528 PROCEEDINGS OF THE NATIONAL MUSEUM vol. ii4 



Antennae dull greyish ochreous; cf compressed, ovate, pilose, having a serrate 

 appearance owing to lines of partially raised scales on their anterior sides; ? 

 simple. Head, thorax, and palpi with an equal admixture of hoary and greyish 

 fuscous scales. Fore wings greyish fuscous, profusely sprinkled with hoary scales, 

 which predominate in a patch below the middle of the fold; a sprinkling of dark 

 fuscous scales is also noticeable, especially along the costa, where they form a 

 series of small dots, and at the outer end of the cell, where they are concentrated 

 into an ill-defined dark fuscous patch; a smaller dark fuscous patch occurring 

 beyond the middle of the fold. In the fringes patches of hoary and greyish 

 fuscous scales alternate with each other. The apical vein is forked. Hind wings 

 reddish brown; fringes cinereous. Abdomen cinereous; lateral claspers atten- 

 uated in the middle and widened posteriorly, their ends rounded above, obtusely 

 angulated below. The uncus is bent over and is single, but a supplementary 

 point with a double stem in the form of the lower mandible of a bird, coming 

 from below it, reaches nearly as far as the uncus itself. Exp. al. 26 mm. 



Three males and one female received from Morrison, collected in Arizona. 

 This species may be distinguished by its almost square-ended lateral claspers, 

 and by the length of the opposite branch of the uncus, which, although it occurs 

 in other species, does not appear to attain the same proportions; the forking of 

 the apical vein and the single uncus separate it from other species having much 

 the same general appearance. 



Walsingham's illustrations consisted of figure 2, cf genitalia — uncus 

 and cucuUus in lateral aspect and uncus, gnathos, and cucuUus in 

 dorsal aspect; figure 2a, head of 9 in lateral aspect; and figure 2b, 

 neuration of forewing. 



Male genitalia. — Vinculum rather large but typical, as in 

 other species. 



Teguinen narrow, glabrous; lateral arm gradually and evenly nar- 

 rowing to point of articulation with vinculum, margins sublinear, 

 caudal margin very heavily sclerotized; dorsal area considerably 

 constricted caudad, mesal portion fusing caudad with base of uncus. 



Harpe simple. Ventral aspect: approximate basal two-thirds di- 

 verging caudad from meson of genital capsule, approximate apical 

 third converging caudad toward meson. Lateral aspect: rather elon- 

 gate and broad. Costa and sacculus fused, comprising approximate 

 basal two-thirds of harpe, glabrous except for punctate and setose 

 subdigitate ventrocaudal margin of sacculus, broadest in area caudad 

 of point of attachment of arm of transtilla, basal portion evenly 

 narrowing to rather narrow basal extremity. CucuUus set off from 

 costa and sacculus by areas of reduced sclerotization, comprising 

 approximate apical third of harpe, ventral portion of ental surface 

 heavily punctate and setose, remainder and especially dorsal margin 

 very sparsely punctate and setose, base constricted and with very 

 heavily sclerotized dorsal margin, central and apical portions very 

 broadly and evenly expanded dorsad and less broadly expanded ven- 

 trad to give marked capitate appearance, apical portion about twice 



