AMERICAN COLEOPTBRA. 255 



The third group Ciiolev^ as already remarked contains only 

 genera with eyes, although these organs are feeble in Adelops. The 

 head is suddenly narrowed to a neck, the eyes occupying the promi- 

 nent lateral angle of the head. The tarsi are five-jointed on all the 

 legs in both sexes. The genera all of which are represented in our 

 fauna are as follows : 



Mesosternum not carinate, the middle coxae contiguous, last joint of the 

 maxillary palpi as long as the preceding. 

 Antennse serrate; tibial spurs moderate in length, simple. ..CatoptrichilS. 

 Antennae gradually clavate. 



Tibial spurs not long, simple Cholera. 



Tibial spurs very long, bipectinate Prionochieta. 



Mesosternum carinate, coxae separated; last joint of maxillary palpi short, 

 subulate. 

 Antennse gradually clavate not longer than the head and thorax; eyes well 

 developed; mesosternal carina at most moderately prominent. 



Ptoinaphagns. 



Antennae slender, longer than the head and thorax; eyes small, mesosternal 



carina prominent, keel-like Adelops. 



As far as known to me Cafoptrichus, Prionochseta and Adelops are 

 peculiar to our fauna, the others occur also in Europe. 



CATOPTRICHUS Murr. 

 Form moderately elongate. Head suddenly narrowed behind the eyes, 

 occiput elevated. Eyes flattened posteriorly. Antennae a little longer than 

 the head and thorax, joints 5 — 10 perfoliate and emarginate beneath as in 

 Prionus, the eighth joint one-half as long as either the seventh or ninth, 

 eleventh joint elongate-oval, acute at tip. Maxillary palpi slender, the termi- 

 nal joint a little longer and more slender than the preceding, acuminate at tip, 

 third joint feebly conical, second slender. Middle and posterior coxae con- 

 tiguous, the mesosternum not carinate. Tarsi slender, anterior tarsi and first 

 joint of middle (feebly) dilated in the male; hind tarsi with first joint as long 

 as the next three. Tibiae finely spinulose externally, the spurs slender, the 

 inner of the posterior tibiae half the length of the first tarsal joint. 



This genus is most closely related to Choleva as defined in the 

 present paper and differs only in the structure of the antennae. 

 It may be hardly necessary to state that this insect was unknown 

 in nature to Mr. Murray and that his remarks are not entirely 

 correct. 



One species only is known. 



C Frankenhaeuseri Maan. ( Ca^ops).— Moderately elongate, piceous, 

 elytra, legs and antennse at base ferruginous. Head moderately densely punc- 

 tate, feebly shining. Thorax nearly square, angles obtuse, sides very feebly 

 arcuate, the margin posteriorly feebly deplanate, disc posteriorly slightly flat- 

 tened, surface feebly shining moderately densely punctulate. Elytra ferrugi- 

 nous, oblong-oval, humeri broadly rounded, sides moderately arcuate and 



