TRICHOPRIA TARAN1V0RA FOUTS IN MASSA- 
CHUSETTS (HYMENOPTERA, 
DIAPRIIDiE) 
By Normax S. Bailey 
Biological Laboratories, Cambridge, Massachusetts 
In the course of field investigations into the life his- 
tory of the Saltmarsh Greenhead, Tabanus nigrovittatus 
Macquart, being carried out for the state of Massachu- 
setts, two pupae of that species were found. They were 
located in a pile of drift composed chiefly of coarse Spar- 
tina straw and the remains of other salt marsh plants that 
had accumulated on a ditch bank near the edge of the 
marsh. The pupae were discovered on August 9, 1946, on 
the Pine Island Marsh in Newbury (Essex County). One 
was of the usual coloration, but the other was decidedly 
blackened and appeared unhealthy. Both were kept in 
small vials with a bit of the debris. A male horsefly 
emerged from the sound pupa and on August fourteenth 
a score of minute parasitic wasps came out of the second. 
These were kindly determined for me by Mr. C. F. W. 
Muesebeck of the U.S.D.A. Bureau of Entomology and 
Plant Quarantine as Trichopria tabanivora Fouts of the 
Proctotrypid family Diapriidse. 
A subsequent search of the literature failed to reveal 
any record of the species since those originally reported 
by Cameron. 1 Segal repeated Cameron’s record in his 
paper on the genus Chrysops 2 Prof. Cameron raised 98 
from a pupa of Chrysops mitis O.S. taken at Saskatoon 
and 112 from a pupa of Tabanus reinwar dtii Weid. col- 
lected in Maple Creek, Saskatchewan. Fouts’ description 
of the species was published with this data. 1 
This note indicates another Tabanid host species, a 
very different habitat, and a notable extension of range 
for the parasite. Furthermore, as far as the writer has 
been able to discover, these are the only known records 
of pupal parasites of Tabanidae. 
Six specimens of the series were sent to Mr. Muesebeck 
as the Bureau of Entomology collection contained only 
one paratype ; twelve are in the Museum of Comparative 
Zoology. 
1 Cameron, A. E., Bull. Ent. Res., Vol. 17, Pt. 1, 1-42, 1926. 
2 Segal, Bernard, N. Y. Ent. Soc. Jour., Vol. 44, 51-78, 1936. 
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