724 T. D. A. COCKERELL 



Width of first posterior cell on outer margin of wing 288 



Discal cell on first basal 1,360 



Discal cell on first posterior 592 



Second basal on discal 240 



Second basal on fourth posterior 160 



Anal cell on wing margin 400 



Miocene shales of Florissant, Wilson Ranch (Wickham). The 

 remarkably numerous and diversified Florissant BombyKidae still 



fail to include any Anthracinae. 

 Probably, as parasites, these 

 BombyHids took the place of 

 the Tachinidae, which were rare 

 if not wholly absent. 



^"' ^"^^ ^ Asilus peritulus Cockerell 



Wilson Ranch (Wickham). 



A wing, about 11^ mm. long. 



Fig. 11.— Protolomaiia antiqua, apex „. 1 j • r^ ^ ^^ 



. . •i J 1- Htrmoneura melanden Cockerell 



01 wmg. 



Wilson Ranch (Wickham) . 

 Total length 19 mm.; the abdomen long and tapering. 



Syrphus willistoni Cockerell 

 Wilson Ranch (Wickham). Length about io| mm.; wing a 

 little over 8^. Other specimens which I have referred to this species 

 are considerably smaller; I believe that there are two species of this 

 type, but at present I cannot satisfactorily separate them. 



