxal cavityand terminates ina small 

 sharp tubercle; impressed Hncs forming enclosed space of propodeuni indis- 

 tinct, not foveolate; medial furrow shallow, moderately wide, running the 

 entire length of the propodeum; enclosed space with four very strong striae on 

 each side of the medial furrow; sides of propodeum for the most part glabrous, 

 indistinctly striate posteriorly; posterior face of propodeum transversely 

 rugose, stronger on the apical portion; lateral ridges of posterior face distinct; 

 first two abdominal segments almost impunctate, the remaining segments 

 distinctly, microscopically punctate; pygidium narrowed at the apex, deeply 

 excavated; wings slightly fuscous; first transverse cubitus received distinctly 

 before the middle of the marginal cell. Entirely black; tcgulae dark l)rownish; 

 tibial spurs testaceous. 



cf. Unknown. 



Type, a female collected at Ute Creek, Colorado, July 19, 

 1907, (L. Bruner). 



Related to ater, from which it differs as follows: the produced 

 portion of the clypeus sciuarely truncate; iMincturation of the 



TRANS. AM. ENT. SOC, XLII. 



