22 
[February 
Psyche 
Pulidphora venata Aldrich 
Trans. Entom Soc. London, p. 436 (1896) (Phora). 
Brues. Trans. Amer. Entom. Soc., vol. 29, p. 382 (1903). 
(PachyneureUa) 
Brues. Bull. Wisconsin Nat. Hist. Soc., vol. 12, p. 142 (1915) 
I cannot distinguish a series of females taken at Espia, Rio 
Bopi, Bolivia from the West Indian form. Dr. Mann’s specimens 
were attracted to masses of old cheese that had been abandoned 
by the expedition. A number of others in my collection from 
Grenada, B. W. I. were similarly trapped in jars containing 
chicken bones to which I found them attracted in great numbers. 
THE PROBABLE OCCURRENCE OF PARTHENOGENE- 
SIS IN OCHTHIPHILA POLY STIGMA. 
(DIPTERA) 
By a. H. Sturtevant, New York City. 
A total of 68 living specimens of Ochthiphila polystigma 
Meigen (one of the Ochthiphilinae. a subfamily included among 
the Acalypterate Diptera) was examined between August 23 
and September 30, 1922. All were females; and there is no 
possibility that the males were found but not recognized as 
belonging to this species, since during that period no other 
member of the genus was taken. With the exception of a single 
female belonging to an apparently undescribed genus, the only 
other members of the subfamily Ochthiphilinae taken belonged to 
the very different genus Leucopis, and here both sexes were 
found. Eleven of the 0. polystigma females were dissected, and 
three more were fixed and sectioned. In none of these was any 
trace of sperm found. I was during this time making a com- 
parative study of the structure of the internal reproductive 
organs of the females of all the Acalypterae, and was thus in a 
position to know how and where to look for sperm. It is safe to 
