46 
Psyche 
[April 
bristles on anterior surface. Tarsi black with white pulvilli: 
fifth joint of middle and hind tarsi very slightly widened. Joints 
of fore tarsi as 29-14-11-7-10; of middle ones as 33-22-17-10-12; 
those of posterior pair as 35-23-17-12-16. Calypters yellow with 
white cilia. Halteres blackish with the stem partly yellow. 
Wings grayish, tinged with brown in front of second vein; 
a dark brown, nearly round spot on the cross-vein and on the 
middle of last section of fourth vein, this section being nearly 
straight; veins wholly black, not at all yellow at root of wing. 
Described from one male taken at Newport, Oregon, June 
8, 1925, by E. C. Van Dyke. 
Type in the California Academy of Sciences. 
Hydrophorus nigrinervis new species. 
Male; Length 3 .2 mm.; of wing 4.2 mm. Face wide below, 
narrowed above, wholly covered with white pollen. Palpi black 
with black hair. Front opaque with brown pollen. Antennae 
black, short, third joint nearly round in outline; arista thick 
with a bristle-like tip, a little longer than the antenna. Beard 
scanty, white; the black orbital cilia do not reach down to the 
middle of the eye. One pair of post verticals. Cheeks extending 
narrowly below the eyes. 
Thorax and abdomen bright metallic green; pleurae and 
sides of abdomen dulled with white pollen; propleurae with one 
black bristle on each side above fore coxae; scutellum with two 
pair of bristles; hair on the dorsum of the abdomen black. Hy- 
popygium black with white pollen, its hair white ; its appendages 
extending downward, as long as height of hypopygium with 
several long, white hairs at tip. 
Fore coxae green with white pollen and hair; no black bristles 
at tip; middle and hind coxae black with white pollen. Femora 
and tibiae green, their hair black; fore femora thickened on basal 
portion, narrowed at tip, with two, closely approximated rows 
of spines below, one of which extends their whole length; fore 
tibiae with a row of short, erect spines on whole lower edge; 
middle femora with a row of short bristles on lower posterior 
edge of apical two thirds and three small ones on lower anterior 
