Norman S. Bailey.
Trichopria tabanivora Fouts in Massachusetts (Hymenoptera, Diapriidae).
Psyche 54(2):142, 1947.

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TRICHOPRIA TABANIVORA FOUTS IN MASSA-
CHUSETTS (HYMENOPTERA,
DIAPRIIDB)
BY NORMAN S. BAILEY
Biological Laboratories, Cambridge, Massachusetts In the course of field investigations into the life his- tory of the Saltmarsh Greenhead, Tabamus nigrouittatus Macquart, being carried out for the state of Massachu- setts, two pupas 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 pupas 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 tabaniuora 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.* Segal repeated Cameron's record in his paper on the genus Chry~ops.~ Prof. Cameron raised 98 from a pupa of Chrysops mitis 0.8. taken at Saskatoon and 112 from a pupa of Tabanus reinwardtii Weld. col- lected in Maple Creek, Saskatchewan. Fouts ' description å´o the species was published with this data.' 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 Tabanidse.
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, IT. Y. Ent. Soc. Jour., Vol. 44, 51-78, 1936. 142
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