THE CANADIAN ENTOMOLOGIST. 281 



SCARAB^ID^. 



Ccenonycha, Horn. 

 The following is an insular form with vestigial wings : 

 C. Clementina, n. sp. — Form narrowly oblong, convex, dilated 

 posteriorly, reddish-brown, alutaceous, the female larger, paler and more 

 shining ; head densely but rather superficially punctate, more deeply on 

 the vertex and more evidently in the female, the clypeus reflexed at apex, 

 prominently dentate at each angle, sinuato-truncate between the angles ; 

 prothorax very nearly twice as wide as long, widest behind the middle, the 

 sides strongly rounded, converging and straight anteriorly, the basal angles 

 obsolete, very broadly and evenly rounded ; surface finely but strongly, 

 evenly and not very closely punctate, and. with short inconspicuous hairs ; 

 elytra about one-half longer than wide, or a little more ( ? ), finely, evenly 

 and r?ther loostly punctate and with very short hairs, each with two or 

 three fine and very feeble raised lines ; both claws of all the tarsi finely 

 and very minutely bifid at tip, the female similar in this respect, but with 

 the claws even more minutely or unequally bifid. Length, <$ , ° , 8.0-9.3 

 mm.; width, 4.1-5 o mm. Island of San Clemente. Tive males and 

 two females. ^ 



There are a few very stiff erect setae along the side margins of the 

 prothorax, and also just behind the elytral humeri. This species differs 

 from socialis, Horn, an inhabitant of Guadalupe Island, in its smaller size 

 and absence of sinuation in the sides of the prothorax toward the 

 prominent apical angles ; this sinus is, however, feebly evident in the 

 female. Dr. Horn states that the antenna? in socialis are 9-jointed ; the 

 antenna; in both sexes of the present species are very plainly 10-jointed, 

 and I am disposed, therefore, to doubt the accuracy of the statement 

 referred to (Tr. Am. Ent. Soc, 1876, p. 192). The mandibles are bifid 

 at tip, the inner lobe also very feebly bifid. 



Phobetus* Lee. 

 I do not know that a very singular character of this genus has been 

 hitherto noticed ; the middle tibiae of all my specimens, and possibly 

 therefore in both sexes, have a small reflexed uncus on the inner side of 

 the apex. The antenna? in all of the nine examples at present before me 

 consist of nine joints, which it might be inferred is constant in both sexes, 

 though the male and female seem to be not readily differentiated, unless 

 my material is all of one sex, which is somewhat improbable. The 



