PREDACEOUS ENEMIES. 



131 



in a report of the Department of Agriculture, 1 that he reared Syrphus 

 americanus from Macro siplium granaria. 



Fig. 43.— Syrphus americanus, whose larva destroys the spring grain-aphis: a, Female fly; 5, second 

 abdominal segment of male. Enlarged. (Original.) 



SpTixrophoria cylindrica Say (fig. 45) was collected from wheat 

 fields at Hiawatha, Kans., in 1907, by the junior author and was also 



Fig. 44—Eupcodcs volucris, whose larvae were the most abundant and useful in the fields where the spring 

 grain-aphis was most abundant in the Southwest during the spring of 1907. a, Female fly; b, abdomen 

 of male; c, hypopygium of male. Enlarged. (Original.) 



reared from Toxoptera material sent in by Mr. Haynsworth from 

 Sumter, S. C, the same year. Mr. G. G. Ainslie reared it from 



* Report of the Entomologist, U. S. Dept. of Agr. for 1889, p. 351. 



