[91] NORTH AMERICAN COLEOPTERA. 247 



ed in the middle near the lateral edges, the impression becoming extinct to- 

 ward the basal angles, finely, evenly and very densely punctate. Elytra at 

 base two-fifths wider than the prothorax; sides distinctly divergent, nearly 

 straight, slightly obliquely truncate at apex; exterior angles broadly, inner 

 more narrowly, rounded; humeri broadly rounded; disk feebly convex, broadly 

 aud feebly impressed on the suture towaidbase, nearly one-third longer than 

 wide, two and one-half times as long as the prothorax, very finely, evenly and 

 extremely densely punctate. Three segments of abdomen exposed together 

 wider than long, as wide as the base of the elytra; margin distinct, inclined; 

 surface feebly convex, finely, very feebly and very densely punctate. Under 

 surface and legs finely and densely pubescent., less densely so toward the tip 

 of the abdomen. Length 3.4-3.9 mm. 



California; (San Diego 3). Mr. W. G. W. Harford. 



Distinguishable immediately from the preceding by its 

 more depressed and broader form, more parallel elytra, 

 nearly three times as dense punctuation, darker legs, etc. 

 It differs from simulator in its much denser punctuation and 

 more depressed form. 



The three species may be distinguished as follows, the 

 characters of simulator being taken from a specimen from 

 Vancouver Island, kindly loaned me by the Museum of 

 Comparative Zoology at Cambridge : — 



Legs dark fuscous. 



Surface polished; strongly convex simulator. 



Surface under low power dull; very depressed densUS. 



Legs clear rufous; punctuation more sparse; form more slender mfipes. 



Since it is now known that there are several distinct spe- 

 cies of this genus, the absolute identity of the Vancouver 

 specimens taken by Crotch with simulator Lee, which was 

 described from the regions east of the Rocky Mountains, 

 may reasonably be questioned; a careful comparison of the 

 two is therefore very desirable. By careful comparison of 

 the above Vancouver type with the description given by Dr. 

 Le Conte and M. Fauvel, I am inclined to believe that the 

 former is a fourth species, hitherto undescribed. M. Fau- 

 vel mentions the prothorax as being longer than wide; it 

 this is actually the case, it is very distinct from any of the 



