THE CANADIAN F.MTOMOLOGIbT. 315 



Habitat : South Fork, Santa Ana River, San Bernardino Mts., 

 Calif., 6,200 ft. altitude, June 27 and 28, 1907; described from five 

 specimens, two of which are types in the author's collection. 



This species is related to O. n'uigoris, Wlsm., from Northern Cali- 

 fornia and Southern Oregon. 



There is a single specimen from the Santa Ana River, 5,500 ft. 

 altitude, Aug. 8, 1907. Expanse, 20 mm. General colour russet, thus 

 being very much lighter than Bernard'uius ; the white stripes on the first 

 lobe of the fore wings are very indistinct, the outermost almost obliterated; 

 the white bar at the fissure scarely perceptible. A few black hairs on the 

 fringe of the second lobe. The feathers of the hind wing are as dark, or 

 nearly so, as Bernardinus. The thorax and abdomen russet ; the white 

 patch at base of thorax very conspicuous. I consider this specimen to 

 be either a seasonal or altitudinal form, or probably both (note the date 

 and altitude above). I propose to call this {ovmfinitu?ius, n. form. 



Platyptilia Williamsii^ n. sp. — Expanse of wings, 20.5 mm. 

 Antennae, palpi and head, wood-brown ; thorax and abdomen wood-brown, 

 conspicuously marked with hoary scales or hairs, especially dorsally, where 

 it is quite white. Legs white, with conspicuous black bars ; spurs white 

 and of equal length. 



Fore wings are generally fawn-colour, with traces of wood-brown and 

 russet. Fringes I'ght brown. First lobe : The outer third consists of a 

 cinereous band, within this a wood-brown band, broader than the first band; 

 within this is a dark mummy-brown triangular patch, the point resting on 

 the end of the fissure, the costal side and side parallel with the outer 

 margin, longest. A costal light mummy-brown streak extending halfway 

 to base. The outer cinereous band (marginal) continuous with that on first 

 lobe ; a line of black dots within the fringe of the inner side, the outer- 

 most small and isolated, the second lousier. Rest of lobe of general 

 uniform colour. The whole wing covered with glistening whitish scales. 

 Hind wings of an even, pale fawn colour. The black scales along the 

 fringe of third feather to more than half the distance from base to apex, 

 numerous and crowded. Under side with a black outer margin ; a white 

 line on the outer side of the cinereous band, which is much paler above, 

 more cinereous ; a white dash on the costa above the fissure ; a black spot 

 at end of fissure. 



Habitat: Lake Merced, San Mateo Co., Calif, May 31, 1907, F. 

 X. Williams. Raised from larva found in head of a composite flower. 

 Named in honour of my friend and fellow-collector, Mr. Francis Xavier 

 Williams, of San Francisco. 



