SYNOPSIS OF NOETH AMERICAN SYRPHIDiE 37 



Differs from G. nitida, which it closely resembles, in the second joint 

 of the antennae being shorter, the concavity of the face less, and in the 

 termination of the fourth longitudinal vein. 



Chrysogaster pictipennis. 



Orthoneura pictipennis Loew, Centur., iv, 58. 



Habitat. — Connecticut, New York, New Jersey ! . 

 $ , 9 . Length, 5.5 to 6°^™. Head metallic bronze-green. Antennae 

 elongate, black, the first two joints and the base of the third reddish ; 

 considerably longer than the face, the third joint not three times as 

 long as the second. Face finely wrinkled in both sexes ; the epistoma 

 considerably and abruptly projecting ; on each side of the base of the 

 antennae near the eye a triangular silvery white spot. Front in female 

 broad, markedly rugose, with a slender median furrow. Eyes unicolor- 

 ous. Dorsum of the thorax moderately fhining, finely j^unctulate, with 

 four bronze-puri)le stripes, the lateral ones abbreviated in front, the in- 

 termediate ones behind. Scutellum flattened. Disk of the abdomen 

 moderately shining, the margins bronze-green or coppery shining. Legs 

 green-black, the base and tip of the tibiae and the first two joints of the 

 tarsi reddish yellow. Tegulae white. Halteresdilutely yellowish. Wings 

 cinereous ; the discal and first posterior cells with brownish spots, stigma 

 and clouds on the transverse veins fuscous ; the fourth vein terminates 

 in the third before the tip of the second, the terminal segment, and the 

 vein at outer end of discal cell, straight, with a stump of a vein on the 

 inner side. 



Six specimens. 



Chrysogaster lata. 



Chrnaocjaster latus Loew, Centur., iv, 59. i 



Habitat. — British North America (Loew), Oregon!. 



9 . Bronze-black, shining, legs wholly of the same color, antennae of 

 moderate size, black, third joint rotund, piceous; sides of the front 

 below transversely rugose; wings sublutescent, stigma and veins luteous. 

 Length, 7™™. 



Bronze-black, shining, with sparse, very short whitish pile. Front 

 broad, on the sides below transversely rugose. Antennae of moderate 

 size ; third joint subrotund, fuscou?, arista of the same color. Facial 

 tubercle wanting, epistoma strongly produced. Abdomen broad, shin- 

 ing, the posterior margin of the last segment entire. Legs wholly bronze- 

 black. Halteres and tegulae lutescent. Wings toward the costa di- 

 lutely sublutescent, veins and stigma luteous. (English Eiver, Kenni- 

 cot). — Translation. 



A single female specimen from Mount Hood, Oreg., agrees very well 

 with this description. The front is only lightly rugose on the sides. 



P. S. — An examination of the type at Cambridge assures me that the 

 Oregon specimen belongs here. 



