40 



■UNITED STATES NATIONAL MUSEUM BULLETIN 207 



Genera 18-21: Myelopsis to Ectomyelois 



[Venational division C. Forewing with 11 veins; 4 and 5 stalked 

 for half their lengths or less. Hind wing with veins 7 and 8 anas- 

 tomosed for over half their lengths beyond cell (the free element 

 of 8 shorter than the anastomosed stalk of 7-8). TranstiUa of 

 male genitalia complete.] 



18. Myelopsis, new genus 



Type of genus: Myelois coniella Ragonot. 



Tongue well developed. Antenna simple, pubescent. 

 Labial palpus upturned, reaching slightly above ver- 

 tex; second segment somewhat roughly scaled in front; 

 third segment slightly shorter than second, acuminate. 

 Maxillary palpus filiform. Forewing smooth; 11 veins, 

 vein 2 from before but near lower outer angle of cell; 

 3 from the angle; 4 and 5 shortly stalked, the stalk at 

 base separated from 3 for a distance but slightly less 

 than that between 3 and 2 ; 6 from below upper angle 

 of ceU, straight; 10 from the cell separated from 8-9 

 at base, and more or less divergent beyond; male with 

 out costal fold. Hind wing with vein 2 from well be- 

 fore outer angle of cell; 3 from the angle, connate with 

 the stalk of 4-5 ; 4 and 5 stalked for slightly less than 

 half their lengths; 7 and 8 strongly anatomosed beyond 

 cell, the free element of 8 short; cell half the length of 

 wing; discocellular vein curved. Eighth abdominal 

 segment of male simple. 



Male genitalia with apical process of gnathos U- 

 shaped (consisting of a pair of widely spaced, short 

 arms). Uncus stout, more or less triangulate, apex 

 rather narrowly rounded. TranstiUa complete, but 

 weakly sclerotized. Harpe simple; costa strongly scler- 

 otized and projecting at apex (except in subtetriceUa) . 

 Anellus U-shaped, narrowly sclerotized throughout. 

 Aedeagus smooth; penis with sclerotized wrinklings. 

 Vinculmn triangulate, tapering, longer than greatest 

 width. 



Female genitalia with or without signum, latter when 

 present weak. Ductus bursae membranous. Genital 

 opening simple. Ductus seminalis from middle or 

 towards terminal end of bursa. 



This genus comprises several North American species 

 that have been referred to Myelois Hiibner. The latter 

 a heterogenous assemblage of species, very few of which 

 are actually congeneric with the type of genus (medii- 

 lallis Hiibner synonym of crihrella Hiibner). The lat- 

 ter has veins 7 and 8 of hind wing very shortly and 

 weakly anastomosed beyond the cell, the free element 

 of vein 8 correspondingly long and the cell itself over 

 half the length of the wing. It belongs properly in 

 om: venational division B. None of the American and 

 very few of the Old World species that have been as- 

 signed to it are properly referrable to Myelois. The 

 European tetricella SchiffermueUer belongs in Myelopsis. 



71. Myelopsis coniella (Ragonot), new combination 

 FiGTJBES 191, 673 



Myelois coniella Ragonot, N. Amer. Phycitidae, p. 3, 1887; 

 Monograph, p. 1, p. 53, 1893. — Hulst, Phycitidae of N. 



Amer., p. 118, 1890.— McDunnough, Check list, No. 6071, 

 1939. 

 Rampylla nefas Dyar, Ins. Insc. Menstr., col. 10, p. 172, 1922 

 (new synonymy). 



Forewing pale ash gray (on Utah and Nevada spec- 

 imens) to blackish gray; on darker specimens the basal 

 and terminal areas are contrastingly paler than the 

 area between the transverse lines; at extreme base on 

 inner margin an obscure ocherous patch (not distin- 

 guishable on worn or faded specimens) ; antemedial line 

 oblique, white with a broad, black outer border; sub- 

 terminal line sinuate, more or less contrastingly pale 

 and inwardly bordered by a blackish line or varying 

 intensity; discal dots at end of cell usually distinct, 

 separated, black; terminal dots obscure, when distin- 

 guishable, more or less confluent. Hind wing hyaline 

 white to pale smoky fuscous with a fine dark line along 

 termen. Alar expanse, 16-22 mm. 



Male genitaUa with transtilla slender, arched and 

 very weakly sclerotized at the central attachment of 

 its elements. Harpe with costa narrowly sclerotized 

 and projecting a trifle beyond the apex of the cucuUus. 

 Female genitalia without signum; bursa membranous; 

 ductus bursae with some minute scobinations near its 

 junction with bursa, otherwise smooth. 



Type localities: Nevada {coniella, in Paris Mus.) ; 

 Mexico City, Mexico {nejas, in USNM). 



Food plant: Unknown. 



Distribution: United states: Nevada, Montgom- 

 ery Pass (Mineral County, Sept.), Utah, Dividend 

 (Aug.), Eureka (June, Aug.), Provo (July, Aug., 

 Sept.), Stockton (Sept.), Trout Creek (Ibapah Mts., 

 Sept.); Colorado, Glenwood Springs (Aug.); Arizona, 

 Pinal Mts. (July), no definite locality (Aug., Sept.); 

 New Mexico, Gallinas Canyon; Texas, Burnet County, 

 (Mar.), Kerrville (Mar.); Nebraska, Sioux County, 

 (July) ; Michigan, Dickinson County ; Maine, Bar Har- 

 bor (Aug.), Moimt Desert (Aug.). Canada: British 

 Columbia, Kaslo (July, Aug.) ; Manitoba, Aweme (Aug.) ; 

 Ontario, Ottawa (July, Aug.). Mexico: Mexico City 

 (Sept.), Tehuacdn (Sept.). 



A variable species in color but with remarkably con- 

 stant genitalia. Dyar's nefas has much darker fore- 

 wings than specimens from Utah or Nevada but no 

 darker than some specimens from Arizona and New 

 Mexico. 



72. Myelopsis immundella (Hulst), new conxbination 



Myelois immundella Hulst, Phycitidae of N. Amer., p. 117, 

 1890.— Ragonot, Monograph, pt. 1, p. 49, 1893.— McDun- 

 nough, Check list, No. 6068, 1939. 



The type is without abdomen. In size, wing shape, 

 pattern, and general coloration it is like the following 

 species (subtetriceUa) except that the antemedial and 

 subterminal lines of forewing are more whitish and dis- 

 tinct and their dark borders (especially the outer border 

 of the antemedial line) blackish and more strongly con- 

 trasted against the dark groimd color of the wing. The 

 discal dots are also more strongly contrasted. 



The name may represent only a color form of subtetri- 



