banks: psammochahidae. 247 



Cryptocheilus atratus, sp. nov. 



Typc—CorneW Univ. Coll. Paratypc.— M. C. Z. 10,406. 



Calif.: Glenwood, 27 May, Lomoncove, Tulare Co., 9-11 July, 

 Harris, Humboldt Co., 29 June, Felton, Santa Cruz Mts., 20-25 May 

 (Bradley). 



9 Deep black, the tarsi more brown, winpis violaceous. Body with short 

 hairs, longer on the vertex, tip, and venter of abdomen. Face as broad below 

 as above, clypeus slightly concave below, lateral ocelli verj^ much nearer to 

 each other than to the eyes, vertex, from in front, nearly straight acro.ss, third 

 antennal joint one and a half times longer than first, one and a fourth longer 

 than the fourth joint, last joint very slender. Pronotum slightly angulate 

 behind; metanotum transversely striate, most noticeable on the sides. Ab- 

 domen slightly depressed, hair at tip rather yellowish brown. Legs slender, 

 mid and hind tibiae with numerous short, but stout spines, inner spur of hind 

 tibia about two fifths of the basitarsus. Wings hardh' reaching bej'ond 

 abdomen; marginal cell nearly its length from wing-tip, second submarginal 

 cell little longer than broad, receiving the first recurrent vein beyond middle, 

 the third submarginal longer than the second, not extending beyond marginal, 

 receiving the second recurrent vein near middle, the latter evenly but not 

 strongly curved, basal vein before the transverse. 



Male is much more slender, the pronotum is plainly much longer, suggesting 

 a Pedinaspis, the metanotum is not distinctly striate; the lateral parts of the 

 genitalia are densely black fringed on the outer side. 



Length 8 to 14 mm. 



Related to C. idoncus from North Carolina but latter has the 

 metanotum not plainly striate, less violaceous wings, and slightly 

 different venation. 



Mygnimia. 



1. Second recurrent vein nearly straight across hespcrina. 



2. Second recurrent vein much curved ustulata. 



Mygnimia ustulata (Dahlbon). 

 Utah: Salt Lake Co., 30 May; Arizona. 



Mygnimia hesperina Banks. 

 Calif.: San Diego, Stanford Univ. 



