342 



NORTH AMERICAN DIPTERA 



Chloropidce II.— 14, Cetema hypocera; 15, Oscinella varipalpus ; 16. Parectecephala ; 17, 

 Meromyza americana, hind leg: 18, Chloropisca variceps, hind tibia; 19, Ceratobarys pulophus; 

 20, Oscinella tripunctata; 21, Cetema, middle tibia; 22, Oscinella magnipalpoides ; 23, Chloro- 

 pisca. 



