XI/VIII. Family PHYCODROMID^E. 



Mesonotum, scutellum and abdomen flat. Front bristly; 

 cheeks and face bristly, the vibrissas indistinctly differ- 

 entiated. Legs stout, all the tibiae spurred and with a 

 preapical bristle on the outer side ; metatarsi not abbre- 

 viated; terminal joint of all the tarsi incrassate and with 

 stout claws. Venation complete; auxiliary vein distinct 

 in its entire course; costa without bristles; basal cells 

 not very small. 



Fijf. 126. Phycodromidse. Ccelopa, wing, head, and front tibiae 



and tarsus of male. 



But two genera of this family are known from North 

 America. Species of the genus Ccelopa are observed, 

 often in abundance, among sea-weeds thrown up by 

 the waves along the sea-shore. Recently Mr. Coquillett 

 has added another genus, Omomyia, from California (Ca- 

 nadian Entomologist, 1907, p. 76), differing from Ccelopa 

 in having the scutellum nearly one-half as long as the 

 mesonotum, distally subtruncated, bare, and with two 

 pairs of lateral bristles. The habits of the type species 

 (O. hirsida) are not given. 



31/ 



