378 



REVISION OF THE TKNEBRIONID^B OF AMERICA, 



A. oalifornica, oval, robust, piceous. Head broad, moderately convex, very densely and rather coarsely 

 punctured. Thorax transverse, nearly three times as broad as long, convex, densely and coarsely punctured and 

 fringed with long yellowish hairs; anteriorly emarginate, angles not, prominent; base rounded, angles obtuse; sides 

 strongly rounded, slightly narrower behind than in trout. Elytra- broadly oval, scarcely longer than broad, not 

 broader at base than the thorax; base feebly emarginate; sides fringed with long yellowish hairs; surface rather 

 densely, coarsely and very irregularly punctured. Under surface of body with few scattered punctures. Presternum 

 and legs with long yellow hairs. Body winged. 



Length .1G-.20 inch. 



As compared with the figure of A. sardoa, Gene, in Duval, pi. 70, fig. 350, our spe- 

 cies is more robust, with a shorter thorax and with the sides much more; strongly from the 

 apex to base, the hind angles being very obtuse. The punctures are denser and coarser. 



Occurs in Owens' Valley, Cab, and the adjacent regions of Nevada. 



TRIBE XXVII DIAPEEINL 



Body usually oval or rounded, sometimes elongate (Hypophlceus). Eyes prominent, 

 very feebly emarginate in front. Antenna 1 always with the outer joints thicker and per- 

 foliate. Mentum small, gular peduncle distinct. Anterior coxae sub-transverse ; middle 

 coxse with distinct trochantin. Legs slender; spurs small; tarsi pubescent. 



This tribe may be distinguished from those which precede by the very convex eyes, 

 more prominent than the sides of the front, and from the Bolitophagini by the gula not 

 being transversely sulcate. 



Our genera may be divided into the following groups: 

 Diaperes. Body broadly oval ; eyes distinctly emarginate in front; pygidium covered. 

 First joint of hind tarsi not longer than (he second. DIAPERIS. 



First joint of hind tarsi equal to second and third. HOPLO0EPHALA. 



hirst joint of hind tarsi longer than second and third. 



Epipleurse entire; intercoxal process of abdomen acute. 

 Mesosternum concave. 



Last joint of maxillary palpi broadly triangular, PLATYDEMA. 

 Last joint of maxillary palpi elongate triangular, 



outer side much longer. ALPHITOPHAGUS. 



Mesosternum prominent. LIODEMA. 



Epipleurtc short; intercoxal process of abdomen truncate. SCAPHIDEMA. 

 HypophlcBI. Body cylindrical; eyes distinctly emarginate in front; py- 

 gidium exposed. 

 (One genus in this group). HYPOPHLCEUS. 



PENTAPHYLLI. Body elongate oval; eyes not emarginate in front; py- 

 gidium covered. 

 Last five joints of antennae forming a loose club. pentaphyllus. 



