118 BULLETIN 85, UNITED STATES NATIONAL MUSEUM. 



less rhomboidal than in arctostaphyli, thick, coriaceous, almost opaque, 

 especially on darker portions, about twice as long as broad, trans- 

 versely wrinkled; first marginal cell small; medial veins and radial 

 sector sinuate ; pterostigma wanting; clavus large. 



Genitalia. — Male. — Anal valve long, slender, simple, about one- 

 third longer than forceps, tip rounded; forceps slender, converging 

 a little toward apex, posterior edge straight, anterior edge deeply 

 emarginate near apex making the tip hook-like in appearance, 

 pubescent. Female. — Genital segment longer than in preceding 

 species, dorsal valve longer than ventral, both acute at tip. 



Redescribed from eight males and four females (which are para- 

 types) from Santa Cruz Mountains, California (Koebele), collected on 

 Arbutus menziezii during July and August. 



EUPHYLLURA ARBUTICOLA, new species. 



This species resembles very closely arhuti in most respects, including 

 size and general color, but differs in the color of the forewing, being 

 uniformly darker brown and not bicolored, with sometimes a lighter 

 area across the base; the venter is darker than in arhuti. Body a 

 little more rugose. Genal lobes shorter, and more squarely truncate; 

 antennae slightly shorter. Head and thorax similar. Wings some- 

 what larger, thicker, more rugose ; veins even more sinuate. 



The chief difference is in the male genitalia; anal valve stouter, 

 relatively shorter; forceps distinctly thicker, without apical emargina- 

 tion on anterior edge, and with a distinct tooth on posterior edge 

 inside about one-third the length from apex, broadly rounded at 

 apex. 



Described from six males and four females from Chiric Mountains, 

 Arizona (H. G. Hubbard), on Arhutus arizonica, in September. 



Type.— Cat. No. 18098, U. S. Nat. Mus. 



Tribe ABYTAININI. 



The distinctive characters of this tribe are given in the synoptic 

 table above. 



Genus EUPHALERUS Sch>wapz. 



Euphalerus Schwarz '04:239. 



This genus was erected in 1904 by E. A. Schwarz for the single 

 species nidifex from Key West, Florida. The addition to the genus 

 of three new species necessitates a slight revision of the original 

 generic description. 



Body robust, surface punctate. Head vertical to subvertical; 

 vertex broader than long, sides straight between eyes, then converging 

 to front, truncate at front margin. Genal cones large, broad, 

 rounded at apex, more or less divergent, not depressed below level 



J 



