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



Wing with three or more cells ; a 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 



PAGE 



TiPULlD.E. II. 



Rhvphid^k. 6. 

 culicid.e. s. 



DiXID.E. lO. 



veins not forked - - . . . . Bibionid.e. zS. 



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



with forked veins from cell to edge 



MVCETOPHILID.B. 20. 



few veins only ; wing narrow, with no distinct cell Chironomid-B. to. 

 Wing with only few veins : the hintiniost forked - - . - Cecido.mvid.k 21. 



^Ving with hardly any veins, except on front edge - 



Si.MUi.iiD.E. 23. 



W^ing with many veins ; several forked 



PSYCHODID^. S. 



(5) 



