UHLEE ON INSECTS. 801 



the t. p. line, wbich is widely inwardly angalated. Inner line with a 

 bright golden costal patch ; the line itself is rounded and gilded below 

 median vein. Median space rich dark brown (like ampla) below the 

 median vein ; above grayish, washed with pinkish over the faintly 

 outlined orbicular. Reuiforin narrow, upright, with a fine gilded inte- 

 rior annulus. Metallic mark pale golden, somewhat as in JJ-mireum, 

 with an elongated detached spot beyond it. Exterior or t. p. line run- 

 ning inwardly to median vein, thence outwardly again to near internal 

 angle, where it is followed by a rusty spot^ the line is narrow, geminate, 

 gilded inferiorly. Subterininal line denticulate j terminal space lighter 

 gray than subterininal. Fringes dark, cut with paler. Hind wings yel- 

 low, with rather broad black borders, dusky at base, with narrow, faint^ 

 discal lunule. Beneath hind wings yellowish, with costa purplish, bor- 

 der repeated ; fore wings obscure, washed with yellowish, with discal 

 lunule and exterior line less angulated than on upper surface. Body 

 fuscous witli purplish hairs. Expanse 36"^™. 



Idaho Springs, Colo., August 15, Baron Osten Sacken, to whom the 

 species is dedicated. It is the most beautiful of its group. 



The Lepidoi^terous material hitherto collected by the different Govern- 

 ment surveys has proved of high scientific interest, It is therefore 

 hoped that it will be found convenient to afford facilities to entomolo- 

 gists to' accompany the expeditiongt, or to attach one or more perma- 

 nently in employ. 



