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



third antennal joint; cheek about twice as high as width of 

 parafacial ; Thoracic presutural acrostichals two-rowed, 

 rather strong; all thoracic bristles long and strong; lower 

 stigmatal bristle long, directed downward. Abdomen broad, 

 not much longer than thorax; fifth tergite with four long 

 bristles and a number of short setulae ; hypopygium of moder- 

 ate size, basal segment subglobose; processes of fifth sternite 

 large, broad, rounded at apices, their length greater than their 

 greatest width, surfaces with sparse setulae and some moder- 

 ately long bristles apically. Legs rather stout ; fore tibia with 

 the posterior median bristle short; mid-femur with a few 

 short bristles on basal half of antero-ventral surface and three 

 or four long widely placed bristles on postero-ventral ; mid- 

 tibia with the median bristles at nearly the same height; hind 

 femur with three or four widely spaced bristles on antero- 

 ventral surface and one or two on postero-ventral ; hind tibia 

 with the antero-dorsal bristle much longer than the antero- 

 ventral, the apical dorsal bristle about one eighth from apex. 



Female. — Similar in color to the male, the abdominal spots 

 not so clearly defined and the wings not so pale. Differs from 

 the male in having the tibial bristles all much stronger. 



Length, 3.5-4.5 mm. 



Type, male. No. 531, C. A. S., Huntington Lake, Calif., 

 alt. 7000 feet, July 9, 1919, and allotype, female. No. 532, 

 C. A. S., same locality, July 16, 1919, E. P. Van Duzee, coll. ; 

 also one female paratype, same locality, July 28, 1919; E. P. 

 Van Duzee, collector. 



An immature specimen from the same locality, July 9, may 

 represent a distinct species. 



This species resembles C. fraterna Malloch, but is larger 

 and has the tibiae entirely pale. 



7. Coenosia parvisquama, new species 



Female. — Color as in the preceding species but the thorax 

 not so distinctly shining, and more densely pruinescent. Legs 

 black, densely gray pruinescent, bases of tibiae reddish. 



Frons as in preceding species; antennae short, third joint 

 not twice as long as second, its apex about two-fifths of the 



