1930 ] 
Nematoproctus in North America 
169 
coppery reflections at base, sixth violet ; venter yellow ; dor- 
sum of abdomen and sides beyond second segment with 
black hair; sides of second with long yellow hair; hypopy- 
gium black with numerous bristly hairs on posterior sur- 
face, its outer lamellae black, as long as height of hypopy- 
gium, fringed with stiff black hairs on outer edge; no 
inner appendages visible, except a hair-like one. 
Coxae yellow, anterior pair with rather long, abundant, 
pale yellow hair and three long and three short black 
bristles near tip; middle coxae blackened on outer surface 
of basal half, their hair pale yellow; posterior ones with 
one erect bristle on outer surface ; all femora and fore and 
middle tibiae wholly yellow; basal two thirds of hind tibiae 
yellow, spical third black; fore and middle femora with 
rather short, yellowish hairs below; fore and middle tarsi 
yellow, becoming blackish towards tip; hind tarsi wholly 
black; first joint of fore tarsi with a row of longer hairs 
below, which are shortest at tip and extend along second 
joint; joints of fore tarsi as 45-16-11-9-9; of middle ones 
as 57-24-20-11-9; joints of posterior pair as 41-39-26-17-11. 
Calypters and their cilia whitish; halteres pale yellow. 
Wings nearly uniformly tinged with brownish gray; 
third vein bent backward towards their tips; last section 
of fourth vein slightly and gradually bent forward from 
near its middle, then backward so as to be parallel with 
third at tip, ending in apex of wing; last section of fifth 
vein straight, it is as 57, cross-vein as 22; sixth vein a 
little sinuous; anal angle of wing prominent. 
Described from one male, taken by C. H. Curran, June 
22, 1929, at Avon Old Farms, Avon, Connecticut. 
Nematoproctus metallicus new species 
Male : Length 3.5 mm. ; of wing the same. Face narrow, 
not half as wide as front, silvery white, its sides parallel; 
palpi narrow, longer than width of face, yellow, silvery 
white pollinose; front blue-green, white pollinose; antennae 
black, first joint wholly yellowish, bare above, rather long; 
third joint moderately large, conical, about as long as wide, 
arista inserted near its base ; occiput black, green j ust back 
