20.3 



pore with a distinct base, anterior angles often thickened and 

 obliquely truncate, posterior angles generally rounded; surface 

 convex, considerably sloping down at the sides, always punctate ; 

 the punctures may be coarse or fine, closely placed or sparsely 

 distributed, and besides this the surface may be finely granulose or 

 smooth; in some species there is an impressed punctate line along 

 the basal margin. Scutelhmi small, triangular, with apex broadly 

 rounded, surface either finely granulose or without the granulation. 

 Elytra generally almost of the same width at the base as the 

 prothorax, but sometimes slightly wider, always punctate-striate, 

 each elytron having usually eleven rows including the short 

 scutellar row and the extreme marginal row ; in some cases the 

 punctures are crowded and less regular in the area round the 

 seutellum, and on the disc the rows may not be quite straight ; 

 in some species all the interstices are distinctly costate, in others 

 some of them tend to be costate on the lateral and apical parts of 

 the elytron ; in several species the interstices are very finely punc- 

 tate, in others, again, the interstices are very close together and 

 narrower than the seriate punctures themselves ; the type of the 

 genus has this kind of arrangement of the rows. Underside 

 generally punctate and bearing fine hairs ; epipleura of the elytra 

 generally broader at the base, considerably narrowing towards 

 the apex and often punctate ; presternum moderately broad and 

 punctate; anterior coxal cavities closed behind ; posterior femora 

 considerably thickened ; tibiae and tarsi generally slender. 



The important distinguishing character of the genus is that 

 each of the middle and hind tibiae possesses a long excavation of 

 the outer edge (figs. 77-80) extending from its apex to a certain 

 distance up the tibia ; this emargination is fringed with bristly 

 hairs, some of which, particularly those at the apices of the emar- 

 gination, are developed into spines. The first segment of the 

 tarsi is long, the third bilobed, and the claw segment projects to a 

 certain extent beyond the bilobed segment ; the claws themselves 

 are separated and generally appendiculate. 



Chcetocnema is a natural genus with a characteristic build of the 

 body which, once recognised, cannot he mistaken. 



Range. World-wide. 



Key to the Species. 



1. Interstices between the longitudinal rows 



of punctures on the elytra very narrow, 

 the row\s being- close to each other and 

 the punctures themselves being larger, 

 and sometimes more or less confused 



on the disc 2. 



Interstices broad and striae regular 4. 



2. Punctuation more or less confused and 



striae somewhat irregular on the middle [p. 205. 



of the disc Ch. pusaensis, sp. n., 



