1910] Barbour — Life History of Ascodipteron 165 
Lake and was fairly plentiful flying up from the low bushes which 
surrounded the pond, there being no trees, but the females were 
crawling around probably due to the heavy body of the female, and 
very rare. 
? type, Attean Pond, Maine, October 3, 1909, in my collection. 
° cotypes, Attean Pond, Maine, October 3, 1909, distributed 
in the following collections: Boston Society of Natural History, 
William Reiff, G. H. Field, F. X. Williams, A. J. Crocker, Univer- 
sity Museum of Harvard College and ten in mine, also in Brooklyn 
Institute Coll. from Dr. Hulst, Maine. * cotypes, G. H. Field, 
William Reiff, and five in mine. 
Mr. Guy Lucas turned up this interesting species in Moosehead 
Lake region, northern Maine, and I recognized it as being new and 
was going to describe it as “lucasi’”’ when I took a trip to Brooklyn, 
N. Y., and saw my lucasi labelled rubiferaria Hulst from Maine. 
I looked up the literature and found Doctor Hulst never described 
this so I propose to keep it under the original name to avoid future 
controversy. 

A NOTE REGARDING THE LIFE HISTORY OF ASCODIPTERON. 
In a recent letter from my friend, Mr. F. Muir, he announces the sending 
of a paper which embodies results of his studies regarding the life history 
of Ascodipteron; and as it may be some months before his report can be 
published, it seems wise to offer this short preliminary notice. Mr. Fred- 
erick Muir, while engaged in collecting insect parasites in the Dutch East 
Indies, has made the following observations regarding the life cycle of 
Ascodipteron: 
By the wings and the entire structure of the male, it proves to be very 
closely allied to the Streblide. The female is at first fully winged, but 
imbeds herself in the bat hosts, cuts off her wings and legs, and undergoes 
a post-imaginal metamorphosis which converts her into the flask-shaped 
grub originally described by Doctor Adensamer. This is brought about by 
the abdomen growing to an enormous extent, and completely covering the 
head and thorax. The proboscis of the female is greatly altered to enable 
her to penetrate the skin of the host, but its homology to the proboscis of 
the normal fly is perfectly clear. A more complete and detailed descrip- 
tion of this bizarre type will follow in a later number. 
Tuomas BARBOUR. 
