250 BULLETIN 31, UNITED STATES NATIONAL MUSEUM. 



over, of the thorax and abdomen are composed of very dense pollen, 

 and may be more or less effaced, whereas in Spilomyia they are of the 

 ground color. Properly speaking, these characters are not of more than 

 subgeneric value, as indeed they were so considered by Schiner. The 

 species are, like those of JSpilomyia, strikingly similar or identical with 

 the European ones. 



TABLE OF SPECIES. 



1. — Abdomen with three or four yellow pollinose crossbands of nearly equal 



width bombylans 



Abdomen broadly oval, with more than four cross-bands, of unequal width 2 



2. — The thorax has, in addition to the other spots, two separated ones on each side on 



the suture 5 



The thorax has, in addition to the other spots, only one, elongate spot on each 



side 3 



3. — Femora mostly yellow ; the distal part of the abdomen with broad yellow cross- 

 bands leaving but very narrow black cross-bands 4 



All, or at least the front, femora broadly black ; the black interrupted cross- 

 bands of distal portion of abdomen broader aequale 



4. — Scutellum, except the base, densely yellow pollinose pictuliim 



Scutellum, except the base, shining metallic excentricum 



5. — Second segment of abdomen with a broad anterior cross-band, distal segments 



with three transverse black spots altemans 



Second segment without anterior cross-band, distal segments with a broad inter- 

 rupted black cross-band ; pile of scutellum black venustum 



Temnostoma bombylans. (Plate XII, fig. 6.) 



MihHia homhijhins Fabricins, Syst. Antl., 189, 8; Panzer, Fauna, viii, 11 ; Meigen, 



Syst. Beschr., iii, 2:53, 6 ; Macquart, Hist. Nat. Dipt. 1, 534, 6. 

 Milesia Zetteratedtii Fallen, Syrph.,8, 1. 



Tevfinostomo hombtflans St. Fargeau and Serville, Encycl. Meth.,x, 518 

 Doros BahjraH Walker, List, etc., iii, 577. 

 Spilomyia homhylans Schiner, Fauna Austr., i, 365. 

 Temnostoma obscura Loew, Centur., v, 35. 

 Temnostoma Balyras Osten Sacken, Cat. Dipt., 138,253. 



Habitat. — New York, Connecticut, White Mountains, Pennsylvania! 



(?, 9. Length, 10 to 11""". Face black, shining, covered with dense 

 yellow pollen on the sides; cheeks bare and shining black. Frontal 

 triangle black, clothed with yellow pollen, except above the antennae. 

 Eyes in the male narrowly sei)arated. Front in female lightly pollinose 

 on the sides. Face of male usually with a slight convexity in the mid- 

 dle, sometimes, however, quite straight or even gently concave tlirough- 

 out, as in the female. Antennai varying from light yellow to quite 

 brownish. Thorax nearly opaque black ; humeri, the suture on each 

 -side, a small spot above the wings, and a vittula in the mesopleurae. 

 thickly yellow j)ollinose. Abdomen black, but little shining, of nearly 

 equal width throughout, a little oval in the female; the second, third, 

 and fourth segments (in the female the fifth also) with a complete yel- 

 low band, moderately arcuated, the convexity approaching the front 

 margin of the segments ; all of the bands margined with opaque black. 



