1 66 UNIVERSITY OF COLORADO STUDIES 



Fam. NymphalidcR. 

 Subf. NymphalincE. 5 species, of as many genera, all extinct. * 

 Subf. LibytheincB. 2 species, of two genera, both extinct. 

 PapilionidcR, s. f. Pierince. i species, of an extinct genus. 



Heterocera (moths). "Perhaps 8 species;" one has been described by Scudder, 

 and is referred, with doubt, to the modern genus Psecadia. I have examined 

 a small species, probably one of the Elachistidce, collected by Scudder. 



DiPTERA (54 described; many more found) 

 Culicidce, Chironomida. "Abundant." 

 TipulidcE. 51 species described by Scudder; they belong to 15 genera, of which 



8 are extinct. No less than 15 species are referred to the modern genus 



Tipula. 

 Mycetophilidce. "Probably 20 or 30 species." One has been published, typical 



of an extinct genus, Mycetophcstus, Scudder. 

 Bibionidce. Very abundant in individuals, but apparently few species. 

 Stratiomyidcs. "2 or 3 species." 

 HirmoneuridcB. One has been described, representing an extinct genus, Palem- 



bolus Scudd. Others belong here or to Mydasidce. 

 Asilid(B, Therevidce. Quite numerous. 

 Bombyliidce. "Certainly 6 or 8 species." 

 Syrphida. Numerous. Discussed by Dr. Williston. 

 Empida. Numerous. 

 Ortalida. 3 or 4 species. 



(EstridcB. One species described, belonging to an extinct genus, Paloestrus Scud. 

 Muscidce and allies. Very many. 



Orthoptera (24 species) 



Blattidce. 2 species, referred to living genera. 



Forficulidce. 10 species, belonging to a single extinct genus, Labiduromma Scudd. 



PhasniidcB. One species, of an existing genus. 



Acridiidce. 



Subf. CEdipodincB. 3 species, including two extinct genera, and the modern 



genus (Edipoda, here only used in the old and general sense. 

 Subf. TruxalincE. 3 species, two of them belonging to an extinct genus, 

 the third referred quite provisionally to a modern genus. Tyrbula multi- 

 spinosa Scudd., described from Green River, Wyoming, is recorded from 

 Florissant on the strength of a fragmentary specimen. As the insects of the 

 Green River deposits are in general quite distinct from those of Florissant, 

 the identity must be considered very doubtful. 



LocustidcB. 5 species, all of different genera, and including four subfamilies. One 

 genus is extinct; two others are quite provisionally placed in modern genera. 



