112 TERTIARY COLEOPTERA OF NORTH AMERICA. 



well-rounded, somewhat convex sides and front lateral angles, the anterior 

 marghi considerably concave; the posterior lateral angles are rectangular 

 and there is apparently a median furrow on the posterior half, although the 

 appearance may be due to crushing. The surface of the prothorax, and 

 also of the elytra, is very delicately granulate ; the elytra are also furnished 

 very indistinctly with several (five or six?) longitudinal ridges, straight and 

 equidistant. The fore femora are swollen as well as the hind pair, but the 

 middle femora are concealed. Both middle and hind tarsi have the charac- 

 ters mentioned in the description of the genus and are fully fom'-fifths as 

 long as their tibiae. 



Length, 5 mm.; breadth, 2.25 mm.; breadth of head, 1.25 mm.; of 

 prothorax, 1.8 mm.; length of prothorax, 0.92 mm.; of elytra, 3 mm.; of 

 middle tibise, 1.34 mm.; of middle tarsi, 112 mm.; of middle claws, 0.18 

 mm.; of hind femora, 1.32 mm.; of hind tibiae, 1.4 mm.; width of hind 

 femora, 0.48 mm.; of hind tibise, 0.18 mm,; length of hind tarsi, 1.14 mm.; 

 of first joint, 0.32 mm.; of fourth joint (excluding claws), 0.48 mm.; of 

 claws, 0.22 mm.; breadth of fourth joint at tip, 0.1 mm. 



Florissant, Colorado; one specimen, No. 14689. 



MICRORHOPALA Baly. 



A North American genus with about a dozen species. A single fossil 

 species is indicated from British Columbia. 



MiCRORHOPALA Sp. 

 Micn^orlwpala sp. Chagn., Nat. Canad., XXII, 109 (1895). 

 Vancouver Island, British Columbia. 



Ten species of this family have been found in the early Tertiaries, 

 belonging to four genera. 



SPERMOPHAGUS Schonherr. 



A cosmopolitan genus with a moderate number of species, of which a 

 single one is found in the United States. One fossil species occurs in 

 Colorado. 



