MKLOI1U-: RHIPIPllOlilD^E. 117 



rugae. Body of the single specimen preserved mi ;i side view so that it is 

 impossible to suv how much broader the elytra are at their base than the 

 prothorax, but they have the appearance of being' somewhat broader: there 

 are taint signs mi them <>t' an exceedingly shallow, not very dense, and 

 uniform punctuation, and, in places, of short hairs arising from the puncta. 

 Legs very slender and constructed as in (T. nihihnnni Say. 



Length, I! mm.: breadth, 2 mm. 



The form of the prothorax is very unlike Gnathium, but I find no 

 other genus to which it is so nearly allied at all other points. 



Florissant, Colorado; one specimen, No. 7493. 



Only four fossil species of this family are known, belonging to three 

 genera, all but one of them found in the Old World. 



RH1PIPHOKUS Fabricius. 



A north temperate genus with relatively few species, most of them 

 found in North America. A single fossil has been described from Colorado 

 and the genus has been recognized in amber. 



RHIPIPHORUS GEIKIEI. 



Rkipiphoru* ij'iki'' Sc-udcl.. Tort. Ins. N. A.. 48^-483, pi. ^7, tig. 1 (1890). 

 Florissant, Colorado. 



