MEMOIRS OF TUE :JJx»lTIONAL ACADEMY OF SCIEXCES. 265 



Larva. 



(PI. XXXVI, tigs. 1. In, 2, 2n, 3, 3a, 6; XLIX, fig. 2.) 



Griffith, Eng. Edit. Cuvier's An. ICiugilom, xv, 1832, PI. XXXII, fig. Txi. (Xo description.) 



Uan-in, Ina. iuj. Veg., 1st edit., p. 30.5, 1841. 



Liutiici; Eut. Contr., iii, p. 1.51, tig. 11, May. 1874 ; Ent. Coutr., iv. p. 84, 1878. 



Ffcncli, Can. Eut., xiii, p. 145, 1881. 



Packard, Fit'tli Rep. U. S. Eat. Comm. Forest Insects, pp.43 i, 458, .jliO,. 597; 1890. 



Proc. Bost. Soc. Nat. Hist., xsiv, p. 5,52, 1890. 

 Dijar, Can. Ent., xxiii, p. 83, April, 1891 (egg and lar^-al Stages II, III, IV, V (and last); cocoon and pupa 

 described.) 



2lQi]i. — Two -5 , one 9 . Female antenniB well pectinated. Head above white, each .side in front 

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

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

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

 and dusky scales. 



Fore wings in i white, in 9 somewhat smoky. The median hlaclz hand with very irregular 

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

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

 space 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, and on the internal edge. 



A roundish, oval, small black di.seal mark. Xo distinct extradincal irhite hand Ul-e 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 witli 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 dusky 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; 

 no distinct sinuous 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 diffu.se dark dots. Expanse of wings, S 38-42 mm., 9 43 mm.; length of body, S 13 mm., 

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

 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 baud of four black dots, and by the absence of an extradiscal line. 



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

 his description of " T. horealis,''^ that the outer bhickish band "is traversed and interru])ted by an 

 irregular, wavy, whitish line,'' shows that he had before 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. cinerca. 



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 

 description) 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- 



