68 SECOND YARKAND MISSION. 



the preceding : scutellum larger : elytra not depressed behind the scutellum ; the first costa 

 not distinctly continued along the base to the scutelluoi; the intervals from near the base 

 clothed with a cinereous pubescence: prosternal process relatively broader, sparsely granulose. 



Length 5 lines ; width of elytra across the middle 3^ lines. 



Kogyar. 



PlEROCOMA CONVEXA. 



More narrowly ovate, and more convex, than the preceding ; black, a little nitid ; thinly 

 clothed with fine cinereous pubescence and setose ; legs tomentose, finely setose, and pilose : 

 labrum entire in front : head and prothorax at bottom very finely, densely, and rugulosely 

 punctulate, and with scattered small setiferous tubercles, which are largest on the sides of the 

 latter ; apex of prothorax truncated; the base sinuate : elytra not depressed behind the scutel- 

 lum ; base a little emarginate at each side, rapidly declivous behind ; the intervals with scat- 

 tered minute punctures mixed with very small setiferous tubercles ; the first costa strongly 

 continued along the base to the scutellum : underside more densely tomentose and studded with 

 small setiferous tubercles : prosternal process not quite so strongly produced, and more pointed 

 behind than in the preceding, and rugosely tuberculate. 



Length 5 lines ; width of elytra across the middle, 3 lines. 



No locality given. 



PTBBOCOMA SEMICARINATA. 



Very broadly ovate, the elytra being almost rotundate ; black, slightly shining : labrum 

 emarginate in front, the angles very broadly rounded : head with a few rather large, shallow, 

 scattered punctures, most perceptible on the epistoma, and with some small setiferous tubercles 

 clustered above the eyes ; and others, still smaller, flattened, and not setiferous, on the crown : 

 prothorax slightly sinuate in front, the angles acute and prominent ; the sides studded with 

 setiferous tubercles, the disc having a few flattened tubercles which are distinctly umbilicate : 

 each elytron with a single costa placed half-way between the suture and the shoulder, 

 and extending but little beyond the half the length of the elytron ; this costa is furnished with 

 tubercles which are a little flattened at top, clustered two or three together at the base 

 they gradually thin out into single ones, and become smaller, behind ; it is also strongly con. 

 tinued along the base to the scutellum, the tubercles here being largest of all ; between this 

 costa and the side are indications of two other costse, the outer one being decidedly the most 

 distinct, these are composed of distant, very small, setiferous tubercles, there are also a few 

 exceedingly minute tubercles scattered on the intervals near the base, each carrying a short 

 seta; the marginal carina is composed of a double row of closely -set bluntish tubercles, 

 which gives to the margin a finely-crenulated appearance : there is no trace of pubescence on 

 the upper surface ; the underside is thinly pubescent, the abdomen neither granulose nor 

 tuberculate : prosternum very coarsely, deeply, and confluently punctured ; its process very 

 strongly produced, smooth and polished. 



Length 6 lines ; width of elytra across the middle 4|- lines. 



Yangihissar. 



