292 



Id., Bull. 52 U. S. N. M. 441, 1902 (in part). 



B. C. Ent. Soc. Check List, 42, 1906. 



Meyrick, Gen. Ins. C, 5, 1910 (in part). 



Id., Wagner's Lep. Cat. pars 17, 4, 1913 (in part). 



Barnes & McDimnoiigh, Check List ISO, 1917 (in part). 



Grossbeck, Bull. Am. Mus. XXXVII, 135, 1917 (in part). 

 Trichoptilus wrightii Grinnell, Can. Ent. XL, 314, 1908. 

 XTrichoptilus lobidaclylus race ivrighti Barnes & McDunnough, Check List 150. 



1917, 

 Head and thorax brown, the posterior end of both thorax and patagia 

 white or whitish. Antennae white above with a fine dark longitudinal stripe. 

 Second joint of palpi with tuft below at distal end as noted in key, sometimes 

 rubbed off in poor specimens ; color same as head, white below. Third joint 

 slender, moderately long, dark at the side and light above and below. Abdomen 

 brownish above with divergent light and dark stripes on the first few segments 

 and parallel stripes on the last two or three. Legs brown and white striped 

 as in defectalis, the hind pair differing in that the two brown stripes on the 

 upper surface of the tibiae before the first pair of spurs are separate and straight, 

 not in part spiral and joined near their distal end. 



Primaries concolorous with anterior part of thorax, varying from light 

 ochreous to a dull brown. First lobe darker, the transverse bands marked dis- 

 tinctly with white scales on the costa, these usually continued from second band 

 to apex. The primaries are otherwise as in defectalis with two exceptions 

 The costal fringes of the second lobe are not white tipped near the apex, and 

 the white hairs in the fringes of the inner margin are grouped in two rather 

 conspicuous patches. The secondaries arc a darker, more dull shade of brown, 

 each feather usually with a few dark scales in the apical fringes. The third 

 feather has the tuft of black scales on the inner margin well-developed, and the 

 fringes preceding it often contain noticeable white hairs. At the apex of this 

 feather the fringes are usually white: otherwise they are concolorous with the 

 wing. Expanse 14-18 mm. 



Although the superficial appearance is not very different from 

 tliat of defectalis Wlk. the male genitalia (plate XLIX, fig. 8) are 

 much nearer to those of lobidactylns Fitch in form. The narrow valves 

 at once separate the species from defectalis, in which they are very 

 broad. 



Distribution : We have seen no specimens of this genus from 

 British Columbia, but think it probable that those recorded in the 

 B. C. Check, List as lobidactylus are this species. Calif ornicus occurs 

 throughout California, whence we have specimens taken in various 

 ])laces in IMay, Aug., Sept., and Oct. In the Barnes collection there 

 are also specimens from Utah, Aug. ; Colo., Ariz., Se])t. ; and Fla. May. 



The early stages are unknown. 



