50 ENTOMOLOGICAL NEWS. [Feb., 718 
Abdomen green with coppery reflections and stiff black hairs, dusted 
with white pollen which is more dense on the sides. 
Fore coxae clothed with long bristle-like hairs on the front surface; 
middle and hind coxae also with stiff black hairs; fore femora a 
little enlarged at base and with rather long black hairs, but without 
spines below; fore tibiae at tip with a distinct angle produced towards 
the femora, without spines on the inner side, but with a few slender 
bristles above; last joint of all the tarsi slightly flattened. 
Halteres pale yellow; tegulae yellowish with a fringe of dark brown 
hairs. Wings tinged with gray with a brown cloud on the cross-vein; 
longitudinal veins bordered with brown; costa stout beyond the tip 
of the first vein; veins brown, not paler at base of wing. 
Described from one male and three females from Califor- 
nia, the holotype male at San Diego on June 14: two females 
at San Diego, April 5th; the other female at Long Beach, Los 
Angeles County, February 28th. All were taken on salt 
water. Type in my collection. 
This species runs in Prof. Aldrich’s key (Psyche, Vol. xviii, 
p. 48) to H. gratiosus Ald., but is quite distinct, the shining 
green face, crooked fore tibiae and metatarsi and the second 
vein of the wing running so close to the costa make the male 
easily recognizable; the female can be separated by the black 
hair of the fore coxae and tegulae. 
Hydrophorus argentatus sp. nov. 
é@—Length 4.2 mm., of wing 5 mm. Face covered with silvery 
pollen, pointed below, somewhat wider and shorter than in H. intentus 
Ald., the portion below the suture being nearly an equilateral triangle; 
face slightly narrowed above; front seal brown; occiput with a row 
of spines extending each way from the postverticals, about six on 
each side and joining the orbitals rather far down; orbitals extending 
nearly to the lower corner of the eye; palpi black; antennae black, 
third joint large, about as broad as long, irregular in outline. 
Thorax covered with brown pollen, flattened space before the 
scutellum shining bronze brown; propleurae with rather long white 
hair and one black bristle. 
Abdomen bronzed or coppery; hypopygium concealed, not cutting 
into the fourth sternite. 
All coxae with fine white hairs; fore femora rather thick on basal 
portion, with two rows of spines below; anterior tibiae nearly straight 
with a slight projection on inner side at tip and a row of small spines 
on inner surface. 
