164 UNIVERSITY OF COLORADO STUDIES 



The family has three other genera in the Green River beds of Wyoming, 

 but our genus is not present in those beds, so far as known. 



MOLLUSCA (i recognizable species) 



A few freshwater Mollusca have been found, not differing in any striking char- 

 acters from those inhabiting Colorado today. Planorhis florissantensis 

 Ckll. has recently been described; the other forms have not yet been met 

 with in a condition for description. It is much regretted that no land shells 

 have yet been discovered. 



INSECTS 



CoLEOPTERA (213 species described, of over 400 found) 



CarahidcR. Scudder reports 25 species. 



DytiscidcB, etc. (water-beetles). Five species. 



StaphylinidcB. Thirty-five species. 



NitidulidcB. Three species. 



ByrrhidcR. Represented by a remarkable extinct genus, Nosotetocus Scudd., 



with three species, and by four referred to modern genera. 

 SilphidcB, Histeridce, PtinidcB, Coccinellidce. "From 2 to 10 species each." Cleridce, 



ParnidcB and DermestidxB, each one species. 

 Telephorida. One species {Chauliognathus pristinus Scudd.), referred to a modern 



genus. 

 ScarahcBidcB. Nearly 30 species. 

 Cucujida, two. 

 BuprestidcB. "Nearly as many" as in the Scarabceidce. One (Chrysobothris hay- 



deni Scudd.) has been described, and is placed in a living genus. 

 ElateridcB. "Over forty [species] have been separated." 

 Meloidcs, Mordellidce, MalacodermidcB. "About forty species," i. e., of these groups 



together. 

 Rhipiphoridm. Rhipiphorus geikiei Scudd.; the genus modern. 

 CerambycidcB. "Thirty or more specimens, representing more than half as many 



species. Parolamia rudis Scudd., belonging to an extinct genus, has been 



described. 

 ChrysomelidcB. "About two dozen species." One referred to an extinct genus, 



Oryctoscirtetes Scudder. 

 TenebrionidcB. "Nearly 20 species." 

 BruchidcB. "A dozen or more species." The only one described is placed in the 



modern genus Spermophagus. 

 Rhynchophora. The species of this great group, commonly known as weevils, 



have been worked up by Mr. Scudder, with the following results: 



