256 REVISION OF THE GENUS PAROPSIS, 



other species on whose elytra there is no difference (or scarcely 

 any) between the seriate and interstitial punctures it is because 

 the seriate punctures are unusually fine, — here it is because the 

 interstitial punctures are unusually coarse. To be quite precise, 

 it may be well to note that in the members of this subgroup 

 having the finest elytral puncturation the punctures of both 

 interstices and series on at least the external half of the surface 

 of the elytra are notably less fine than on the elytra of P. murio 

 This subgroup resembles the ls6 in having distinct, though not 

 strongly developed, prothoracic fovese; it resembles the 4th, 5th 

 and 6 th in having the elytral suture carinate in at least its hind 

 quarter. There is a species here and there in other aggregates 

 on whose elytral interstices there ai-e some coarse punctures near 

 the apex, or in a few interstices near the outer part of the disc, 

 but none, I think, having (as in the present subgroup) the punc- 

 tures of each interstice similar to those of the adjacent series 

 throughout. I have found the few species of this subgroup 

 peculiarly hard to tabulate owing to the close alliance of some of 

 the species structurally, and have had to fall back on using the 

 markings of the elytra, but I think the use of these will not lead 

 to error, for although the species are variable in markings I have 

 not found them disposed to vaiy towards resemblance to another 

 species. Occasional examples in which all the markings are 

 absent are, however, in some cases difticult to determine. 



A. Elytral series of punctures very flexuous. (Size 



large, about 6| lines) ceruua, Chp. 



AA. Elytral series straight or nearly so. (Size con- 

 siderably smaller). 

 B. Elytral seriate and interstitial puncturation very 

 coarse throughout (not or scarcely finer near 

 suture) ,. . lignea, Er. 



BB. Elytral puncturation less coarse (notably finer 

 near suture than elsewhere). 



C. Elytral markings (at least of (?) consist of 

 longitudinal lines of contrasted colours. 

 D. (? . Elytra testaceous-brown with the seriate 



punctures on narrow black lines geniculata, Boisd. 



