250 Illinois State Laboratory of Natural History. 



Station B, and in March and April single examples oc- 

 curred. The imago has been taken by us also several times 

 between July 6 and 22, in Carroll, Bureau, and Kankakee 

 counties, upon various flowers. 



The larvae taken July 9 were placed in a dish of water 

 with Ceratophyllum, which the.y immediately began to 

 work upon, crawling through and over it, seeming to 

 browse upon the minute life which it bore. 



A pupa in a breeding-cage in company with pupae of 

 Odontomyia cincta was noted July 6 to have a round 

 hole in one side of the eleventh segment, and an example 

 of Smicra rufofemorata was in the cage. As some of the 

 Odontomyia pupae showed the same kind of holes, I 

 could not be sure which species it came from. In Europe 

 also, these larvae are parasitized by Smicra. 



The larva of this species is easily distinguished from 

 the Odontomyia larvae by its shape, by its dark ashy 

 color, and by the entire absence of the ventral hooks on 

 the two segments preceding the last. 



RECORD OF STRATIOMYFA NORMA FOR THE YEAR.* 



• See foot-note, p. 169. 



