48 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



Wings strongly tinged with blackish ; third and fourth veins bent so as 

 to approach each other beyond the cross-vein, still nearly parallel at their 

 tips. 



Female : Color and wings as in the male. Face wide with white pollen, 

 through which the green ground color can be seen ; third antennal joint 

 short, a little longer than wide, triangular ; the apical arista longer than the 

 antennae. Front violet, narrowly blue or green just above the antennae and 

 along the orbits ; fore coxse with shorter hair than in the male ; fore basi- 

 tarsi not concave below, their tips not widened. 



Described from one male and three females taken at Hun- 

 tington Lake, Fresno Co., California, July 9, 1919, at 7000 ft. 

 elevation, by Edward P. Van Duzee. 



Holotype (No. 729), male, and allotype (No. 730), female, 

 in the Museum of the California Academy of Sciences. 



This species is very much like P. mnndus Loew, but it is 

 smaller and the female is more AVholly black, the male has the 

 lamellae long and slender, while in mnndus they are small and 

 rounded ; the inner appendages are small in this species and 

 altogether black while in mnndus they are long and yellowish ; 

 the third antennal joint is shorter in this than in mundns. 



2. Gymnopternus californicus, new species 



Male : Length, 3.2 mm. Face wide, covered with brown pollen. Front 

 dark blue-green, almost black. Antennae black, third joint scarcely pointed 

 at tip, about as long as wide. Orbital cilia wholly black. 



Thorax and abdomen greennish black, shining; hypopygium and its 

 lamellae black, the latter small, crescent shaped, fringed with brown hairs. 



Legs and feet wholly black, the knees a very little yellowish ; middle 

 tibiae with one bristle below and four above, all rather long and slender ; 

 middle and hind femora each with one preapical bristle, the latter with 

 rather long hair on the upper edge, which is longest near the base. Calyp- 

 ters and halteres yellow, the former with black cilia. 



Wings tinged with blackish ; rather evenly rounded on the posterior mar- 

 gin, the anal angle being rounded oflF, not at all prominent ; third and 

 fourth veins a very little convergent at their tips, still the tips far apart. 



Female : Agrees with the male in color and in the form of the wings. 

 The face is wider and a little more gray than in the male ; the hair on the 

 upper edge of the hind femora is much shorter. The fore tibiae with a 

 row of little bristle-like hairs on their upper surfaces which are quite con- 

 spicuous ; there are also three or four longer bristles among these hairs. 



Described from 11 males and 18 females, taken at Hunting- 

 ton Lake, Fresno Co., California, July 9, 1919, at 7000 ft. ele- 

 vation, by Edward P. Van Duzee. 



Holotype (No. 731), male, and allotype (No. 732), female, 

 in the Museum of the California Academy of Sciences. 



