22 Annals Entomological Society of America [Vol. XIV, 
broadly black, but the black rather definitely limited, reaching to the 
third cubital cell, base not black as far out as in P. ceberus and P. 
chrysothemis; head and pronotum with long black hair, metanotum with 
shorter hair, the upper surface strongly striate across, and with a dis- 
tinct longitudinal depression; suddenly declivous behind, the division 
marked by a median hump and lateral teeth; genital plate about one 
and two-thirds as long as broad, sides subparallel, tip deeply emarginate 
in middle, surface with few short hairs, base with a triangular tubercle, 
its apex running off into a median carina which extends nearly one-half 
way down the plate. 
Expanse, 54 mm. 
From Huachuca Mts., Arizona, (Biederman). 
Pepsis augustimarginata Vier. 
Palmerlee and Dragoon, Arizona. The male differs from ceberus in 
having the subgenital plate much more slender, the sides nearly parallel. 
The apex of the wings is only narrowly dark, and the base is dark 
hardly as far out as in ceberus; the metanotum has no distinct division 
between upper and posterior face, but is strongly striated, and densely 
clothed with long hair. The ventral hair-tufts are short, and with a 
wide free space between them. 
The species of Pepsis which I have seen from our country 
can be separated by the following table: 
1) Wings black; or mostly sosnot yellow or reddish... 2.3.2 .)- aap a eee 2 
Wings larvely yellowish or reddgsbr Wc). . sehr: tascelets cei. peel: eerie eee 5 
Oa Naamacianaralonic le geod ates ebenisee boots. a. dob anno Oolowies benume co to 6 elegans 
para Sara Gyo elks oleae ae BAA A A testi ee we he te nacre ore hie CIRM eit one CRG o's'0.0°0 3 
35, Apical third ok wings whitish byalines 228 nic > 0 oh Acie me eee oe ell venusta 
Only a narrow apical miarginYayaline: 01). .Gin. 2d ay. 2 abe “ere eee 4 
4. Apical margin of hind wings not hyaline in the female; with front femora 
hairy beneath; male with the subgenital plate elongate and long-haired, 
obliquerugosa 
Apical margin of hind wings narrowly hyaline in the female; front femora 
barely, if at all, hairy beneath; male with the subgenital plate short, 
and with a transverse carina, not noticeably hairy.............. mexicana 
5. Antennae with several joints yellowish or reddish..................2.0-0 6 
Antennae’ wholly yblackis, 6. 2G Ne atk ss eb a Le Oh alee ie ee eters ieee a 
6. Apex of wings broadly dark banded; male without apical fringe on the 
fifth ventral. ‘segments cs.,ceoc pehe isis. Goel nc kolo ss ects deg novitia 
Apex of wings narrowly banded with dark; male with apical fringe to the 
fifth ventral Vseemlents. 2k Aik oe hae coat oie! leet oe a re eRe: mildet 
7 I EEN 6 Mees Ate) eR Ab aR Ain: Hits blo d'baS.oh 2 aaldia tai oe 
Maile ae Pe Ree SNORTED RAG A Oda c.00 dela 4o Sata d og 8 0 15 
8. Subgenital plate elongate, more or less hairy, without a median tooth or a 
GLANSV.ETSE, CIGEE 5.0) sc acy lee sei eye ae RR Si Os Rene NER coe) 2 el eeen tae 9 
Subgenital plate shorter, with median and apical transverse carinae, the 
median one curved at ends, the apical one tooth-like at each end; no 
NAMA anaes CNA bISIAK IN Ola Mai nla nia mia go aac uaOs eS Oole heolaae chrysothemis 
Subgenital plate with a median tooth and an apical or subapical trans- 
Verse Tdge: morventral diaarator US esis yejee tetera ole elatege telat el lelel eel) satya) i 
ON Cayunia say een blakeatqnlonb ole Me aaIa A We inn Sunny digo o AeMindo bingo adeCo Se 10 
Ventral hair-brushes present toward the tip of the abdomen.............. 11 
