672 PROCEEDINGS OF THE NATIONAL MUSEUM vol. ii4 



represent an entirely different species with which I am not familiar. 

 Thus, I am in doubt as to the correctness of the association between 

 this specimen and the slide mount of the genitalia. The name refers 

 to the characteristic sickle-shaped aedeagus exhibited by this species. 



46. Acrolophus variabilis (Walsingham) 



Figures 208-213 



Ortholophus variabilis Walsingham, 1887, Trans. Ent. Soc. London, p. 169, pi. 8, 

 figs. 24, 24a, 24b, 24c, June. — Beutenmiiller, 1888, Ent. Amer., vol. 4, no. 2, 

 p. 29. — Smith, 1891, List Lep. Bor. Amer., p. 95, no. 5065.— Dyar, 1900, 

 Can. Ent., vol. 32, no. 10, p. 310; 1900, Can. Ent., vol. 32, no. 11, p. 327; 

 1903, List North Amer. Lep., p. 579, no. 6598.— Walsingham, 1915, Biol. 

 Centr.-Amer., pt. 12, vol. 4, pp. 378, 38^386. 



Acrolophus variabilis Barnes & McDunnough, 1917, Check List Lep. Bor. Amer., 

 p. 191, no. 8188.— Eyer, 1924, Ann. Ent. Soc. Amer., vol. 17, no. 3, p. 315, 

 pi. 35, fig. 4.— McDunnough, 1939, Check List Lep. Can. & U.S. Amer., 

 p. 103, no. 9578. 



Walsingham's original description follows: 



Ortholophus variabilis — Labial palpi, cf , erect, not recurved, dirty whitish, more 

 or less tinged with greyish fuscous, with which they are sometimes entirely 

 suffused, about 3}i mm. long, separately tufted on each joint; 9 porrect, standing 

 out about 2 mm. beyond the head. Antennae subochreous; cf serrated; ? simple. 

 Head, thorax, and fore wings dirty whitish, sprinkled and suffused with greyish 

 fuscous, varying with the colour of the fore wings. Fore wings elongate, narrow, 

 the costa slightly rounded, apex rounded, apical margin oblique, convex, presenting 

 several varieties of colouring; apical vein not forked. Var. a. dirty whitish, 

 mottled along the apical and costal margins with greyish fuscous; a triangular 

 fuscous patch overlapping the fold, and more or less connected with a spot of the 

 same colour at the end of the cell; fringes mottled alternately greyish fuscous and 

 dirty white both in fore and hind wings. Var. 0. greyish fuscous, with scarcely 

 any admixture of whitish scales, the darker fuscous patches distinctly visible, and 

 a few brownish ochreous scales on the disc. Var. y. pale greyish fuscous, the dark 

 patches almost obsolete, with no admixture of whitish scales, except in the fringes. 

 Hind wings in all the varieties brownish, with a slight purplish tinge; the fringes 

 scarcely paler. Abdomen pale greyish fuscous; lateral claspers of nearly even 

 width from the base outwards, slightly angulated downwards about their middle, 

 the ends rounded, but more so below than above; uncus single, evenly bent over, 

 but very little longer than its opposing branch coming from beneath it. Exp. al. 

 (?, 24-27 mm.; ? , 30-34 mm. 



I have a considerable series of this species collected by Morrison in Arizona, 

 and had always regarded it as equivalent to mortipennella, Or., the only described 

 species with whitish fore wings and darker hind wings; but Mr. Grote's remark 

 that in his species the labial palpi reach as far back as the dorsum of the thorax 

 proves that it is distinct. 



Walsingham's illustrations consisted of: figure 24, the adult cf in 

 dorsal aspect (in color) ; figure 24a, the head of the cT in lateral aspect; 

 figure 24b, the head of the 9 in lateral aspect; and figure 24c, the cf 

 genitalia — the uncus, gnathos, and the cucuUus of the harpe in lateral 

 aspect and the uncus in dorsal aspect. 



