SYNOPSIS OF NORTH AMERICAN S"iRPHIDiE. 43 



and fourth joints yellowisli. Tegulaj white; halteres yellowish, their 

 heads above black. Wings rather long, dilutely yellowish or subfus- 

 eous, more yellowish toward the base, veins at the base yellowish, on 

 the outer part darker; stigma but little darker. 



This description is that of Loew for C. cyanescens, which applies closely 

 throughout to specimens from Connecticut and New Hampshire, with 

 the important difference that there is, in mine at least, a moderately 

 broad, opaque, black cross-band on the second abdominal segment. I 

 can hardly think that Loew would have overlooked this character, but 

 yet, until specimens are obtained without this band, and difl'eriug other- 

 wise specifically, I prefer to consider my specimens as belonging to this 

 species. With my White Mountain specimens I obtained several fe- 

 males, which evidently belong to the same species. Their description 

 is as follows : 



9 . Blackish blue, shining; pile everywhere short, on the thorax and 

 scutellum black, on the abdomen white. Front narrow, plane, gently 

 fossulate above the base of the antennae. Aulenniie reddish yellow, third 

 joint large, oval ; arista black, plumose. Face black, lightly pollinose, 

 the moderately projecting tubercle, together with the oral margin in 

 front, luteous. Sides of the thoracic dorsum and the margin of the 

 scutellum, with black bristles. Abdomen wholly shining. Front and 

 middle legs luteous, last joint of all the tarsi black, the middle femora 

 and tibiae subfuscous near the middle; hind legs black, the base and tip 

 of both femora and tibiae luteous, the third and fourth joints of the hind 

 tarsi fuscous-luteous. Tegulae white; halteres wholly light yellow. 

 Wings yellowish, the veins fuscous toward the outer part, stigma di- 

 lutely lutescent. 



This description, it will be seen, is almost precisely like that of C. phi- 

 mata, as given by Loew, except that he describes the antennae as mod- 

 erate in size, whereas in my specimens they are unusually large for a 

 Chilosia. 



Chilosia capillata. 



Chilosia capillata Loew, Centur., iv, 65. 



Cartosyrphus lamprurus Bigot, Annales Soc. Ent. Fr., 1884, 552. 



Habitat. — District of Columbia (Lw.), Virginia! 

 $ . Length, 7"""'. Shining metallic green. Eyes bare. Antennae yel- 

 lowish red, first joint and outer end of third black; arista bare (pubes- 

 cent only under a strong lens), black. Face shining black, in profile 

 with a long concavity, the tubercle nose-like, projecting considerably 

 forwards; on the sides above pollinose, extending across as a band 

 below the antennae. Frontal triangle a little swollen, gently pitted, 

 with long yellowish pile. Dorsum of thorax, pleurae, and scutellum 

 clothed with rather long yellowish pile. Scutellum without bristles on 

 its border, transversely grooved before the margin above. Abdomen 

 shining metallic green, the second and third segments, except the broad 

 anterior angles, opaque, or subopaque, black; pile light yellowish, or 



