5O ENTOMOLOGICAL NEWS. [Feb., 'l8 



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 Aid., 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. 



$ Length 4.2 mm., of wing 5 mm. Face covered with silvery 



pollen, pointed below, somewhat wider and shorter than in H. intcntus 

 Aid., 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 clown; 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. 



