176 PROCEEDINGS OF THE ACADEMY OF [Oct., 



thickened basal annulus nearly broad as long, the following annuli 

 together as long as the basal one. Neuration as in gigantulus. 

 Length, 17 mm. 



9 • Similar but frons twice as broad as width of antennae, entirely 

 pruinose. IMesonotum more grayish. 



Type. — ^cf; Keddie, Plmnas County, California, July 6, 1918, 

 (F. M. Jones), [A. N. S. P. No. 6197]. Paraty-pe.—l 9 ; topotypical. 



LEPTIDAE. 

 Arthropeas jonesi new species. 



Differs from americana Lw., and magna Johns., the other known 

 species, in having the legs entirely black. In build resembling magna, 

 with a median globose swelling on the face similar to that in 

 Chrysopila and nearly visible in profile. Jonesi probably represents 

 a distinct genus or subgenus. 



cf. Black; antennae, palpi, and hal teres pale, also a small spot on 

 humeri. All pile black and rather long and abundant, including 

 the cilia of the white squamae. Face, and sparingly on mesonotum, 

 grayish pruinose. Wings blackish, becoming more intense along 

 costa. Thorax and abdomen, shining. First and second antennal 

 joints short, subglobose; third, three to four times as long as first 

 two together, and broader than second, gradually tapering to a 

 minutely truncated apex, bearing a few hairs, not a terminal style, 

 composed of eight annuli, of which the basal and apical ones are 

 longer and subequal. Fore tibiae with one small apical spur, middle 

 and hind ones with two each. Length, 13 mm. 



Type. — cf; Keddie, Plumas County, California, June 6, 1918, 

 (F. M. Jones), [A. N. S. P. No. 6198]. 



Chrysopilus nudus new species. 



This species suggests flavibarhis Adams, but the mesonotum of 

 the female is not velvety and the pile and tomen are not yellow. 



cf . Black; stalk of halteres, tibiae and bases of tarsi, pale. Wings 

 slightly brownish. Opaque, grayish. Mesonotum dorsum, broad 

 bases of abdominal segments, brownish. All pile and tomen sparse 

 and white. Antennae bare. Eyes narrowly separated. First an- 

 tennal joint shorter than second. Palpi long, falciform, white pilose. 

 Branch of third vein originating opposite end of first vein. Length, 

 5 mm. 



9 . Similar, but stouter. Frons broad and brownish medianly. 

 Mesonotum with a broad median stripe and two large sublateral 



