THE CANADIAN ENTOMOLOGIST. 273 



Differs profoundly from the preceding species in its more obese form, 

 greater convexity and very much more developed elytra. 



Pseudactium cephaliciim^ n. sp.--Form narrower, more depressed and 

 parallel, shining, subimpunctate, dark testaceous, the pubescence much 

 longer and more conspicuous than in either of the preceding ; head nearly 

 as in the preceding, larger^ wider than long, the eyes rather small, convex, 

 the tempora somewhat strongly converging ; antennae with the last joint 

 but little longer than the preceding three, rather acutely pointed; prothorax 

 evidently narrower than the head, wider than long, constituted as in the 

 preceding ; elytra more nearly as in Caroiince, much shorter than wide, 

 barely one-half wider than the prothorax, rounded and basally narrowed 

 at the sides, the dorsal stria unusually developed, obsolete at apical third ; 

 abdomen slightly narrower and evidently longer than the elytra, the basal 

 impression of the first dorsal very feeble. Length, 1.35 mm.; width, o 38 

 mm. Pennsylvania (Westmoreland Co.), Schmitt. 



This species is represented by the female alone and is more closely 

 allied to Carolince than to mellinum, but differs from both in its much 

 longer pubescence and more elongate discal stria of the elytra. The 

 species described by Brendel under the name Trvnioplediis ? paraholicus^ 

 is evidently a member of this genus, but differs, among other features, in 

 its very abbreviated elytral stria or sulcus, which is said to extend only a 

 fifth from the base. The locality was not nientioned by the describer, but 

 the type was probably found in Iowa. 



Or opus, Csy. 



This is probably the largest genus of peculiarly Pacific coast Psela- 

 ]:)hid8e, and numerous species have come to light since my last revision. 

 They are rather closely allied among themselves, but may be assigned to 

 three easily-recognized divisions, as follows : 



Basal segment of the dorsum but little longer ihan the second 2 



Basal segment much elongated, constituting nearly half the abdomen as 

 viewed from above (Group III) 1 2 



2. Larger, stouter and more convex species, the elytra about as long as 



wide (Group I) 3 



Smaller, more slender and more depressed species, the elytra always 

 distinctly shorter than wide, with the rounded sides more diverging 

 from the base (Group II) 9 



3. Head large, about as wide as the prothorax .... 4 



Head smaller, always distinctly narrower than the prothorax .6 



