MEMOIRS OF THE NATIONAL ACADEMY OP SCIENCES. 265 



Larva. 



(PI. XXXVI, ligs. 1, lrt,2, 2o, 3,3a,fi; XLIX. i3g.2.) 



Griffith, Eiig. Edit. Cuvier's Au. Kiiigduin, xv, 1832, PI. XXXH. fig. 'tn. (Xo ilcscription.) 



Hairi8, Ins. iuj. Veg., Ist edit., p. 305, 1841. 



Lintner, Eut. Coutr., iii, p. 151, fig. 11, May, 1874: : liut. Coutr., iv. p. S4, 1878. 



French, Cau. Eut., siii, p. 145, 1881. 



I'aikiird, Fifth Rep. U. S. Eiit. Comra. Forest Insects, pp. 434, 458, 530, 597 ; 1890. 



Proc. lio.st. Soc. Nat. Hist., xxiv, p. 552, ISIIO. 

 Dijar. Cau. Knt., xxiii, p. 83, April. 1891 (egg and larval Stages II, III, IV, V (and last); cocoon and pupa 

 described.) 



Moth. — Two -5 , one 9 . Female antenna- well pectinated. Head above wliite, each side in front 

 black. Thorax in front to a little beliind the base of the fore wings white, and behind edged with 

 steel-blue metallic scales. Abdomen dull smoky gray, segments edged with white; eiul of S 

 abdomen white, fluffy, with a central dorsal black spot; end of 9 dark brown, clothed witli white 

 and dusky scales. 



Fore wings in S white, in 9 somewhat smoky. The median hlacli band with veri/ irregular 

 edges, both within and without; the band varies in being either narrower or wider on the costa 

 than on the internal edge, and tlie edges are irregular, the band contracting in the snbmedian 

 si)ace and becoming hourglass-shaped, and edged more or less continuously on each side with 

 yellow ocher. A black dot on the common origin of the subcostal and cubital veins; beyond is a 

 series of four black dots forming not a straight but a sinuous line, one of each being situated on 

 the costa, on the cubital and internal veins, aud on the internal edge. 



A roundish, oval, small black discal mark. No diHtinct ej-tradi.scal white hand like that in C. 

 occidentalis, but a subapical black shade ending on the first cubital vein and edged within with 

 dots of yellow ocher, succeeded behind by a black and yellow dot on the first, second, and third 

 venules, and a large black patch edged with yellow within on the internal angle, the yellow spot 

 being continuous with the yellow lining of the outer side of the median black band. The usual 

 marginal row of coarse black dots. 



Hind wings white, with a distinct discal mark; a du.sky patch on the internal edge, and a 

 distinct row of black spots. In 9 the hind wings are somewhat dusky, the discal mark larger and 

 diffuse, and the outer third of the wing dusky white, while the spots in the smoky fringe are 

 black and diffuse. 



Underside: Fore wings of male white, with three large equidistant costal black spots; from 

 the third of these on the outer fourth of the costa a broad sinuous dusky shade crosses the wing, 

 losing itself on the submedian fold. A submarginal dusky costal patch halfway between the line 

 and the apex of the wing. Hind wings white, with a discal dot and one in the internal angle, and 

 with black dots on the base of the white fringe. Fore wings of 9 more dusky than the hind wings; 

 uo distinct siinious line or black costal spots except those near the apex. Hind wings white, 

 with a large diffuse black discal mark on each wing, and traversed by an extradiscal sinuous line 

 of diffuse dark dots. Expanse of wings, t5 3S-i'2 mm., 9 43 mm.; length of body, S 1.3 mm., 

 9 13 mm. My specimens were so labeled by Eiley, also by Edwards and Dyar, and the 9 iu 

 the United States National Museum was so labeled by Mr. Lintner. 



This species may be known by the irregular, hourglass-.shaped median black band edged with 

 ocher, by the inner band of four lilack dots, and by the absence of an extradiscal line. 



The figure in Griffith's Cuvier well represents the female. The statement made by Harris in 

 his description of " C. horcalis,'^ that the outer blackish band "is traversed and interrupted by an 

 irregular, wavy, whitish line,'' shows that he had betbre him an example of C. occidentalis, while 

 those individuals before him with dusky wings and indistinct bands are stated by Lintner to- 

 belong to C. cinerea. 



The caterpillars occurred at Providence," September 18 to 24; one cocooned September 21. 



The following account of the ontogeny, of this species (identified from Professor French's 

 descri])tioii) has been drawn up in part from alcoholic specimens and in part from greatly 

 enlarged and most carefully executed drawings by Mr. J. Bridgham. The different stages- 



