188 



UNITED STATES NATIONAL MUSEUM BULLETIN 207 



There are no structural diflferences in genitalia that can 

 be used to distinguish these supposed species. The 

 form of the clasper of the harpe distinguishes Eumysia 

 from any other genus in group II. A similar develop- 

 ment of the clasper occurs in Nephopteryx of group I. 

 In general habitus Eumysia most resembles Ragonotia 

 in the Anerastiinae. 



372. Eumysia mysiella (Dyar) 

 Figures 430, 920 



Yosemitia mysiella Dyar, Proc. Ent. Soc. Washington, vol. 7, p. 



36, 1905. — Barnes and McDunnougli, Contributions, vol. 3, 



p. 199, 1916. 

 Eumysia mysiella (Dyar), Ins. Insc. Menstr., vol. 13, p. 221, 



1925.— McDunnough, Check list No. 6295, 1939. 



Forewing white dusted with blackish fuscous, making 

 the general color a light ashen gray; antemedial white 

 line sinuate, nearly vertical, bordered inwardly from 

 inner margin to top of cell by a broad ocherous bar, 

 this bar preceded by a blackish margin, especially 

 towards inner margin; similar blackish scaling out- 

 wardly bordering the antemedial white line, sometimes 

 faint, but usually distinct towards costa; sub terminal 

 line obscure, more or less shaded inwardly by dark 

 scaling; blackish discal dots (especially the one at lower, 

 outer angle of cell) usually distinct. Hind wing semi- 

 hyaline, white. Alar expanse, 21-27 mm. 



Genitalia with characters as given for the genus. 



Type locality: Stockton, Utah (tj'pe in USNM). 



Food plant: Unknown. 



Disteibtttion: Utah, Stockton (Sept.), Eureka 

 (June); Arizona, Phoenix (Aug.), Tempe (Aug.), Red- 

 ington; New Mexico, Las Vegas (July), Jemez Springs 

 (July). 



373. Eumysia maidella (Dyar) 



Figure 431 



Yosemitia maidella Dyar, Proc. Ent. Soc. Washington, vol. 7, 



p. 36, 1905. 

 Eumysia maidella (Dyar), Ins. Insc. Menstr., vol. 13, p. 221, 



1925.— McDunnough, Check list No. 6297, 1939. 



Similar to mysiella but averaging larger, with dark 

 markings more intensified along the veins and bordering 

 antemedial and subterminal lines, ocherous subbasal 

 bar fainter and in some specimens absent. Alar ex- 

 panse, 27-32 mm. 



Genitalia similar to those of mysiella. 



Type locality: Stockton, Utah (in USNM). 



Food plant: Unknown. 



Distribution: United States: Utah, Stockton 

 (June, July), Eureka (June), Cedar Mts. (Iron County, 

 July); Colorado, Fort Collins; Arizona (Sept.); New 

 Mexico, Fort Wingate (May) ; California, Loma Linda 

 (Aug.). Canada: British Columbia, Kaslo (Aug.). 



Probably not specifically distinct from mysiella. 

 There are no structural differences between them. The 

 character given by Dyar, costa of male forewing "con- 

 cave" (maidella) or "not concave" (mysiella) is purely 

 imaginary. Some females as well as some males of 

 both "species" appear to have the costa slightly concave 

 at middle but this is an optical illusion due to imperfect 



flattening of the wings in their spreading. The differ- 

 ences in size and intensity of markings are slight. How- 

 ever, since we know nothing of the biology of any 

 Eumysia and since such difiFerences may coincide with 

 differences in host plants it seems advisable to keep the 

 names separated for the present. 



374. Eumysia paUidipennella (Hulst), new combination 



Volusia paUidipennella Hulst, Canadian Ent., vol. 27, p. 56, 1895. 

 Trivolusia pallidipennata Hulst, U. S. Nat. Mus. Bull. 52, p. 438, 



1903 (misspeUing). 

 Yosemitia paUidipennella (Hulst) Barnes and McDunnough, 



Contributions, vol. 3, p. 199, 1916. 

 Zophodia paUidipennella (Hulst) McDunnough, Check list. No. 



3606, 1939. 



Paler and averaging smaller than mysiella with dark 

 dusting fainter, giving the wing a more ocherous gray 

 than ashy gray tint; ocherous subbasal bar somewhat 

 more strongly accented. The genitalia of the female 

 type show no appreciable differences from those of 

 mysiella or maidella. The name may represent nothing 

 more than a race or variety but it should be kept specifi- 

 cally distinct until closer relationship is proven. In a 

 series of some 40-odd specimens before me the color 

 seems fairly constant. Alar expanse, 19-24 mm. 



Type locality: Colorado (type in AMNH, ex Rut- 

 gers). 



Food plant: Unknown. 



Distribution: Colorado; Utah, Stockton (June, Aug., 

 Sept.), Vineyard (June, July); New Mexico, MesUla 

 Park (May); California, San Francisco (Apr.), Loma 

 Linda (Apr., Aug., Oct.); Washington, Pullman (July, 

 Aug.). 



375. Eumysia fuscatella (Hulst) 



Zophodia fuscatella Hulst, Canadian Ent., vol. 32, p. 173, 1900. 

 Eumysia fuscatella (Hulst) Dyar, Ins. Insc. Menstr., vol. 13, p. 

 221, 1925.— McDunnough, Check list. No. 6298, 1939. 



Forewing mouse gray; transverse white lines but 

 faintly indicated. Hind wings pale smoky fuscous. 

 Alar expanse, 21 mm. 



Type locality: Los Angeles County, Calif, (type in 

 USNM). 



Food plant: Unknown. 



Known only from the male type. 



376. Eumysia semicana, new species 



Antenna white annvdated with black. Head, palpi, 

 thorax, and forewing white densely dusted with blackish 

 fuscous, giving the moth a predominately slate-gray 

 color with ashy white streakings on forewing in the 

 interspaces between the veins, through the middle of 

 the cell and bordering the upper and lower veins of cell; 

 antemedial and subterminal lines obsolete, indicated 

 only by an obscure, transverse, angulate, dark shading 

 at basal third and a couple of dark spots on costa near 

 apex, from the inner of which a dark shade extends 

 toward cell; base of wing (before transverse shade) more 

 or less clouded by dark scaling; discal spots at end of 

 cell, small, blackish; some obscure blackish dots along 

 termen; cilia fuscous, with a median white band. 



