Sphecoidea of Nebraska 63 
8. Head and thorax subtilely punctured, clothed with unusually long 
pubescence; cheeks not! keeled beneath; tibial shield broader than 
long, yellowish on anterior half, more or less whitish on posterior 
LN IS aa Ee ee A IS ae A ES en teh SF bruneri 
Head and thorax coarsely sculptured, not pubescent more than usual; 
cheeks beneath along the eye-margin with a slight keel; clypeus 
yellow; tibial shield dark brown, darker anteriorly, marked with 
municrats, auc, yellowish Streaks: 2... i600 o's 0s cas shee see advenus 
9g. Scape of antennae cylindrical, not broader at apex than at base, fla- 
gellum tolerably slender, slightly subclavate; mesosternum with 
short, sparse, pale silvery pubescence, wings fusco-hyaline...hilaris 
Scape of antennae compressed, broader by far at the apex than at the 
base, flagellum stout, not thickened medially nor clavate; meso- 
sternum with long, dense, white hair, wings hyaline ............ 10 
10. Abdomen but little longer than head and thorax united, the sixth ter- 
gite rarely spotted with yellow; fore femora beneath, towards base, 
with sparse, not long, white pubescence, at least not as long nor as 
dense as that on the mesosternum laterally (fore and intermediate 
femora marked more or less with black) ................. cognatus 
Abdomen nearly twice as long as the head and thorax united, the sixth 
tergite always spotted with yellow; fore femora beneath with dense, 
white pubescence, as long and as dense as that on the mesosternum 
laterally (fore and intermediate legs entirely yellow) ....cingulatus 
11. Fore tarsi greatly flattened; prothorax, tubercles and scutellum marked 
SUL ol Lo, Ge ORO emer o PRON Sia Phe? Rae co es Slee Pet planipes 
oreetarsie tot ala thenedmOne GIStOrted wre som slceseelachers ore ayaiersinv ei cle otaie 12 
12. Ultimate tergite distinctly more strongly punctured than the penulti- 
mate; posterior face of propodeum transversely rugose; clypeus and 
greater part of scape, prosternum and fore coxae and trochanters, 
black; “at the base of propodeum is a row of minute fossae,” 
minimus 
Ultimate tergite not, or scarcely, more strongly punctured than the 
PRESIOULUE TMA LEL | hs.5)', Fo oe shui sch aena acehey alehes eee estocal Sette Pahari store ceva taen vite w axdions 13 
13. Thorax without yellow spots; enclosure of propodeum with two large, 
smooth areas; greater part of four anterior legs reddish; hind tarsi 
Meee PELCOIIGS 2 5 tis a, 20s iy etauieaacatdta, wan Saeed « Bain ai a en nigricornis 
Etethorax and ‘scutellum: yellow! O5 6005. 60s dees «csce sx impressifrons 
Crabro (Hoplocrabro) vierecki H. S. Smith. 
1908. Crabro vierecki H. S. Smith, Univ. Nepr. Srunpies, VIII, p. 
40l. 
Females 2: Glen, August 13, 1906 (H. S. Smith), and Monroe 
Canyon, August 20, 1908 (R. W. Dawson). 
381 
