KEY TO SUB-ORDER I. MOSQUITO-LIKE DIPTERA. 



Wing with three or more cells : ;i V-shaped seam on chest point: 



wing long and narrow - 



no V-shaped seam ; wing broad 



Wing with two cells ; some of the veins from cell to edge forked : 



veins covered with scales 



veins not covered with scales 

 veins not forked 



PAGE 



Tipri.in.K. ii. 

 RnYpHin.E. 6. 



CULICID.E. S. 



DlXID.K. IO. 

 BlBIONID.-E. 2S. 



Wing with one cell ; with irregular net-like veins on the edge BLEPHAROCERID.. 20. 



with forked veins from cell to edge 



MYCETOPHILID.K. 20. 



few veins only ; wing narrow, with no distinct cell CHIROXOMID.K. 10. S 

 Wing with only few veins ; the hindmost forked - CECIDOMYID.K. 21. 



Wing with hardly any veins, except on front edge - 



Wing with many veins ; several forked 



SlMULIID.. 23. 



PSYCHODID.-E. S. 4: 



(5) 



