163 



basal Hue, bent outward on the median vein ; on the inner third of the wing 

 is a double (sometimes single) white line, wavy, with a distinct angle on the 

 median vein ; a dark, indistinct, discal dot; about half-way between the discal 

 dot and the outer edge of the wing is a much broader white band than the 

 others, traversed in the middle by a black wavy line (sometimes consisting 

 of a row of dots); the band is irregular, with a prominent angle in the tirsl 

 median space ; half-way between this band and the edge of the wing i* a 

 scalloped white line, usually represented by a row of white dots. Hind wings 

 marked just as in the fore wings; fringe black, checkered with white; 

 beneath, the same as above, with the bands and spots wider, so that there is 

 a greater white surface than above. 



Length of body, 9,0.35; of fore wing, 9,0.45; expanse of wings, 0.90 

 inch. 



This is allied to R hastata, but differs in its smaller size, and in the 

 hinder wings being marked like the anterior pair. Three specimens occurred 

 at Beaver Creek, near Fair Play, South Park, at the borders of the sur- 

 rounding mountains, elevation 9,000 feet, or a little over; and at Turkey 

 Creek Junction, Colo., June 16-25 (T. L. Mead). These examples do not. 

 differ from some received from Europe through Prof. P. C. Zeller. This is 

 its first occurrence in the United States. I am informed by Mr. H. Strieker 

 that he has a specimen from Labrador which does not differ from European 

 examples. It occurs in Central and Northern Europe and Turkey, and is 

 reported by Staudinger, with a query, from the Ural Mountains and Amur. 



Larva. — "The caterpillar is cylindrical, slightly attenuated in front, and 

 rests in nearly a straight posture ; but, when disturbed, tucks in its head, and 

 the anterior part of the body is then slightly involute. The head is brown, 

 doited with black; the body brown, with a dark, nearly black, narrow, median 

 stripe; on each side of this are two white dots on each segment; and on each 

 side of the body are two narrow, pale, slightly undulating stripes, the lower 

 of which is immediately above the spiracles; these two stripes are most deli- 

 cately margined with black. This caterpillar is extremely constant in color. 

 It feeds on the hedge bed-straw, and is full-fed at the beginning of August. 

 It spins a slight cocoon on the surface of the earth, and remains in the chrys- 

 alis state throughout the winter." — Newman's British Moths, 157. 



This species is said to be double-brooded in Europe. 



