COLEOPTERA. 67 



rows of from seven to nine generally rather large rounded and flattened tubercles, with 

 scattered minute granules on the interspaces, the apex being more closely tubercled; the 

 margins rather closely set with smallish, oblique, pointed setiferous, tubercles ; the carina 

 which traverses the epipleura is tubercled at base and apex and minutely denticulate between ; 

 the upper portion of the epipleura is studded (especially on its upper edge) with setiferous 

 tubercles, which are largest at the apex ; the lower portion is sparsely minutely granulose : 

 underside and legs densely tomentose ; four hind tibiae hispid, not fringed outwardly with 

 long hairs ; front tibiae strongly triangulate, the outer edge irregularly shortly spinose ; hind 

 tarsi not compressed, and with a few longish hairs outwardly ; the first joint as long as the 

 last : inner spur of the four hind tibiae nearly twice the length of the outer. 



Length 1\ lines. 



Yangihissar. 



The following four species of Pterocoma form a distinct group in the genus, and are 

 distinguished by the third joint of the antennae much elongated ; the prosternum protuberant 

 in the front, leaving a more or less triangulate open space between it and the head ') ; its pro- 

 cess enormously produced, sometimes nearly entirely overlapping the mesosternum ; the elytra 

 have each three (with the exception of Pt. semicarinata) crenated, or tubercled, costae, besides 

 the marginal, the third uniting with the marginal just behind the shoulder. 2 They all have 

 the true Pterocoma habit ; and the four hind tibiae are rounded. 



PTEROCOMA TIBIALIS. 



Black, somewhat nitid; the four hind tibiae distinctly rufescent : antennae slender, pilose, and 

 setose : legs also slender, spinose, and pilose : labrum notched in the mid t dle of fore margin : head 

 feebly punctured and pilose: antennary orbits reflexed, rounded anteriorly: prothorax convex 

 slightly sinuately emarginatein front; the angles acute and prominent; base strongly sinuate, 

 the angles small and somewhat outwardly directed, sides feebly rounded; finely, especially on 

 the disc, and sparsely tuberculate, the tubercles erect, pointed, and setiferous: scutellum 

 minute : elytra with a more or less strong depression behind the scutellum ; the first costa 

 distinctly continued along the base to the scutellum ; the intervals between the costaa nearly 

 smooth, minutely remotely granulous, feebly concave, with a few long decumbent hairs : 

 epipleurse a little rougher, finely rugose granulate, the hairs shorter and denser : marginal 

 costa closely set with long pointed teeth: prosternal process coarsely corrugated. 



Length 4f to 6J lines ; width of elytra across the middle 2f to 3f lines. 



Neighbourhood of Sanju. 



PTEROCOMA SERRIMARGO. 



Smaller than the preceding, dull brownish black: four hind tibiae not distinctly rufescent. 

 Antennae shorter and stouter : labrum not notched in middle of fore margin : apex of protho- 

 rax not at all sinuate, the angles scarcely so prominent ; the base not so strongly sinuate as in 



1 Lacerdaire has given the name of " mentonniere " to this form of prosternum. 

 1 The same is found in Lasiostola pubescens, Pall. 



