349 



edge, and between it and the outer edge are two faint, diffuse, irregular lines. 

 The outer four of these lines are continued on the hind wing, the inner and 

 shortest one being straight and distinct, the others more or less waved; discal 

 dot minute, black, much larger, and more distinct on hind wing. The outer 

 edge of fore wing is narrowly edged with black between the venules, and 

 there are small black dots on the fringe opposite the ends of the venules ; 

 fringe white : costa testaceous above and on the under side. Beneath, the 

 discal dots more distinct; beyond the discal dots on fore wings are two black 

 lines, the outer wavy, and on the hind wings one line only is present, being 

 wavy and situated nearer the outer edge than its fellow on the upper side ; 

 wings paler than above; the innermost line on the fore wings is often obsolete. 



Length of body, 0.3S-0.48 ; fore wing, 0.54-0.64; expanse of wings, 

 1.10 inches. 



California (Edwards ; Behrens). 



This species is apparently common in the Pacific States, representing 



and being closely allied to our eastern A. enucleata Guen.; it is also frequently 



met with in Colorado. It was discovered by Lieutenant Carpenter, near 



Denver, and near Kenosha House on the South Park road, four miles from 



the Park ; elevation, 9,000 feet It was found in Clear Creek Canon by Mr. 



Uhler (Hayden's Survey) in August; also at Blackhawk, July 2, Golden, 



July 3, and Manitou, July 15 (Packard, Hayden's Survey). This species is 



.closely related to A. strigilaria from Central and Southern Europe, Russia, 



and Amur. 



Acidalia ordinata Walker. Plate 10, fig. f>6. 



Acidalia ordinata Walk., Lep. Het. Br. Mus., xxii, 722, 1861. 

 Acidalia candidaria Pack., Fifth Rep. Peab. Acad. So., 72, 1873. 



Unusually glistening white, free from dark speckles. Body white. Head 

 black in front ; palpi rather short, tip obtusely pointed, black above and at 

 tips, beneath whitish; antennae white, densely ciliated, "Wings pure glisten- 

 ing-white, with three ochraceous lines, oblique, very slightly sinuate; inner one 

 smallest, not reaching the costa; the middle one the widest; submarginal 

 one more sinuate than the others, not reselling the apex. A narrow, marginal, 

 ochraceous line at base of the white unspotted fringe. Two lines of equal 

 width on hind wings, the inner one straight, bent a little just before the costa; 

 the outer bent in the middle and a little inward. Beneath, entirely white; 

 costa of fore wings tinged with pale ochraceous; lines very faintly reproduced 



