NORTH OF MEXICO. 



341 



CIBDELIS, Mann. 



Cibdelis, Mann., Beitrag. 284. 



The mentum is trapezoidal, narrower behind, strongly (blaschkii) or feebly (bachei) 

 rounded in front, convex at middle, with a faint groove on each side, supported by a gular 

 peduncle. Head rounded in front, truncate (blaschkii) or emarginate (bachei) at middle 

 ofepistoma. Thorax truncate in front, rounded behind, hind angles distinct, not promi- 

 nent, anterior angles obtuse. The metasternum is short and the body apterous. The 

 mandibles of both species are very feebly emarginate. 



Two species from California are known. 



C. blaschkii, Mann., Beitr. 284. 



The thorax is densely and rather coarsely punctured. The elytra have faint strise of 

 punctures, and small rounded tubercles placed in more or less regular rows. This 

 species is more convex and elongate than the next, and (lifters also in the form of the 

 front and the greater prominence of the front of the mentum. 



Length .52-.56 inch. 



Occurs from San Francisco southward, under bark and stones. 



0. baohei, Lee, Proc. Acad. 1861, p. '553. 



The thorax is here granulose, less convex and proportionately broader than blaschkii. 

 The thorax and elytra are also more opaque, and the tubercles of the latter rather smaller 

 and more closely and regularly placed. The elytra are rather more depressed and more 

 broadly oval than the preceding species, and differs also in the characters mentioned 

 above. 



Length .56 inch. 



Occurs only at Santa Barbara and on the Island of San Clemente. 



GLYPTOTUS, Lee. 



Glyptotns, Lee, Proc. Acad. IX, p. 75. 



With this genus commences a series of genera in which the antennae are longer than 

 the head and thorax, the outer joints not being transverse but more or less triangular and 

 closely articulated. This form is somewhat similar to that seen in many Ilelopides, and 

 it may be considered doubtful whether these genera (excepting llhinandrus) should not 

 enter that tribe or form a new one closely allied to it. The vestiture of the tarsi of these 

 genera, with the exception noted, is intermediate between the previous group of genera 

 and the Tenebriones which follow. In two genera the males have the anterior tarsi 

 slightly dilated. 



The mentum of Glyptotus is small, rhomboidal, narrowing behind, very prominent at 

 middle, and with prominent angles ; supported on a very narrow gular peduncle. The 

 eyes are larger on the front than other of our genera. On each side of the head above 



AMI! HI. PHILOSO. SOC VOL. XIV. — 86 



