340 



NORTH AMERICAN DIPTERA 



ChloropidEe I.— 1, Dactylothyrea cuivinervis; 2, Chlorops sulphurea; 3. Chlorops; 4, 

 Meromyza aineiicana; 5. Hippclates collusor; 6. Cetcma hypocera; 7, Madiza; S. Pseudogaurax ; 

 9, Dicrsus; 10, Pseudogaurax; 11. Diplotoxa pulchripcs; 12, Ectecephala ; 13, Madiza. 



