102 



Length of body, S, 0.37-0.45, 9, 0.35; of fore wing, <?, 0.52-0.56, 9, 

 0.48; expanse of wings, L.00— 1.20 inches. 



Hopedale, Labrador (Packard); Quebec, Canada (Belanger); Bruns- 

 wick, Me. (Packard); "Lake Athabasca" (Kennicott, Grote); "St. .Martin's 

 Falls, Hudson's River, Trrr." (Walker) ; Turkey Creek Junction, Colorado, 

 .June 27 (Mead); Kenay, Alaska I Behrings); Kodiak Island, Alaska (Edwards). 



This easily recognizable species may be known by the uniformly black 

 wings, with the broad white band in the middle of both wings; the band vary- 

 ing much in width, and sometimes entirely wanting on the hinder pair. 



Compared with an Alaskan example, a Colorado one is larger, with the 

 white band on the hind wings three times as wide, thus leaving a narrow, 

 dark margin, and a faint, dusky shade at the base of the wing. I had regarded 

 the Alaskan and Maine specimens as quite distinct, and the latter as distinct 

 from the Labrador var. obductata; but a Pacific-coast specimen, received 

 from Mr. James Behrings, labeled "Kenay" (near Kodiak, Alaska), is inter- 

 mediate between vars. kodiakata and obductata. The Pacific-coast individual 

 has the white band on the fore wings much bent, as in Maine specimens, 

 and the hind wings almost black, as in var. concordata; the white line being 

 almost obsolete. The Labrador individuals are more stunted than the Maine 

 ones, but both have black bind wings: while the Pacific-coast and Colorado 

 examples are much whiter, with broader white bands. The Alaskan moth 

 closely resembles Duponchel's figure. Thus the Pacific and Colorado forms 

 resemble the European much more than the New England and Labrador 

 examples. It inhabits Central Europe, Lapland, the Ural and Altai Mount- 

 ains, and Amur. It is leported by Grote as having been collected by Ken- 

 nicott along the route from the Mackenzie River to Lake Athabasca. 



Rheumapteha teistata Packard. Plate !>, fig. !». 



Phalcena-Gcometra tristata Linn., Syst. Nat., x. 526, 1758. 



" liorkh., Schm. Eur., v. 430, 1794." 

 JSulppe tristata Hiilm.. Verz., 326, 1818, 

 (Maria tristata Treits., Schm. Eur., vi di), 210, 1828. 



Mclanippe tristata Dap. (" in part"), Lcp. France, viii (v), 291, pi. 190, fig. .">. 1830. 

 ffarpalyce tristata Steph., 111., iii, 223, 1831. 

 Uelanippt tristaria Boisd., Gen. Intl., 216, 1840. 

 I.arinlia tristaria 1 l.-Srli., Si-luii. l'.m.. ni. 156, L847. 

 Velanthia tristata Stepb., Cat Br. [ns., 213, 1830, 

 Melanippi tristata Gncn. (" in part "), l'lnil.. ii, 390, L857. 



Walk., Lis! Lop. U.i. Br. Mus., xxv, L283, 1862. 



•"» 9 — A small black species. Fore wings black, with a wavy, curved, 



