Indo- Chinese H. lymenoptera. 95 
prominent, rounded ; antenne long, slender at the apex, 
second joint of the flagellum more than twice as long as the 
scape. Front finely transversely rugulose, with a shallow 
median sulcus reaching to the anterior ocellus, vertex micro- 
scopically punctured. Head and thorax clothed with black 
hairs ; pronotum widely arched posteriorly, the arch not 
angled in the middle; scutellum rather strongly convex. 
Median segment transversely striate; the striz moderately 
coarse, but not much elevated, a low blunt tubercle on each 
side near the basal angles ; the posterior slope gradual, not. 
sharply divided from the dorsal surface. Abdomen shining, 
clothed with minute, close-lying, black hairs; the apical 
tergite densely clothed with long, stout, dark hairs. Legs 
long, length of hind tibia 11 mmi., of hind metatarsus 8 mm. ; 
hind tibia serrate, tarsal ungues unidentate. Second abscissa 
of the radius nearly as long as the third ; first recurrent 
nervure received very distinctly before the second transverse 
cubital nervure ; second just beyond one-third from the base 
of the third cubital cell. 
Hab. Than Moi, Tonkin, June 20, 1917; 1 9. 
This closely resembles superficially Hemipepsis sycophanta, 
Grib., but is a more slender insect and belongs to a different 
genus. Throughout the larger Psammocharide these super- 
ficial resemblances between species of different genera from 
the same locality are common. Whether the tarsal ungues 
of the male of this species are unidentate or bifid remains to 
be seen, 
Cryptochilus fulvus, sp. n. 
@. Nigra; capite, prothorace, mesonoto, scutello, postscutello, 
abdomine segmentis tertio apice, quarto, quinto, sextoque, pedi- 
busque aurantiacis; coxis intermediis posticisque nigris; alis 
flavis, margine apicali anguste fuscis ; unguiculis unidentatis. 
3. Femine similis; fronte, coxis anticis, trochanteribus, femori- 
busque intermediis posticisque basi nigris; unguiculis bifidis. 
Long., 2 15-20, g 13 mm, 
?. Clypeus broadly subtruncate at the apex; labrum 
broadly truncate. Frontal prominence well developed, 
forming a bilobed projection between the antennz ; second 
joint of the flagel um about half as long again as the scape. 
Pronotum with an indistinct longitudinal sulcus in the middle, 
broadly and shallowly arched posteriorly ; the head and dorsal 
surface of the thorax rather sparsely clothed with short close- 
lying golden hairs. Median segment very closely trans- 
versely rugose-striate, truncate posteriorly, the posterior 
