Coleopferological Notices, V. 603 



differs from ocularis and pulvereus not only in the structure of the 

 palpi and antennae, but in the smaller foveas of the head and pro- 

 notum, and in the larger elytra, much more strongly narrowed from 

 apex to base. 



CTEIVISIS Raffray. 



This genus was proposed by Mr. Raffray (Rev. d'Ent, 1890, p. 

 143) to receive certain American species previously described under 

 the names Ctenistes and Desimia. It is related to the latter of 

 these, but has the second dorsal segment not notably longer than 

 the first and also differs in the form of the palpi. The antennae are 

 similar to those of the European Desimia and Ctenistes, but the 

 palpi of Desimia have the last joint bifid and in fact perfectly 

 similar throughout to those of Tmesiphorus ; there are also other 

 suggestive points of resemblance between Desimia and Tmesi- 

 phorus. In Ctenisis the last tw^o joints of the palpi are in the 

 form of a regular isosceles triangle, each attached by the acute 

 angle near the internal angle of the preceding. The single known 

 species entering the United States may be described as follows: — 



C raffray i n. sp. — Rather slender, moderately convex, polished, sub- 

 iinpunctate and ferruginous throughout ; pubescence short, subrecumhent, 

 sparse, coarse but not squamiform. Head across the eyes rather wider than 

 long, the eyes very large and prominent, one-half as wide as the interocular 

 surface ; upper surface flattened, with three fovese forming an equilateral tri- 

 angle ; frontal tubercle narrow, not wider than the eye from above ; antennae 

 long and slender, two-thirds as long as the body, joints three to seven small, 

 moniliform, wider than long, eight to ten thicker, cylindrical, the eighth as 

 long as the preceding four together, a little longer than the ninth but shorter 

 than the tenth, the latter twice as long as wide, eleventh but little thicker, 

 cylindrical, one-half longer than the tenth, obtusely pointed. Prothorax as 

 wide as the head, two-fifths wider than long ; sides parallel to the middle, 

 then feebly convergent to the truncate apex, which is three-fourths as wide as 

 the base ; disk with three very densely pubescent subfoveate areas along the 

 basal margin. Elytra nearly as long as wide, twice as wide as the prothorax 

 and nearly twice as long ; sides broadly rounded behind ; humeri very obtusely 

 rounded ; humeral width four-fifths of the subapical ; discal glabrous line 

 evanescent toward apex. Abdomen a little narrower than the elytra but nearly 

 as long ; border strong, inclined. Length 1.65 mm. ; width 0.65 mm. 



Arizona (Tu93on). Mr. H. F. Wickham. 



The description refers to the male, the anterior tibiae being thick- 

 ened somewhat as in Tmesiphorus. In the unique type the last 

 ventral segment is very short, unimpressed but sinuate at apex; the 



