188 
Psyche 
[June 
thickened. Joints of fore tarsi as 23-10-8-6-7; of middle ones 
as 28-19-12-9-8; joints of hind tarsi as 20-24-17-11-9. Calypters 
and halteres yellow, the former with pale cilia. 
Wings grayish; third and fourth veins parallel, but both 
slightly bent backward at tip; last section of fifth vein 20, of 
cross-vein 15 fiftieths of a millimeter. 
Described from one male taken at Gloversville, N. Y., by 
C. P. Alexander. Type in the Cornell University Collection. 
Gymnopternus maculiventris sp. nov. 
Male: Almost wholly yellow, with black hairs and bristles, 
nearly related to flavus Loew. 
Length 3 mm. Face yellow, narrow below. Front blackish 
on upper half, covered with white pollen. Occiput blackish 
with white pollen. Antennae yellow; third joint slightly longer 
than wide, pointed at tip, its apical half brown; arista black, 
pubescent. 
Thorax and abdomen yellow, they have a slight green 
reflection in spots when viewed in certain lights, their hair and 
bristles black; abdomen with poorly defined, black spots on 
third and fourth segments. Hypopygium black, its lamellae 
small, yellow, fringed with stiff black hairs. 
Coxae, femora, tibiae and tarsi pale yellow; posterior tarsi 
slightly infuscated from the tip of first joint, which has a small 
bristle at tip. Joints of fore tarsi are as 28-15-12-9-8; those of 
middle ones as 30-19-16-12-8; joints of posterior pair as 23-24- 
15-15-8. Calypters, their short cilia and the halteres pale yellow. 
Wings yellowish gray with yellow veins; third and fourth 
veins parallel; last section of fifth vein 26, cross- vein 13 fiftieths 
of a millimeter; sixth vein short. 
Described from one male, taken at Cold Spring Harbor, 
New York, August 9, 1920, by Mr. Davis. Type in the author’s 
collection. 
This differs from flavus Loew in having the third antennal 
joint short, the hairs on the abdomen and those fringing the 
lamellae black; the hypopygium also being black. In flavus the 
hypopygium is yellow, its lamellae are fringed with yellow hairs 
