Nl 
vs 
The Sphegoidea of Nebraska 77 
but microscopically punctate, the punctures of the first 
SERS A BEHC, ALB ER a op yet SiGe tines aan o/s ihige vie k Landed 29 
28. Third antennal joint much longer than 4 and 5 united...... 30 
29. First dorsal segment of abdomen with the puncturation much more 
distinct than on the remaining segments; greater part of 
femora and tibiae in part black; first abdominal segment 
; Msually spotted” with yellOwiwo. v.26 seccee ens peeks: odyneroides 
29. First dorsal segment with the puncturation but little more distinct 
than on the remaining segments; first abdominal segment 
usally “marked, with» yellow? i..0y00.03.255 5.0500. chrysargyrus 
30. Abdomen, or at least the basal segment, highly polished, 
impunctate or at most sparsely microscopically punctured; 
ygidial area much narrowed, deeply excavated and fully 
twice as long as wide at base; first joint of flagellum twice 
as long as the pedicel; scutellum black, postscutellum 
Wel ONT bento cee DE ALE COS CODED Ee Ee sexmaculatus 
30. Abdomen distinctly, minutely (somewhat sparsely) punc- 
tate; pygidial area more nearly triangular, and not twice 
as long as wide at base; first joint of flagellum only a lit- 
tle longer than the pedicel; both scutellum and postscut- 
ellitmanarkeds wathiyellow: Sse ..2co0.c os stad) sti, Kae ove stirpicolus 
Crabro cingulatus (Packard). 
1867. Thyreopus cingulatus Packard, Proceedings of the Entomolog- 
ical Society of Philadelplia, vi, p. 366. 
1895. Crabro cingulatus Fox, Transactions of the hime Ento- 
mological Society, xxii, p. 177. 
Only one specimen of this species, a male, has thus far been 
taken within the state boundaries, this at West Point, June 7, on 
Rosa (J. C. Crawford). 
Crabro hilaris F. Smith. 
1856. Crabro (Thyreopus) hilaris F. Smith, Catalogue of Hymenop- 
tera in the British Museum, iv, p. 416. 
1895. Crabro hilaris Fox, Transactions of the American Entomolog- 
ical Society, xxii, p. 179. 
In appearance very much like the preceding, but easily distin- 
guished by the relative lengths of the first posterior tarsal joint 
and longer tibial spur. Rather more common than the above, I 
have before me five female specimens from Lincoln and West 
Point, June to October. 
Crabro advenus F. Smith. 
1856. Crabro advenus F. Smith, Catalogue of Hymenoptera in the 
British Museum, iv, p. 421. 
399 
