302 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 90 



central bristles; the second segment of the antenna and the scutellum 

 are black in most part. Length, 0-12 mm. 



Placed provisionally with this species is a series of approximately 

 200 flies bred at the Melrose Highlands laboratory from AlsophUa 

 'pometaria Harris and other species of Geometridae, All these flies 

 are much smaller in size than the type but there does not appear to 

 be any other appreciable difference. Length, 6-10 mm. 



In the United Slates National Museum there are specimens from 

 New Jersey, 1924; J. F. King; Hartford, Conn., May 9, 1916, I. N. 

 Gabrielson ; ex AlsophiJ-a fometa-ria^ Quaintance No. 16610, Walling- 

 ford, Conn., May 1, 1920, B. A. Porter; Browns Mills, N. J., July 9, 

 1926, H. G. Hallock. Also there are one male from Minot, N. Dak., 

 June 18, 1918; one male from Lafayette, N. Dak., May 25, 1916; and 

 one female from Big Stone City, S. Dak., June 8, 1918, Aid rich. 



Hosts. — Catocala mieronym'pha form jratercyida Grote and Robin- 

 son (G. M. L. 11707 L4) ; Gr-optoUtha antennafa Walker (G. M. L. 

 12161 E14) ; Porthetrla dispar Linnaeus (G. M. L. 9427) ; Ahophila 

 'pometaria Harris (G. M. L. 10076 and sul>nos.) ; Phigalia titca Cramer 

 (G. M. L. 10007 C) ; Physostegania ptiMulana Guene-e (G. M. L. 

 10016 B) ; Eranrih tmaria Harris (G. M. L. 10018 S3). All recorded 

 at the Melrose Highlands laboratory by J. V. Schaffner, Jr., et al. 



TACHINOMYIA DAKOTENSIS. new species 



This species comes nearest to nigricans^ particularly to the small 

 forms reared from AlsophUa poTiietar^ia Harris, from which it differs 

 in having discul abdominal bristles, brownish legs, and more broadly 

 curved anal forceps. 



Male. — Hind tibiae inwardly with short villosity, the villi scarcely 

 the tibial width in length; lobes of fifth sternite yellowish brown, 

 without basal flange, their inner edges smooth; fourth sternite con- 

 vexly produced; thorax and abdomen black, thinly gray pollinose 

 with strong brownish cast; fourth segment not densely gray polli- 

 nose but mostly mottled with thin grayish pollen, the posterior border 

 black, faintly brownish at sides; second antennal segment and most 

 of scutellum brown; genital segments orange-red; anal forceps 

 sparsely pilose behind, their apices strongly curved forward as in 

 aoosta\ three dorsocentrals ; facial ridges weakly bristled; vibrissae 

 at or but slightly above oral margin; third antennal segment three 

 times the length of second ; parafacialia at narrowest part compared 

 w'ith distance between vibrissae 5.3:14.6 (average of six); cheeks 

 one-fifth the eye height, with pale hairs; face and front concolorous, 

 silvery gray pollinose with faint yellowish cast; third segment of 

 abdomen with one pair of discal bristles; legs brownish black. 

 Length, 9 mm. 



