THE MYCETOPHILID.E. 



II. Abdomen with six segments. 



a. Hind vein forked. 



l>. Fork short. delosia. 



bb. Fork long. Leia. 



aa. Hind vein not forked. 



b. Middle discoidal forked. Aoie/nia. 

 bb. Middle discoidal not forked. Azana. 



V). Three ocelli : one on the inner border of 



each eye ; third in the middle of the 



fore front. 

 a. Costal vein extending much beyond 



the tip of the cubital vein. 

 c. Two ocelli : one on the inner border of 



each eye. The third either in a pit 



and scarcely noticeable or absent. 



a. Base of fourth hind areolet nearly in a 



transverse line with that of the second 



hind areolet. Mycdophila. 



b. Base of fourth hind areolet much more 



distant from base of wing than is the 



base of second hind areolet. Dynatoso)na. 



c. Base of fourth hind areolet much 



nearer to the base of wing than is 



the base of the second hind areolet. Cordyla. 



b. Petiole of second hind areolet long. Exechia. 

 bb. Petiole of second hind areolet short. Mycothera. 

 aaa. No fourth hind areolet. 



/'. Fore cubital areolet moderately broad. Zygomyia. 

 bb. Fore cubital areolet very narrow. Sceptonia. 



c. Hind vein not forked. 



a. Base of fourth hind areolet in a trans 



verse line with that of the second. Doiosut. 



aa. Base of fourth hind areolet more dis- 

 tant from base of wing than is base 

 of the second hind areolet. Anatella. 



b. Costal extending a little beyond the 



cubital. Phronia. 



c. Costal not extending beyond tip of 



cubital. 

 a. Base of fourth hind areolet a little 

 nearer base of wing than is the base 

 of second hind areolet. 



