29 



We distinguish two races of this species, the one apparently con- 

 fined to the southern Atlantic States, the other extending through 

 Texas and New Mexico into Arizona and northward into S. Colorado. 



( I ) M. YUCCAE YUCCAE Bdv. 



Eudamus yuccae *Boisduval & Leconte, Lep. Am. Sept., PI. 70 (1833) (non 

 descr.). 



Castnia yuccae Walker, Cat. Lep. Het. Brit. Mus., VII, 1583 (i8s6). 



Goniloba yuccae Morris, Syn. Lep. N. Am. 113 (1862). 



Aegiale yuccae Kirby, Cat. Diur. Lep. 608 (1871) ; Strecker, Proc. Acad. Nat. Sci. 

 Phil. 149 (1876) ; id., Syn. Cat. N. Am. Macrolep. 163 (1878) ; Skinner, 

 Syn. Cat. N. Am. Rhop. 99 (1898). 



Megatliymus yuccae Scudder, Syst. Rev. Am. Butt. 82 (1872); id., Proc. Am. 

 Acad. Arts, Sci. 213 (1875); Grote, Can. Ent, VII, 173 (187S); *Riley, 

 Tr. Acad. Sci. St. Louis, III, 323 (1876) ; *id., 8th Miss. Rep. Ent., i6g 

 (1876) ; Kirby, Suppl. Cat. Diur. Lep. 829 (1877) ; Riley, Tr. Acad. Sci. 

 St. Louis, III, 566 (1877) ; id., 9th Miss. Rep. Ent. 129 (1877) ; Edwards, 

 Rev. Cat. Diur. Lep. 80 (1884) ; *French, Butt. East U. S. 381, Fig. 91 

 (188s); Comstock, Man. Study Ins. 367 (1895); *HolIand, Butt. Book, 

 p. 367 (1899); Dyar, Bull. U. S. Nat. Mus. 52, p. 46 (1902); Mabille, 

 Gen. Insect, Hesp. 185 (1904); Dyar, Jour. N. Y. Ent. Soc. XIII, 141, 

 (190S); Skinner, Tr. Am. Ent. Soc, XXXVII, 202 (1911). 



"Expanse of wings from 2.5 to 3 inches. Male — Upper surface deep umber- 

 brown, the base of both wings tinged with yellow, the markings yellow. The 

 fore wings have a large spot in the outer end of the cell that is subquadrate ; 

 above this in the interspaces are three small spots in an oblique hue, but little 

 more than mere dots. Beyond these is a submarginal row of spots which be- 

 gin in the usual line of anteapical spots about four-fifths of the distance from 

 the base to the apex, but the two spots opposite the cell are nearer the outer 

 margin, and from these they gradually run till the last one is close to the pos- 

 terior angle. The first of the four anteapical spots is a mere dot, the next three 

 are a little longer than wide, the fifth and sixth are narrow but reaching from 

 vein to vein, the seventh and eighth are in the median interspaces, and the 

 ninth is above the submedian. The last three are somewhat irregularly convex 

 on the inner side, but less so on the outer. Hind wings without spots, but 

 with a yellow washing along the outer margin. Underside deep brown, like 

 the upper, but brighter, the outer portion of both wings pearly gray, with a patch 

 of the same color on the middle of the costa of the hind wings, and a white 

 crescent below it, and the same scales sprinkled along the inner margin and the 

 faint streaks through the wings. The spots of forewings are repeated, but 

 somewhat enlarged, the color paler yellow, whitish in the costal region. Female 

 — The general color and markings of the fore wings as in the male, but much 

 larger. The spot in the cell extends from vein to vein, and inward along the 

 median a Httle way toward the base, the three spots above nearly as long as 

 the spot in the cell is wide. Besides the much enlarged anteapical spots, which 



