378 CHARLES T. BRUES. 



Twenty-nine specimens. From Dr. Hough, one, New Bedford, 

 Mass. ; Mr. Johnson, five, Montgomery Co., Pa., May 26, 1895, 

 and six, Natrona, Pa., July 13-30, 1895; University of Kansas, 

 two, Lawrence, Ivans.; Prof. Aldrich, one, Brookings, S. D. ; four, 

 Lawrence, Kans. ; Dr. Wheeler, two, Chicago, July, 1895-96; one, 

 Battle Creek, Mich. ; one, New York City, May (Brues) ; three, 

 A.ustin, Tex., and four, Chicago (Melander). 



Trineura velutina Meig. (Plate viii, fig. 51.) 

 Meigen, Syst. Beschr. vi, 224, 38. 

 Like aterrima, but a little larger. In both sexes the front tarsi are distinctly 

 flattened and enlarged, this is especially noticeable in the female. The costal 

 vein reaches a little beyond the middle of the wing, and the third vein is not so 

 far from the costa at its base as in aterrima. Costal cilia long and fine, but not 

 very close. Hind tibia? with one external bristle; middle tibiae with five to 

 seveti bristles on the hind side in the male and two to three in the female, 

 besides one or two bristles on outer side before the middle. 



This common European species has never before been recorded 

 from America. The two species are very closely allied, but easily 

 separable, by the characters given in the table. Velutina has the 

 more western range, occurring from California east as far as Massa- 

 chusetts. Aterrima occurs also in the east, but I have seen no speci- 

 mens from further west than Kansas and Texas. 



Thirty eight specimens. Eight, Leland Stanford University, Cal. ; 

 nineteen, Moscow, Idaho (Aldrich); four, Los Angeles Co , Cal. ; 

 three, New Bedford, Mass. (Hough); two, Douglas Co., Kans. 

 (University of Kansas), and one from Battle Creek, Mich. 



Trineura inoiitaiia sp. nov. (Plate vii, figs. 52, 53.) 

 Male. Length 1.8-3.5 mm. Wholly dull, opaque velvety black, except coxse, 

 legs, hypopygium and several spots on the pleura' which are more or less shining. 

 Front about one-fourth the width of the head, with the normal bristles, the pair 

 of bristles below the ocelli not so close to the eye margin as the others; lower 

 part of front on each side of the median line with a vertical row of about five 

 small bristles which decrease in size upward. Antennae small, oval, with dorsal 

 arista ; palpi small, bristly only at the tips. Legs black, except the front, which 

 are brownish yellow. Front tarsi much widened and flattened, wider than their 

 tibiae, second and following joints as wide as or wider than long; middle tibia 

 with five or six (usually five) bristles on hind side, on outer side with a single 

 bristle; hind tibise with a single basal external bristle. Wings hyaline, often 

 tinged with yellowish ; costal vein reaching well beyond the middle of the wing, 

 its cilia very short and fine ; fourth vein sharply curved at base, straight at apex, 

 ending just before tiie wing tip. 



Female. Differs by its wider front (one-third the width of the head) and by 

 having only two bristles on the hind side of the middle tibiae. The front tarsi 

 are also a trifle wider than in the male. 



