66 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxi. 



ACRONYCTA PACIFICA, new species. 

 (Plates XI, iig. 5, male adult; XX, fig. 2, male geuitalia.) 



Ground color a i)owdery ashen gray, in which all the markings are 

 more or less obscure. The transverse anterior line is feebly tiaceable, 

 geminate, twice outcurved, so that the inward angulation in the sub- 

 median inters[)ace connects with the black basal streak. The median 

 shade line is marked on the costa by a smoky blotch. The transverse 

 posterior line is even, smoky, bisinuate; best marked in the submediau 

 interspace, where it is crossed by a slender black dagger mark; sub- 

 terminal line wanting.. The fringes are cut by smoky lines opposite 

 the interspaces. The orbicular is very small, oval, jnarked by black 

 scales, and may be scarcely traceable. The reniform is also indefinite 

 and consists of a shapeless smoky mark. Bej^oud the transverse pos- 

 terior line the wing is somewhat more densely powdered and seems 

 darker. The secondaries are white in the male and only a little smoky 

 in the female. On the underside the wings are white, with discal 

 marks and an outer line on each. 



Expanse, 1.50 to 1.75 inches (37 to 45 mm.). 



Hahitat. — California. 



Three males and one female are before me. All of the specimens 

 are directly or indirectly from the Henry Edwards collection. Two of 

 them are from the American Museum of Natural History, numbered 

 9615. One is labeled Sierra Nevada, while the solitary female, from 

 the collection U. S. National Museum, is simply labeled California. In 

 genital structure the species much more nearly resembles the popnli 

 series than frigida, although in markings it approaches most closely 

 to some pale specimens of the latter. The harpes are very broad, and 

 widen toward the tip, Avhile the clasper is very long, slender, and 

 pointed. 



ACRONYCTA INSITA Walker. 



(Plates IV, lig. 3, male adult; X, tig. 8, male adult; XVII, fig. 13, leg; XIX, fig. 16, 



male geuitalia.) 



Acronycia iiisita Walker, Cat. Brit. Mus., Het., 1856, IX, p. 61. — Grotk, Papilio, 

 1883, III, p. 111. 



Ground color white, strongly black powdered, giving the creature a 

 somewhat bluish ash-gray appearance. Head and thorax without dis- 

 tinct markings. Primaries with the ordinary lines more or less indefi- 

 nite, but all of them marked on the costa. There is a distinct black 

 basal streak, which usually extends to the point at which the trans- 

 verse anterior line is ordinarily found; but sometimes it is abbreviated 

 and in one specimen very slightly marked. The basal line is indicated 

 by a black dot on the costa. The transverse anterior line is indicated 

 by a black spot on the costa, by a more or less indistinct angular mark 

 below the cell, and sometimes by a blackish mark on the inner margin. 

 Sometimes the costal spot only is j^reseut. A distinct black spot near 



