HABITS, ETC., OF HYLEMYIA GRISEA, FALL. 



17 



Some full-fed fly larvre were in 191 3 still found in brood 

 chambers as late as the third of September. They pupated 

 during the following night. These puparia and a few others 

 were taken to Edinburgh, and passed the winter in a small 

 flower-pot filled with sand, protected from dust by a muslin 

 cover, kept in a cool room, and from time to time watered. 

 From these puparia five flies of the same species as those 

 that haunt the bee colonies emerged in the first week of 

 June 1 914. One was a male ; the others, female. They were 

 fed on brown sugar and raw beef. They preferred the beef, 

 from which they completely sucked the juices. They showed 



Fig. I. — Adult female of //r/t-wv/V? .?t/5C(7. x 5. 



no inclination to pair, perhaps because they were kept too 

 much in the shade. At the end of about two weeks they 

 died. Two of the females were used for dissection. The 

 ovaries consisted of twelve ovarian tubes, six on each side of 

 the body. 



Specimens of the fly were sent to Dr Stein of Treptow, 

 who identified the species as Hylemyia grisea, and added the 

 information that " the larvae live in the nests of Hymenoptera." 



My figure i represents the female fly, of which I offer the 

 following description : — 



Body narrow, conical, 7J7 to S mm. long, with a wing-spread of 

 about twice that measurement. 



49 c 



