Eee game 
The Sphegoidea of Nebraska TE 
Subfamily PEMPHREDONINAE 
KEY TO THE GENERA 
Front wings with two recurrent nervures. 
Abdomen with the petiole never longer than the hind coxae. 
Hind tibiae along the outer face spinous or subserrate; head, seen 
from in front, wider than long, clypeus at apex emarginate; 
abdomen ovate, not longer than the head and thorax united, the 
PICTOLELE VELA SIIOR Es ictaicec erstaen tic cee ow clond nately eter’? a) Moke tena iva Diodontus 
Hind tibiae along the outer face smooth, unarmed; labrum trian- 
Pa cen ROLE ic? sc. le sd seca ela vine eed wm Sete oaths Passaloecus 
Abdomen with the petiole longer than the hind coxae; mandibles 
tridentate; first cubital cell receiving both recurrent nervures, or 
the second recurrent is interstitial with the first transverse cubital 
MPUMIECH CIRCE aaa ira nese Any Rita) a ab '> Sb hye wwe a Riou e'e's Gyeie ale aunty 300 Cemonus 
Front wings with only one recurrent nervure; front wings with two 
cubital cells; recurrent nervure received by the first cubital cell 
near its middle or a little beyond; second cubital cell quadrate; 
BICC Y PIOCH EACLE) A seme nt ominia sea eter bs cocks dre dies oie «wid praidacchs Stigmus 
Genus Diodontus Curtis 
Diodontus nigritus Fox. 
1892. Diodontus nigritus Fox, Transactions of the American Ento- 
mological Society, xix, p. 317. 
I find in the collection a single female without a locality label, 
but presumably from the western portion of the state, as the type 
was taken in Colorado. 
Genus Passaloecus Schuckard 
Passaloecus mandibularis (Cresson). 
1865. Pemphredon mandibularis Cresson, Proceedings of the Ento- 
mological Society of Philadelphia, iv, p. 487. 
1892. Passaloecus mandibularis Fox, Transactions of the American 
Entomological Society, xix, p. 320. 
Six females were taken at Glen, during the month of August. 
Easily recognized by the peculiarly shaped mandibles. 
Genus Cemonus Jurine 
Cemonus inornatus (Say). 
1824. Pembhredon inornatus Say, Long’s Expedition, ii, Appendix, p. 
339. 
1859. Pemphredon inornatus Say, Leconte edition, ii, p. 229. 
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