The Sphegoidea of Nebraska 41 
foeertnords black: *clypeus’ blacks fo. sis oe oe a wee ee rufinoda 
15. Metathorax, except-enclosure, red.....2....... 00000200 rufinoda cructs 
16. Apical joint of antennae much smaller in diameter at mid- 
dle than the preceding joint, longer, and strongly bent 
rT ee GI oe A ee ert A arn eo yr a IORI Cae ts ROCIOE 17 
16. Apical joint of antennae not as above; if it is much longer 
than the preceding joint it is not strongly bent........... 23 
17. Yellow band on second dorsal segment not much, if at all, wider 
medially than that on the third segment................. 18 
17. Yellow band on second dorsal segment much wider medially, usu- 
ally twice as wide or more than that on the third seg- 
PEPCTUE Hes orate ah ol eS SSE ee ee a Slee ats ie chen sl cTadaleld piaseipteteta’ 19 
18. Size larger, 13 mm.; clypeus convex, truncate apically... .sexta 
18. Size smaller, 8 to 11 mm.; clypeus depressed, front edge 
raised, forming a transverse ridge, tridentate apically, 
occipitomaculata 
19. Triangular enclosure of metathorax entirely striate or striate at 
ELT MSIGOSe recta aant sd el etet canciones aie eta plocdiat hin Sika ave enced aude sich 22 
19. Triangular enclosure of metathorax not at all striate, generally 
smropth awvith pimebures laterally sion... 05.05 so foe ve sles ee ee 20 
20. Apical segment of abdomen with a lateral brush of dense 
golden pubescence on each side of pygidium; ground color 
of abdomen generally black, sometimes that on the basal 
segment and rarely that on the entire abdomen ferrugin- 
ous; body clothed with grayish pubescence; length 15-17 
51030 Pl ar ERIC ih CREE OTT CORE RIO tics Seo Ee TCR OE One So venator 
20. Apical segment of abdomen without a lateral brush of pu- 
PIESCEIIC Giese tare abatey clic arteveraral suetancte eer eters aia ot esemiat pie eielcNeretenetemiatenten 21 
21. Femora reddish with a black spot posteriorly, yellow basally in 
front, tibiae and tarsi more or less yellowish; antennae 
fulvous; front and clypeus entirely yellow; mandibles yel- 
low basally; first segment of abdomen usually with a yel- 
PRR RaGt wiaLGnallaroae mista vis ate a ais ward caine aan aedels clypeata 
21. Femora black, sometimes tipped with yellow, tibiae yellow basally, 
tarsi dusky; antennae entirely black; at least lateral lobes 
of clypeus black, mandibles black; first segment of abdo- 
NCR IER by PPE? 32.555 Soe acre sual «hk ie walt eave Ueki fumipennis 
22. Sixth dorsal abdominal segment almost entirely yellow, 
bands on remaining segments rather broad............. vicina 
22. Sixth dorsal abdominal segment with only narrow apical 
margin yellow, remaining segments excepting second nar- 
LOR EM OWE sore Saga ec, acta amid dine Uoebemie a uemathabele eters deseria 
23. Second dorsal abdominal segment without yellow markings; front 
and clypeus yellow, sparsely punctured; basal abdominal 
segment with apical half yellow, third segment almost en- 
363 
