48 C. H. TYLER TOWNSEND. 



In my specimen the antenme are, however, rather yellowish brown 

 than black, and the wings are clear hyaline. The yellow markings 

 of third segment are sub-semicircular and separated, touching the 

 front margin ; and the shining, interrupted band of fourth is not 

 widened laterally. 



49. EristaliN ba!i»tar<li Mcq. 



Washington, I). C, May 27. One male. Face and frontal tri- 

 angle light yellowish pollinose. No black pile on thorax ; reddish 

 yellow markings of third segment distinct, and similar smaller mark- 

 ings distinct on anterior angles of fourth segment. 



oO. Eristalis broiisi Williston. 



Hanover, N. H. (Weed). Six males and three females. Fort 

 Collins, Colorado (Gillette), one male. The males all agree very 

 well with the descriptions. The C'olorado specimen has the yellow 

 of abdomen a little lighter. In the females the opaque black of 

 second segment widens out along the hind margin ; and the third 

 and fourth segments have an opaque black jiosterior border, con- 

 nected on third with the median anterior opaque spot by an opaque 

 line. The front is brassy pollinose, ratlier than reddish. Length 

 8-10 mm. 



Another female, from Orono, Me. (Harvey), has third segment 

 with the small opacpxe spot in front, fourth without ; second, third 

 and fourth rather widely whitish pollinose on hind border, the nar- 

 rower margin yellowish white. 



51. Eristalis <liini<liatus Wied. 



Washington, D. C, May 17-22. Two males, and one female; 

 first two antennal joints shining brownish in tlie one 9 . The front 

 of female has no median brown stripe, only a faint streak abbreviated 

 below. All my specimens have the yellowish spots on second seg- 

 ment distinct ; in one male those on the third segment also. 



.■j2. Eristalis flavipes var. melmio.^fimms Loew. 



Fort Collins, Colorado (CJillette). One female; on each side of 

 middle of second alxlominal segment the ground color is yellowish, 

 anterior to which the pile is yellowish. On third segment the same 

 spots occur, but are very faint and more reddish, and on and poste- 

 rior to them the pile is yellow, continued broadly on sides of fourth 

 segment ; middle tibire yellowish on basal half, the yellow hairs with 

 a few black on distal portions ; a faint brown cloud extends from 

 stigma to anterior and posterior cross-veins. 



