Casey — A Revision of the American Paederini. 181 



inner but short and very broadly obtuse. It is probable that 

 other species of this genus will occur in Cuba and else- 

 where in the Caribbean region. 



Oligopterus Csy. 



Although possessing a distinct habitus, the very small and 

 slender species of this genus are closely allied to Caloderma, 

 having similarly four minute labral teeth, the two inner — at 

 each side of the median sinus — less minute than the two outer, 

 the widely separated and feebly denned arcuate gular sutures 

 mutually most approximate well before the middle of the 

 under surface of the head and the anterior tarsi slender, fili- 

 form and not at all dilated but only slightly thickened, even in 

 the male. The genus differs, however, in the very small 

 elytra, which never exceed the prothorax in length, in the 

 minute eyes, shorter metasternum and coarser sculpture of 

 the abdomen above and beneath. The species are few in 

 number, widely distributed over nearly the same geographical 

 regions as Caloderma and are even more closely allied among 

 themselves than the members of that genus ; the species in 

 fact resemble each other so closely that, were it not for the 

 much more widely separated gular sutures of remotus, I 

 would be disposed to consider them all as subspecies of a sin- 

 gle generic type. The four forms in my cabinet may be out- 

 lined as follows: — 



Gular sutures separated by a minimum distance equal to about a seventh of 

 the total width of the head, the latter well developed, as wide as long, 

 somewhat wider than the prothorax, the sides parallel and straight, 

 the angles rectangular and but slightly rounded; punctures small but 

 strong, moderately close-set; prothorax obtrapezoidal, slightly wider 

 than long, the anterior angles distinct, the punctures strong and sim- 

 ilar to those of the head ; elytra distinctly shorter than wide, equal in 

 width to the prothorax and not quite as long, the sides feebly diverging 

 from the base, the punctures close, strong and asperate; abdomen as 

 wide as the elytra, finely, densely and asperately punctate; color dark 

 rufo-piceous, the elytra darker and the abdomen black, the legs and an- 

 tennae dark red-brown. Length 2.6 mm; width 0.4 mm. California 

 (San Francisco) remotus n. sp. 



Gular sutures similarly fine, feeble, arcuate and unimpressed but more ap- 

 proximate, mutually distant at their point of minimum separation by 

 about a twelfth of the width of the head 2 



