174 BULLETIN 31, UNITED STATES NATIONAL MUSEUM. 



wholly opaque, extending narrowly to tbe lateral margins; third seg- 

 ment with two large yellow spots, leaving the bhick similar to that of 

 the preceding segment, but extending a little more broadly to the lateral 

 margins, and more rounded in front ; fourth segment opaque black, with 

 a slender, narrowly interrupted, metallic cross-band ; hind margins of 

 the second, third, and fourth segments yellow ; hypopygium shining 

 black, with yellow pile ; elsewhere the pile on tlie black j)ortions is black, 

 on the yellow parts yellow. Legs black ; tip of four front femora, basal 

 third of four front tibire, and narrow base of hind tibiae, yellow; hind 

 femora but slightly thickened. Wings hyaline. 



9 . Front with a broad median black stripe, entire, black pilose, on the 

 sides concealed beneath yellowish pollen and whitish pile. Second 

 segment of the abdomeu with the yellow not extending so far backward 

 and more narrowly separated ; third segment wholly without yellow, 

 on each side with a shining spot. 



Three males and one female, San Domingo (G. F. Frazar). I believe 

 my identification of this species is correct, but I do not observe any 

 polliuose spot near the post-alar callus as Loew describes. 



Eristalis pilosus. 



Eristalia jyilosus Loew, Centnr., vi, 70. 



Habitat. — Greenland (Lw.)! 



5,9. Length, 11 to 13'"'^. Black, thickly clothed with long yellow 

 pile; eyes black pilose; antennse black, arista bare; fiice black; thorax 

 unicolorous, opaque ; scutellum luteous; first two abdominal segments 

 opaque; the second ou each side with a dilutely lutescent spot; third 

 black, with two opaque spots, confluent in an abbreviated fascia; two 

 ultimate segments bronze-black, shining, with a minute triangular spot 

 opaque ; pile of the dorsum reddish, on the sides of the middle black, 

 remainder yellow ; wings pure hyaline, veins fuscous-black, in the fe- 

 male with a blackish spot. 



Black, clothed with long yellow pile, sometimes lighter. Head 

 black, yellow pilose ; face of the same color, and, except the very broad 

 median vStripe, is thinly covered with yellowish pollen; eyes in both 

 sexes black pilose, in the male contiguous, in the female broadly sepa- 

 rated. Antennse black, arista bare. Thorax unicolorous, opaque; pile 

 wholly yellow. Scutellum dilutely lutescent, very thicklj- yellow pilose. 

 First two segments of the abdomen opaque; second on each side with 

 a subrotund spot, very dilutely lutescent, on the posterior margin 

 smooth. Third segment shining, with two opaque spots, forming an 

 abbreviated fascia. The remaining segments are bronze-black, shining, 

 except a minute triangular spot, situated near the margin of the fourth 

 segment. Pile of the abdomen yellow, in the middle of the abdomen 

 reddish, near the tip sometimes pallid, on the posterior angles of the sec- 

 ond segment, and the lateral margins of the third segment, except the 

 angles, black. Legs black, black pilose: hind femora slender, narrow 



