Sphecoidea of Nebraska 117 
Stizus neglectus (Cresson). 
1872. Monedula neglecta Cresson, Trans. Amer. Ent. Soc., 1V, p. 222. 
1895. Stisus neglectus Fox, Proc. Acad. Nat. Sc. Phil., p. 268. 
Females 14: Omaha (13) and Lincoln (1); July 7 to Septem- 
ber 5; visits flowers of Chamaecrista fasciculata. 
Stizus unicinctus Say. 
1823. Stisus umicinctus Say, West. Quart. Rep., U, p. 77. 
1895. Stisus unicinctus Fox, Proc. Acad. Nat. Sc. Phil., p. 268. 
Males 77, females 40: Omaha (1), South Bend (1), Lincoln 
(11), Fairmont (16), Maskell (1), Carns (4), Trenton (7), 
Haigler (1), Mitchell (63), Pine Bluffs (1), Bad Lands (1) and 
Sioux county (1); June 20 to September 26; visits flowers of 
Melilotus alba, Achillea millefolium and Asclepias sp. 
Stizus brevipennis Walsh. 
1869. Stizus brevipennis Walsh Amer. Ent., I, p. 162. 
1895. Stizus brevipennis Fox, Proc, Acad. Nat. Sc. Phil., p. 268. 
Males 6, females 1: Omaha (1), Meadow (2), Lincoin.(2); 
Red Cloud (2) and Carns (1) ; July 21 to August 13. 
BEMBICINAE 
KEY TO THE GENERA 
t. Anterior ocellar cicatrix circular or elliptical in form, placed in a pit; 
eighth sternite ending in three spines, and in many species bearing 
MLO EMM GISCAM SPINE! set Pave cso Salsa c cisis @aelspanlsion ceeieees Stictiella 
Anterior ocellar cicatrix linear, transverse, straight or curved, in a few 
species the ocellus not completely obliterated .................¢- 2 
2. Posterior surface of propodeum concave, its lateral angles prolonged, 
compressed and wedge-like; maxillary palpi with six segments, labial 
with four; eighth sternite of male ending in three spines...Bicyrtes 
Posterior surface of propodeum flat or convex, its lateral angles 
rounded ; palpi otherwise; eighth sternite of male ending in a single 
Sid MMMM Estate fo, vot cect sini 8 Cha cc nha ares almio eb) a didi a: ssi Ob rebar oreperatetatarak Decora @ 
3. Mandibles dentate; apical end of radial cell of anterior wing on costal 
border; maxillary palpi with four segments, labial with two.Bembix 
Mandibles not dentate; apical end of radial cell of anterior wing not 
on costal border; maxillary palpi with three segments, labial with 
GiKS.” 1g Sot EBA ADR CER REEE RIO ODD CR ERED EPR Scoot Microbembex 
