170 Journal New York Entomological Society. [Voi. xvi. 



Hindwing. — Pale fuscous, darker around margins, underside paler. Underside 

 forewing creamy ochreous, thickly overlaid with blackish brown, costal dots and 

 dashes repeated ; cilia not speckled, outer half whitish. 



Twenty-one specimens, Denver and Clear Creek, Colorado, July 

 17 to August 28, collected by E. J. Oslar, four specimens from Dr. 

 Barnes and two from Mr. Busck's collection. 



Cotypes, Cat. No. 11,936 U.S.N.M., in Dr. Barnes and my col- 

 lection. ^ 



This species is close to graciliana Krft. and albigiittatia Zell., 

 the former is similarly dotted on forewings but each dark dot is on a 

 larger white dot ; the latter is a very much smaller insect with the 

 dots less in number but proportionately larger in size. 



Eucosma grotiana, new species. 



Expanse 15-22 mm. 



Palpi and head very dark cream or very pale fawn, former shaded with brown 

 externally ; it is flattened, upcurved with long scales on underside forming a round 

 tuft extending i^ times eye-width beyond head, apical joint concealed ; antenna 

 dentate, light ochreous, a small dark brown dot on basal joint internally ; thorax 

 white with two transverse dark brown bars across patagia, near anterior and posterior 

 ends similar bars across thorax at middle and before posterior end ; abdomen and 

 legs dark cream, latter dusted with brown. 



Forewing. — White, with brown markings ; the basal area is white with a curved 

 line of brown scales from dorsum to costa, beyond is a narrow white area succeeded 

 by a broken brown fascia at inner fourth which outlines the usual basal area, this is 

 sharply angulated outward at middle of wing, and is obsolete on costal third. A 

 prominent brown fascia, starts from middle of wing, curves outward with edges irregu- 

 lar to dorsum before tornus where it is widest. Before the apex is an irregular brown 

 cloud, the upper larger part ovate, with an outer limb running into termen below mid- 

 dle and an inner limb as several black dots passing through center of ocellus ; there is 

 a faint line from its upper inner edge connecting with a costal spot at outer third. 

 Above the cloud is a small patch of leaden scales. The costa is marked by a brown 

 apical spot and two others above the cloud, the middle one the largest, each contains 

 fine darker brown lines, and the white interspaces are divided by short brown lines. 

 The male costal fold is smoky brown, with two dark brown spots and a paler one at 

 outer end, between this and main costal spots are similar short brown lines or dashes 

 on costa. There are several dark dots on middle of dorsal margin. The brown fascia 

 and spots are usually outlined with blackish brown on their edges. Cilia, internally, 

 gray speckled with brown, outer ends white. 



Hindwing. — Light smoky brown, cilia whitish, with a broadly darker basal 

 shade ; underside the same. Underside forewing brassy brown, with light and dark 

 costal and apical marks repeated. 



Fifteen specimens, Chicago, July ; Ames, Iowa, and Iowa, latter 

 specimens labelled, "Ac. Cat. 118-121-267 C. P. Gillette "; Colorado 



