112 MEMOIRS NATIONAL ACADEMY OF SCIENCES. vol. xn, 



COLORADIA PANDORA Blake. 



Plates XX, fig. 8; XXI, fig. 1; LIV, fig. 6; LXI, figs. 1, 2 {pandora), 3, 4 (loiperda), 5, 6, 11, 12 (dans). 



Coloradia pandora Blake [Proc. Ent. Soc. Phila., II (1863), p. 279]. 



Imago. — Four 3 , one 9 . Body dark vandyke brown, with a roseate patch on each side 

 of the collar, while the femora are clothed with roseate hairs. 



Fore wings brown with gray scales; a diffuse indistinct band, situated midway between the 

 base of the wings and the distal patch, but nearer the latter. An obbque broad diffuse indistinct 

 slightly sinuous extradiscal band, beginning on the outer third of the inner edge, and ending 

 on the outer fourth of the costa. The costal and outer edge darker than the rest of the whig; 

 the fringe is white at the ends of the veins; a large round solid black discal spot. Hind wings 

 paler, more translucent than the fore wings, with a smaller discal spot, and an extradiscal 

 slightly curved diffuse line beyond, and a similar parallel submarginal line. Outer edge of the 

 wings dusky and gray with venular marginal white spots; the inner edge roseate. 



Under side of the fore wings suffused with roseate. In the 9 no rose-colored scales on the 

 inner edge of the hind wings. 



Expanse of the fore wings, <? 80 mm.; 9 80 mm. 



Length of a fore wing, t? 36 mm. ; 9 39 mm. 



Breadth of a fore wing, c? 18 mm.; 9 19 mm. 



Length of a hind wing, S 28 mm.; 9 28 mm. 



Breadth of hind wing, S 20 mm.; 9 19 mm. 

 Although not an especially variable species, it varies in the presence of the rose-red scales; 

 in two males the roseate patch on each side of the collar is wanting; in one 3 there are no 

 rose-colored scales on the inner edge of the hind wings, and very few in another & . 



A local variety occurs in Colorado, regarding which Mr. David Bruce writes me as fol- 

 lows: "Var. doris. This name was never published, I believe. Mr. Neumoegen proposed it 

 for a small thick-winged dark form I took many of hi Garfield County, Colo." [This was pub- 

 lished as doris Barnes, based on one of each sex labeled "Colorado (Bruce)."] 



[Another form is loiperda Dyar, Proc. Entom. Soc. Washington, XIV (1912), page 105. 

 It is denned as "Similar to pandora; smaller, the hind wings whitish in ground and nearly 

 without the red tint; fore wings more densely irrorated with white." Described from four 

 males and one female from Colorado, the only one with exact locality being from Glenwood 

 Springs (W. Barnes). I possess a female from northern New Mexico (probably Santa F6 or 

 vicinity), which resembles loiperda, although the hind wings have the anal margin broadly 

 suffused with rosy, and the anterior wings lack the distinct sub apical dusky marks. On com- 

 paring it with the types of loiperda I find that it is certainly distinct, differing especially by the 

 dusky hind wings with strong pink color basally, and the lack of well marked white spots on 

 fringe of hind wings. It seems not to differ from the tattered female cotype of C. lois.) 



Egg. — Rather large, slightly flattened, spherical, surface of the shell'smooth under a lens; 

 shell pearl-colored, rather thin; the sutures of the larva visible through it. Length 2.5 mm.; 

 breadth 1.8 mm. The eggs were received at Brunswick, Me., July 26, and hatched out August 

 26, the larvae beginning to eat through the shell, seven appearing by 10 a. m. August 27, while 

 some hatched as late as September 1. [See also Henry Edwards, Entomologica Americana, 

 IV (1888), p. 61.] 



Larva. — Stage I: Length 5 mm. Head large, a little wider than tho body, smooth shining 

 jet black, the latter rather short and thick, of the same general shape as in Hemileuca, slightly 

 tapering toward the end. The body is at first honey-yellow, as are all the spiniferous tuber- 

 cles at first, gradually becoming darker. There are six prothoracic spines, the two median 

 dorsal ones on this and the second and third thoracic segments being rather deeply forked, 

 and the single seta arising from each tubercle is finely spinulose, and nearly twice as long as 

 the spines themselves. As the body darkens the tubercles remain pale, as also the suranal 

 plate, and all the abdominal legs. The thoracic legs are black, though at first honey yellow 



