94 PROCEEDINGS OF THE NATIONAL MUSEUM vol. iib 



single row, anteriorly with tuft of fine appressed bristles; dorsolateral 

 bristles in 2 staggered rows, converging almost to midline just anterior 

 to scutellum where the 2 rows are much broadened and staggered; 

 anterolateral bristles 5, much finer and paler than dorsolateral bristles; 

 scutellum with single posterior row of 12 long black bristles, anteriorly 

 16 scattered near midline. 



Femora with apical faint brown band, remainder infuscate stramin- 

 eous. Fore tarsi with long beard 8 times as long as diameter of 

 tarsus; middle leg and hind leg densely pilose. Fore tibia with single 

 lyrate spur (similar to that illustrated for P. hjra, new species), com- 

 posed of 6 spines; main spur spine only slightly heavier than lateral 

 bristles; middle tibial spurs lyrate, each with 6 spines, main spur spine 

 heavier than remainder of side bristles; spurs of approximately equal 

 length. Hind tibial spurs very similar to those of middle leg, lyrate 

 form not quite so pronounced; comb of 6 spines. 



Leg proportions: 



Wings densely hairy; II44.5 terminates distal to Cui; M terminates 

 behind apex of wing; ratio of arculus to m-cu:m-cu to wing tip 0.41; 

 cross veins not darkened. Length of first basal cell beyond end of 

 second basal cell greater than length of m-cu cross vein. Wing 

 length 2.85 mm.; venarmn ratio 0.84. 



Abdominal segments I to V with basal brown fascia, middorsal 

 portion elongated posteriorly forming roughly shaped T; remainder 

 of segment pruinose white; brown fascia progressively enlarged pos- 

 teriorly with corresponding decrease in amount of white shown; seg- 

 ment VI to tip of abdomen almost entirely dark brown. 



Female: Unknown. 



Paratypes: In UCLA: 4 males. Resting Springs, Inyo Co., May 29, 

 30, 1955. In UCD: 1 male, Benton Station, Mono Co., July 20, 

 1950, H. A. Hunt. 



Males: Wing length, range 2.15-2.74; mean 2.30 mm. (4); fore leg 

 ratio, range 0.78-0.85; mean 0.81 (3); antennal ratio, range 1.25- 

 1.54; mean 1.37 (4); venarum ratio, range 0.82-0.86; mean 0.84 (5); 

 ratio of arculus to m-cu:m-cu to wing tip, range 0.37-0.43; mean 

 0.40 (4); prealar bristles 9 (1); anterolateral bristles 9 (1). Middle 

 tibia with 2 equal, lyrate spurs, 4 side spines almost as long as main 

 spur. Hind tibia with 2 subequal (24:21) lyrate spurs, each with 4 

 side spines about two-thirds as long as main spine; comb of 4 bristles. 



This species is differentiated from related species in the key (p. 102). 



