iiulist iiu'll\ liinitfd. Orviculiir v«Ty iilili(|iic, .il I .liniiiL: i>i- I'lisin^^ willi llic 

 H'liifonii iiiffriorlv. piiU', with itxiist iml (l.irkn- inU rior sli;i(lcs. I! en i lortii 

 upright, nuuliTiilf, with djirkcr criilci- .iiid |i;ilr ochrcN ringed. The nii'di.in 

 .si);n'c is sliMih'd with lilncUisI) |)(istcri(iil\ . Snlisl crniin.d line disliiicl .ind 

 <'(i!dimu-d. prcri'tU'd l)y ii djirk costid slifidc ri-lifviiifi (wo costfd |);ilc dots. 

 'l\Tiiiiii;d liiu- fvcii; frin^^fs dark. Hind wings yellow witli yellow friiifrcs 

 iind .1 l)n>;i(l iil.ick nuirfriii. wliieh itdnides more or less on the cetdral 

 \ello\\ held. Bene.dh the hind wings are yellow with narrower hl.ick hind 

 horder and faint diseal point; costal region dnsky. I''ore \\ings witli the 

 center blackish, costal and tcrininal regions hrowinsli, \aiying in tone with 

 the upper surface. 'I'he iiody colors vary in lone with the fore wings 

 and tile black margins of llic hind wings \ary in width, sometimes en- 

 croaching strongly on the yellow diseal (leld. l',N)ianse .'30-.'3'l' """. 



l'"ive specimens h:\\r been examined which were collected by Mr. 

 C'oiiper on the Island of Anticosti. The only dcscriix-d North American 

 .species with yellow secondaries, and one which wonid have been referred 

 to "Trijihaena" before the strnilnrc of lliese moths w'as studies. Profes.sor 

 Zeller has kin<ll\ compared llic species for mc with the .Siberian A. 

 Chardinyi. to which if is .diicd. Ind from which the I'rofcssor distingui.shcs 

 it sjieeifically. 



Typk Locality: Anticosti Island. 



Xcmukii and Skxk.s ok Typks: (".5 specimens from Mr. Coiii)er"). 



TvrF.s in: 1 ^,1 9, "Types," liritish .Museum; 1 ^, "Type," in .Mor- 

 ri.son's handwriting, without type number, National Museum. 



Specimkns Kxamined: Total, .'37; from, Calgary, Alberta; Arrow- 

 head Lake, 13. C; Banfl", .Vita.; Cartwright, Manitoba; Hymers, Ontario; 

 Digby, Nova Scotia; Ft. Calgary, X. \V. 'I'err. ; Maine; Jefferson, X. H.; 

 Franconia, X .H.; Peru, X. Y. (Husavick, Man. and Peachland, B. C, Mr. 

 Walli.s.) (Dublin .Shore, X. S., Mr. Engelhart.) 



CiKNiTAiic .Si.n)Ks: 1, Peru, X. Y. 



This is tlic only Ayrotid in the fauna of Boreal America witli 

 briii'lit yellow-oranije hind wings, margined terminally by a broad 

 black band: and with the fore tibiae unspined. 



It is interesting to note that the male genitalia are decidedly 

 ditierent. and in some resjDects at least, far more rudimentary than 

 those of any species of the genus Lampra ' -'""led by the author. 

 The valves are short, lobate, without ar'i- "'^ ampulla of the 

 clasper is very strongly chitenized. long ana c and the sacculus 



is not definitely present. While the author •• id not attempt to 

 base genera on genitalic characters of the m. j, such a strikingly 

 different genitalia appears vastly significant. 



The author has followed Sir George Hampson in considering 

 that gilvipennis and chardinyi deserve a genus to themselves. The 

 necessity for the designation of a new generic name in place of 

 Hampson's usage of Rliynchagrotis is fully explained in the in- 

 troduction to the genus Lampra. Suffice it here to repeat that 

 Rliynchagrotis. Hamp.son (Smith in part) is invalid for application 

 to rjUvipennis and chardinyi, Dr. Smith having fixed the type of 

 Rhynchagrotis as ciipidaj (Bull. XXXVIII, U. S. N. M., page 9). 



The characters given herewith ; in the generic description copied 

 from Hampson. with additions and corrections ; together with the 

 original description ; completely cover all specific characters for 

 gilvipennis. The habitat of true chardinyi, E. Prussia to W. Si- 

 beria, throws it out of the range of species treated in this paper. 



