1921] Banks: Nearctic Fossorial Hymenoptera 23 
10. Subgenital plate slender, densely hairy; wing-tips hyaline.......... nephele 
Subgenital plate broad, emarginate at tip, scarcely hairy, wing-tips 
ins SWC lilac hin 0 palais ol dl pee eRe AN. Wc hre le ae er rrr arizonica 
11. Fourth ventral segment with oblique hair-row or tuft; extreme tip of 
aumiyemvaeye SBIGIL LS so dG a bolo pre Ue ero nl Gm Oa 0a Pe pe ei ta ene ee oot 12 
Fourth and fifth ventral segments with hair-tufts; extreme tip of antennae 
ECCS ly een ee Reis CN Pom HTD Crodiiatcte syste sive ees os boguet 
12. Subgenital plate more than three times as long as broad. . .angustimarginata 
Subgenital plate about twice as long as broad...................... cerberus 
Line met man menedo Meat TAD. psmisuct sates isglaecetly tried (ouelosw«/+ pallidolimbata 
Mimesnp li NGOt ened WALOLG: LID. otis cca els ogg dies ea vis st uals eae 14 
Peer eeretitally meets re Atte oe SS hace Taek eke Mahine Whe a a weg os cinnabarina 
SNLBa ieee ll NON al, Os Ri Ae 7 OE aang a AR re eee aA eae formosa 
15. Front femora with long hair beneath; very large species with the pre- 
apical dark band of fore wings broad and extending basally into the 
‘Havreal! ° xb] Sulicedl Lee @XeI Ul ora cneyza co Ghegostl occkaw ht cleat cle a casted lncdl pao nuance micro nephele 
Brontremonawathinewll any, ains beneabhnsa.) ses. ts cee eee 16 
16. The hind tibiae have the bristles among the spines much longer than the 
spines and curved; no distinct transverse ridge on metanotum separating 
Upper rand pPOSterlOr SUPlACES 2 cis: teers oe «le ciel se ees ste imermts 
The hind tibiae with bristles straight and not longer than the spines; 
metanotum with a distinct ridge separating the upper and posterior 
TRAV OLSI og U cob INSU HORS TENE eR TDN eI ciel SOAS RR Cerra Ts Pathe 17 
17. The posterior part of pronotum very plainly hairy above................ 18 
Rostenor pagnon prlonotvum nOb NainysOn SCAanCelysSOne asa 15 cree = 20: 
18. Wings reddish, extreme tip pale; posterior face of metanotum striate 
ACROSS Mets OMe Le y cc TEER ace ik cepts] ois IMI SiO eset Sere shawty LIME cinnabarina 
iasratuwisies willy atk as ae oti Ria sin Ree ge ie ela selene eites) lets ngs 19 
19. Extreme tip of antennae reddish; tip of wing broadly dark; posterior face 
Of metanovam not strate im: middle: isos. ..0c..s5-0.+ esas. + sees boguet 
Extreme tip of antennae black; tip of wing narrowly dark; posterior face of 
metanobum, strate imimiddle., .-sicceaw.pensman- cose angustimarginata 
20. Wings without distinct preapical dark band; posterior face of the meta- 
MO GUAES ELTA LCLACTOSS ss matte tat cers legiis ope + sad Shame heats crripea akan pallidolimbata 
Winosiwitheapical or preapicaledark- band... 6. cesta re tee eee 21 
21. Apical dark band to wings; posterior face of metanotum scarcely striate, 
lucast 
Preapical dark band, extreme tip pale; posterior face of metanotum 
SPRL UC RA CLOGS erm ep ta crarih ances Sark Siac nhes eine sites Seite eR SO formosa 
Three species not placed in the table have been recorded 
from the United States. 
Pepsis charon Mocz. 
Recorded from Texas, is similar to P. elegans, but the male 
has short hair on the fourth and fifth ventral segments. 
Pepsis sanguiguttata Christ. 
Recorded from Texas, is a West Indian species with dark 
wings on which is a stellate reddish spot. 
Pepsis circularis Fox. 
Close to P. chrysothemis; the subgenital plate is the same; 
it differs in that the sixth ventral segment is extended above to 
cover the sixth. dorsal segment; but one male is known; it is 
from Texas. 
