scuDDER. CANADIAN FOSSIL INSECTS. 33 



indications of one or two marginal impressed lines in their outer half, and 

 the whole surface seems to have been very minutely punctate, more faintly 

 and finely than in the existing species' mentioned. The abdomen is very 

 broadly and very regularly rounded, subovate, and at least five segments 

 of similar length can be determined. 



Breadth of the pair of elytra at base, 3 -7 5"""'; length of elytra, 

 5'5"""; breadth of abdomen, 3-25™"'; length of penultimate segment, 



Nine-Mile Creek, British Columbia. One specimen. No. 62 — Dr. G. M. 

 Dawson. 



Chyptocephalitbs Gen. nov. {Cryptooephalus, nom. gen.) 



Under this name I am compelled to place, until further material is at 

 hand, an elytron of a bettle which presents certain peculiar features I 

 have not been able to find in any modern form, £tnd by which it seems 

 to be allied to the tribe Cryptocephalini among Chrysomelidse. This 

 feature consists in the presence of an apparently flat, narrow and narrow- 

 ing area along the sutural margin, corresponding to that which would lie 

 within the first complete stria of the Cryptocephalini, and covering the 

 longer or shorter humeral stria (where one exists) ; this is accompanied by 

 an independent arching of the rest of the elytron with its striae. The 

 form of the elytron, especially its considerable apical narrowing and the 

 sculpture of its surface, does not agree well with this group of Chrysome- 

 lidse, and I am by no means confident that its place has been properly 

 indicated by this reference. 



Cryptocephalites punctatns. 



PL II, fig. 4. 



The single elytron is nearly perfect, only a fragment of the outer base 

 being lost. It is a little more than twice as long as broad, broadest 

 before the middle of the basal half, narrowing, at first gradually, after- 

 wards more rapidly, by the curvature of the outer margin, the apex 

 rapidly narrowing on both sides and bluntly subacuminate. There are 

 four blunt and dull-beaded ridges, with five narrower, slighter, and more 

 finely beaded but sharper ridges between them and outside the outer ones, 

 while the interspaces are marked by irregular longitudinal series of minute 

 beads, all the so-called beads being probably shallow puncta seen in 

 reverse; the flat inner area appears to have no definite sculpture, but to 

 be not altogether smooth. 



Length, 4"™; breadth, I'S"™. 



North fork of Similkameen River, British Columbia. One specimen. 

 No. 101— Dr. G. M. Dawson, 1888. 



