156 



GUIDE TO CALIFORNIA INSECTS. 



Bibio hirtus Loew. 



nervosus Loew. 

 Dilophus occipitalis Coq. 



Scatopse notata (Linn). 

 Tipula notata — Scatopse. 



TIPULINA 



CECIDOMYID>E. 



One species, the hessian fly, Myetiola, is a very serions pest on wheat, but 

 not particularly so in this state. Other species feed as larvee on decaying 

 vegetable matter, and one of our species, Arthrocnodax, feeds on red spiders. 



Figure 167 Larva of a Mycetophilid. 

 Arthrocordax epiphila Felt. 



occidentalis Felt. 

 Cecidomyia destructor — Myetiola. 



radiatae S.&M. 

 Diplosis piniradiatse — Cecidomyia. 

 Myetiola destructor (Say). 



Fig-ure 168 Mycetophilid fly. 



MYCETOPHILiD>e. 



The larvae feed on decaying vegetable substances. 



lepida Joh. 



Figure 166 Venation 

 and related families. 



of Mycetophilidse 



Coq. 



Acnemia varipennis 

 Alodia bella Joh. 



delita Joh. 

 Coelosia flavicauda Win 



gracilis Joh. 



modesta Joh. 



pygophora Coq. 

 Cordyla neglecta Joh. 

 Dacosia obscura Coq. 

 Gnorista megorrhina O.S. 

 Leia lineola (Adams). 



striata (Wil.) 

 Mycomyia calcarata (Coq.) 



frequens — littoral is. 



littoralis Say. 



mendax Joh. 

 Bolitophila hybrlda Meig. 

 Mycetophila lenistrata Coq. 



nemoralis — Neuratelia. 



obscura — Dacosia. 



