Indo-Chinese TJijmenoptera. 95 



prominent, rounded ; .nntennre long, slender at the apex, 

 second joint of tlie flagellum more than twice as long as the 

 Bcape. 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 striai moderately 

 coarse, bat 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 mm., 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. 



Hah. Than Moi, Tonkin, June 20, 1917; 1 $ . 



'J'his closely resembles superficially Ilemipepsis sycophantay 

 Grib., but is a more slender insect and belongs to a different 

 genus. Throughout the larger Psammocluuidte these super- 

 ficial resemblances between species of different genera from 

 tlie same locality are common. AVhether the tarsal ungues 

 of the male of this species are unidentate or bifid remains to 

 be seen. 



Cryptochilus fulvus, sp. n. 



5 . 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 ; unguicuUs unidentatis. 



<S . Feminae similis ; fronte, coxis anticis, trochauteribus, femori- 

 busque intermediis posticisque baei nigris ; unguiculis bitidis. 



Long., $ 15-20, 6 13 mm. 



$ . Clypeus broadly subtruncate at the apex ; labruin 

 broadly truncate. Frontal prominence well developed, 

 forming a bilobed projection between the anteniife ; second 

 joint ot the flagel uin about half as lojig again as the scape. 

 Pronotum with an indistinct longitudinal sulcus in the middle, 

 broadly and shallowly arched j)03teriorly ; the head and doisal 

 surface of the tiiorax rather sparsely clothed with short close- 

 lying golden hairs. JModiiiu segment very closely trans- 

 versely rugose-striate, truncate posteriorly, the })osterior 



