72 



THE REPORT OF THE 



No. 19 



draining what nutriment they could find there, spun their cocoons and went into the pupal 

 stage. In due time the flies appeared. I am indebted to that prince of Hymenopterists, Dr. 

 W. H. Ashmead, of Washington, for the identification of the species — it is Euplectrus frontalis, 

 Howard. 



V^' 



The caterpillars of the beauti- 

 ful Gelechian of the White Aster live 

 in hollow galls, in the stems of that 

 plant — one caterpillar in a gall. A 

 small Braconid, Fig. 29, — {Bracoti, 

 furtivns, Fyles) detects the hermit 

 in his dwelling, inserts her ovipositor 

 and drops a few eggs into the chamler. 

 These eggs soon hatch ; and the little 

 larviB that come from them (Fig. 30) 



Fig. 30. Bracon furlivus larva, 

 greatly magnified, (original). 



attach themselves to the cater|allar 

 and exhaust its life's juices. They 

 Pig. 2!). Bracon furtivus, greatly magnifled, (original). spin their COCOOns within the gall; 



and the flies from them appear in the spring of the following year. 



Notice the form of these sucking larviij (Fig. 30). 



ecs=^. 



Fig. 31. Trychosis tunicula-rubra, greatly magnified, (original). 



