FRANK E. BLAISDELL, SR. 321 



Coelus pacificus Fall 



Form broadly oblong, elliptical and moderately convex; color piceous-black, 

 surface polished. 



Labrimi with a few small scattered punctures near the apex, surface otherwise 

 smooth. 



Epistoma arising ^-er^' gradually from the frontal suture and i-ather finely 

 sculptured, broadly sinuate at apex. 



Mentum broadlj' and not deeply sinuate at apex; sides more or less arcuate, 

 coarsely margined; surface rather convex medially at apex, elsewhere more or 

 less impressed and asperato-punctate but rather glalirous along the apical 

 margin. 



Pronotum moderately, densely, evenly punctate throughout, widest immedi- 

 ately before the base; sides rather feebly arcuate and strongly convergent. 



Prosterniim coarsely and somewhat asperately punctate; punctures not 

 crowded. Process very coarsely margined between the coxae; submarginal 

 groove strong; central area convex; dilated apical portion more or less glabrous 

 and, in the examples examined, broadly impressed. 



Measurements.- — Length, 7 mm.; width, 5 mm. 



Seventy-five examples studied. Fall states that the prothorax 

 is equal in width to the elytra; a little more than twice as wide as 

 their length at the middle. These characters have been found to 

 be very variable in the series examined. 



"Elytra twice as long as the thorax along the median line, not 

 longer than wide; equalh' densely but more finely punctate than 

 the pronotum. The marginal fringe of hairs on the prothorax is 

 noticeably shorter and finer than in any of our mainland species. " 



Type region, San Nicholas Island. Type collected on May 

 24th. Fall mentions a series taken by Dr. Eisen on Santa Rosa 

 Island and states that, with the exception of some variation in size, 

 these differ in no noticeable respect from the type. The author 

 has examined material from both of these islands and possesses a 

 specimen collected on Santa Rosa Island, kindly given to him by 

 Prof. Fall. Mr. Van Duzee recently (May 17-20, 1919) visited 

 Santa Cruz and San Miguel Islands where he collected a series of 

 sixty-nine specimens of pacifiais. These have afforded an op- 

 portunity to study the sexual differences and show the males to be 

 usually broader and more o)>long than tlu^ females. 



Coelus remotus Fall 



Form^ ver}- convex; color piceous-black; legs and elytra brown; epistoma 

 l)roadljf sinuate; pronotum similar in outline to pacificus but shorter, its surface 

 subopaque, densely, coarsely punctate; elytra pohshed, densely, finelj' punctate, 

 without trace of asperities. 



Measurements. — Length, 6.5—7 mm.; width, 4-4.5 mm. 



TRANS. AM. EXT. SOC, XLV. 



