TIIK SILKKN KUNtiUS I'.KKTU'IS. 571 



diverging; from the inner margin of the hind coxal cavities; first 

 joint of hind tarsi as long as the next two combined; eyes with 

 coarse facets. II. CKYPTOPHILUS. 



W). Front coxal cavities broadly and completely open behind; basal seg- 

 ments of abdomen variable in length. 

 c. Tarsi with third joint strongly and second joint less strongly lobed 



beneath, the fourth joint very small : 5-jointed in both sexes. 

 <1. Body distinctly, rather densely pubescent, closely and irregularly 

 punctured; ninth joint, of antenna 1 very little wider than 

 eighth; sides of H.vlra not margined at base ; prosternal process 

 acute at tip. III. TELMATOPHILU.S. 



dfl. Body sparsely and feebly pubescent; ninth antennal joint as 

 wide as the tenth; sides of elytra margined at base; prosternal 

 process truncate at tip. 



e. Punctures of elytra in rows ; thorax transversely impressed at 



base. IV. LOBKBUS. 



ee. Punctures of elytra few and irregularly distributed ; thorax 



not impressed at base. V. TOMARUS. 



cc. Tarsi filiform, simple, and never lobed beneath, 5-jointed in the 



females, the hind ones 4-jointed in the males ; sides of elytra 



never margined at base and elytral punctiires never in rows. 



f. Mesosternnm deeply emarginate, receiving the prosternum ; eyes 



situated in front of base of head, small, not prominent; body 



large, for the family, oblong, densely clothed with yellow hair. 



VI. ANTHEROPHAGT T S. 



/'/. Mesosternum not emarginate; eyes situated at base of head, con- 

 vex, prominent. 



g. Sides of thorax with three undulations at the apex and near 

 apical and basal thirds the apical angles not more thick- 

 ened: body short, broadly oval and convex, with long hairy 

 covering. VII. CROSIMUS. 



////. Sides of thorax not undulated. 



li. Thorax with apical angles thickened and obliquely truncate, 

 the lateral edges even except a minute tooth near the mid- 

 dle; basal fovete very small and feeble. 



VIII. CRYPTOPHAGUS. 

 lili. Thorax with apical angles not thickened, the lateral edges 



serrulate with very fine teeth. 



i. Body oval, convex ; thorax with a distinct transverse basal 



groove. IX. HENOTICUS. 



//'. Body oblong, parallel, rather strongly depressed; thorax 



without a basal groove, but with two small distinct basal 



fovere. X. PTERYNGIUM. 



I. DIPLOCCELUS G-uer. 1846. (Gr., "double + cavity. ") 



This genus, formerly placed in the next family, comprises small 

 elongate or oblong* subdeprrssed beetles, most easily distinguished by 

 the fine raised lines on the sides' of the disk of thorax. The anten- 



