SYNOPSIS OF NORTH AMERICAN SYRPHID^. 173 



Eristalis hortorum. (Plate VII, fig. 10.) 



Musca surmamensis Degeer, vi, 145; tab. xxix, fig. 1. , 



Syrphus hortorum Fabricins, Syst. Eut., 7()4, 11; Ent. Syst., iv, 286, 29. 

 Eristalis horiorttm Fabricius, Syst. Antl., 236, 16 ; Wiedemaun, Auss. Zw. Iqs., 

 ii, 169. 

 Habitat. — West ludies ! 



S . Length. 12°^'". Antennre orange-yellow, arista bare. Face and 

 front orange yellow, thickly covered with yellow pollen and pile ; face 

 with a shining yellowish red stripe, not very broad; cheeks with a 

 shining black stripe. Eyes pilose, contiguous. Thoracic dorsum black, 

 shiningbehiud ; front margin grayish pollinose, separated by ablackband 

 from the rather slender yellowish grayish band on the suture; in front 

 of the scntellum rather broadly yellowish-grayish pollinose, separated, 

 or nearly so, from a similarly colored spot along the post-alar callus. 

 Pleurne thickly white pollinose below, above with golden yellow pile. 

 Scutellum wholly yellowish-red. Second segment of abdomen on each 

 side with a large yellowish-red triangle, broadly separated by opaque 

 black, wliich extends out narrowly nearly to the lateral margin behind; 

 posterior margin yellow; pile behind black, elsewhere yellow. Third 

 segment wholly shining, with black pile, except ou the lateral margins; 

 fifth segment shining metallic, with golden-yellow pile, posterior margin 

 yellow, and just before it a narrow transverse opaque black fascia. 

 Hypopygium wholly shining black, with golden -yellow pile. Legs yel- 

 lowish-red, base of four front tibiae light yellow; hind femora consid- 

 erably thickened, hind tibiae compressed, in front and behind with a 

 fringe of black pile. Wings on the posterior portion hyaline, in front on 

 the basal portion yellow, from before the cross-veins to near the tip and 

 beyond the middle dark brown. 



Four specimens, San Domingo (G. F. Frazar). 



Eristalis atrimanus. 



Eristalis atrimanus Loew, Centur., vi, 62. 



Habitat. — Cuba (Lw.), San Domingo! 



^. Length, 12'"'". Black, opaque. Eyes pilose, broadly contiguous. 

 Face thickly clothed with yellowish-white pollen and pile, median stripe 

 and the cheeks bare, black and shining. Antennae blackish, arista 

 bare. Frontal triangle black, shining in the middle and clothed with 

 black pile, along the edge narrowly white pollinose. Dorsum of thorax 

 on the anterior margin cinerescent, across the suture with a trans- 

 verse, yellowish- white pollinose band; anterior part of the dorsum with 

 yellow pile, posterior part with black pile. Scutellum ochraceous yellow ; 

 pile chiefly yellow, the remainder black. First abdominal segment black, 

 the lateral angles yellow ; second, with two large yellow spots touching 

 the front margin in their whole length, rather narrowly separated in the 

 middle and extending on the sides nearly to the hind margin, their 

 inner ends convex from the front border of the segment ; the black is 



