The Sphegoidea of Nebraska 75 
13. First transverse cubital nervure received in about the middle of 
the marginal cell, the space between the recurrent nervure 
and the apex of the cubital cell not or rarely greater than 
toe wide onthe lattercceld at apexes’ dai eine See's cite me's 15 
14. Pronotum with the lateral tooth small and weak; pronotum 
entirely, scutellum and metanotum in part, yellow; second 
and third ventral segments sometimes spotted with yellow, 
cingulatus 
14. Pronotum with the lateral tooth strong; pronotum with 
two yellow spots only; no yellow on scutellum, metanotum, 
OTHUNICIVEC Teh s ates are cico. e)-sye ys van dle, arene: Suave. wceiay a oust elt guetta aba eratat Mavens argus 
15. Sculpture of head and thorax fine, rather indistinct, punctures 
shallow; clypeus and scape except apex, black; markings 
whitish; head and thorax clothed with thin, pale, long 
PUL ESCEN COW Aare ake eases hens wiateot ov oi afiaie Phar aves aiken eh vernalis 
15. Sculpture of head and thorax, especially of the mesonotum, dis- 
PRE PAIAWEL pIAT RE Fo iow otras hee eeu Ch ok tee ee cE 16 
16. Metanotum very coarsely sculptured, with strong longitud- 
inal or oblique ridges, which extend to the base of pos- 
terior face; scape yellow anteriorly; bands on first three 
abdominal segments broadly interrupted; tips of femora 
AIGIaay Cll O Warne were vai nda seatere sts siete ieiciet Se et oldie woaer stants advenus 
16. Metanotum not so coarsely sculptured; if it is, then the 
ridges become obsolete toward the posterior face; lateral 
markings on abdominal segments three and four broad; 
second and third ventral segments spotted, hind tarsi yel- 
{1 21a Pa OP Rae deh APES SAE a Os a Eaten Fore hears chs 17 
17. Length 14 mm. or over; thorax with heavy fuscous pubescence, largior 
17. Length 10 mm. or less; thorax with thin gray pubescence...... VICINUS 
TEIN TE SR eNO Nn LADIES et oe a YE ea aA ES 19 
ERM IRI ESN Mane nee vetetet ela he etal Mes ealeiavins hokage erie. cls Steal eae a daa 25 
19. Supraorbital foveae always distinct, sharply defined, elongate or 
linear; head quadrate coarsely punctured; abdomen with 
one, more rarely with three terminal bands, remaining 
segments with transverse yellow spots............. interruptus 
19. Supraorbital foveae wanting or at most not sharply defined, indi- 
cated only by a slight glabrous depression or streak in the 
sculpture close to the eye margin...........0ccceeceeees 20 
20. Front femora with a tooth or dilate angulation at base be- 
neath; antennal joints 3-6 emarginate beneath, the sixth 
very strongly so; mesopleura and metathorax coarsely 
BEG tat cage cit Sere te is hiv Maa eyo wae ON Rl Oe eae 21 
20. Front femora without a tooth beneath: ....2..0. 00.0044 208 22 
21. First dorsal segment of abdomen with punctures much more dis- 
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