30 DEPARTME:CirT BULLETIN- 779. 



Telenomus ashmeadi in the natural control of C. sayi. Frequently 

 death does not occur until several hours, or even days, after the 

 parasite has left the body of its host, the host meanwhile remaining 

 inactive. 



Although eggs are deposited on the nymphs, no instances were ob- 

 served in which the larvae of G. fuliginosa completed their develop- 

 ment and issued before the host reached its adult stage. 



The seasonal history of G. fuliginosa corresponds very closely with 

 that of C. sayi and there are the same nuhiber of generations annually. 

 The adults are engaged actively in parasitizing C. sayi throughout 



Fig. 13. — Ocypterodes euchenor, a fly parasite of the grain-bug adult. Much enlarged. 



the period of activity of the host, extending from April to October 

 or November. They are most numerous during the months of July 

 and August, and at this time a dozen or more individuals have been 

 collected by a few sweeps of the net in fields that were heavily in- 

 fested with C. sayi. 



The parasite hibernates, in some instances at least, as a larva within 

 the body of its host. In February, 1916, during severe winter weather, 

 25 adults of C. sayi were collected from hibernation at French, N. Mex., 

 and placed in a heated room. They became active within a few hours 

 and 3 days later 2 larvae of G. fuliginosa issued. These larvae were 

 placed in a pupating cage and the resulting adults emerged 16 days 

 later. It is probable that the parasite also hibernates as a puparium 



