34 



short, narrow, and conical ; the paronychium is very distinctive, being 

 broad, ribbon-shaped, and without lobes. 



Genitalia. S. The Uncus (PI. IV, Fig. ii) is broad basally, 

 broader than in the previous forms, the lateral cleft at base deep and 

 well defined; from the base to apex the sides approach each other 

 rather evenly, so that the whole presents less the appearance of a 

 shovel shaped process and more that of a truncate cone, with the 

 apex well hollowed out. The Clasp (PI. V, Fig. 3) is of the same 

 general appearance as in yuccae yuccac, the proharpe is, however, 

 more slender, much narrower at the base and less toothed ; the Blade 

 shows the chitinous ridge mentioned in yticcac, but lacks the rounded 

 projection found in this species, the ridge forming merely a rather 

 sharp projecting angle with the dorsal margin of the blade. The Penis 

 (PI. VI, Fig. 10) is almost straight, very slightly bent downward, 

 broadening out apically with a single minute subapical tooth on each 

 side. 



9. The Vaginal Plate (PI. VI, Fig. 4) is comparatively simple 

 in structure. A triangular chitinous flap-like fold contains the vaginal 

 opening; the Lateral fold is much reduced and confined to the central 

 portion of the side and the Alae consist of two chitinous ridges, en- 

 larged distally into a raised wedge-shaped projection or tooth. 



Habitat. Texas (Kerrville) (April) (H. Lacy); New Mexico 

 (Ft. Wingate) (May-June); S. Arizona (Redington) (April, May) 

 (M. Chrisman) ; Colorado. 



M. cofaqui Strecker. 



Aegiale cofaqui Strecker, Proc. Acad. Nat. Sci. Phil., 148 (1876); id., Syn. Cat. 

 N. Am. Macrolep. 164 (1878) ; *id., Lep. Rhop. & Het. 135. pl- XV., Fig. 

 2 (1878); Skinner, Syn. Cat, N. Am. Rhop., 99 (1898). 



Megathymus cofaqui Kirby, Syn. Cat. Diur. Lep. Suppl. 829 (1877); Edwards, 

 Rev. Cat. Diur. Lep. N. Am. 80 (1884) ; French, Butt. East U. S. 386 

 (1885) (partim) ; Dyar, Bull. U. S. Nat. Mus. 52, p. 46 (1902) ; Mabille, 

 Gen, Insect, Hesp. 185 (1904); Skinner, Ent, News, XVII, 112 (1906); 

 id. Tr, Am, Ent. Soc. XXXVII, 203 (1911). 



"female — E.xpanse two and one-sixth inches. Head dark brown ; palpi 

 whitish; thorax brown, mixed with hoary, posterior half, above clothed with 

 yellowish hair ; abdomen brown ; antennae black above, white beneath, termina- 

 tions black. Upper surface of wings blackish brown. Primaries with an ex- 

 ceeding irregular, bright, deep yellow band extending from vein one to the 

 subcostal nervure; the outer edge of this band is rather regular from veins 

 one to four, though further removed from the extreme margin at the latter 



