190 
MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 
Larva. 
(PI. XXV, fig.s. 1, la, lb, Ic, 1(1, le, If.) 
Di/ar, Eut. Amer., V, p. 91, 1889, (fall life history, egg to moth). 
Packard, Fifth Pejt. U. 8. Eut. Coium., p, 157, 1890 (fiill-fed hirva, pupa). 
Proc. Bost. Soc. Xat. Hist., xxiv, ]». 541, 1890. 
Two (? , 1 $ . Pale cinereous. Pronotal scales discolored with ligfueous brown. A. 
broad median thoracic dusky line, succeeded on the abdomen by a dark spot. Fore wings whitish 
ash-gray, with brown scales arranged in streaks; on the costa the streaks are directed obliquely 
toward the outer margin, ending upon the subcostal vein. Toward the apex there are two distinct 
brown streaks, which are parallel to the costa; between and below the second streak there are two 
whitish streaks. A dark brown discal dot is situated upon the lower discal venule; beyond it is 
a brown streak; in the mitltlle of the discal space is a light line wliich passes over the discal dot 
and continues along the lowest subcostal space to near the outer margin. Below the median vein 
the wing is slightly tinged with ocheroiis. Just below the basal portion of the median A^ein is a 
brown streak, and the internal border is mottled and streaked with dark cinereous. The tuft is 
dark brown. The outer edge of the wing is also darker than the discal portion. There are no 
transverse streaks or lines. Hind Avings white, the costa slightly discolored with ashen scales. 
Abdomen nearly concolorous, being a shade darker than the hind wings. Beneath, of an ashen 
hue, with a distinct median black line. Tarsi broadly ringed with dark scales. 
Expanse of wings, $ , 57 mm.; length of body, 9 , 23 mm. 
Edwards’s Janassa coloradensis is a i)ale silver white A'ariety of his Schizitra 2^er((vgulata^ as I 
find by a comparison with his type in the American Museum of Xatural History. 
Egg . — “Griobular and smooth’’ (Dyar). (For a more complete description, see Appendix A.) 
This caterpillar has been already well described in all its five stages, by Mr, H. G. Djmr, in 
Entomologica Americana ( v. p. 91, May, 1889). The points of special interest, noticed by Mr. Dyar 
are (1) that only five eggs in the case observed were deposited on the same plant; (2) the larvm feed 
singly and during Stages 1 and II they “eat only the upper portion of tlie leaf, and their j'ellowish- 
brown color well simulates its withered appearance; (3) subsequently they devour the entire leaf, 
with the exception of the largest A^eins and rest on its edge, where they might be mistaken for a 
curled and discolored portion.” 
Of the structural features and shape of the first stage, as compared Avith the last stage, Mr. 
Dyar gives no detailed account, except referring to a “hump on joint 5,” i. e., the first abdominal 
segment. He now informs me that the tubercles are flat, distinct, Avith long glandular hairs. 
In the second stage the head is said to be “slightly notched on top.” In Stage III the 
imi)ortant observation is made that “the markings of the mature larva noAV begin to be assumed.” 
This is in accordance with what appears to be the rule in this group, i. e., that Avheii the larvm 
reach Stage 111 they feed more conspicuously and then begin to arise the special protectiA^e shape 
and colors of the last stage and also the terrifying movable Avarts or sfiines, if present at all. 
As regards the second stage of this larvai, the following notes on some alcoholic siAecimens, 
kindly loaned me by Professor Eiley and collected by Mr. Bruner in Nebraska, may be of interest. 
Second stage. — Length, 6-7 mm. Head large, deeply indented on the vertex, each lobe bearing 
near the end a piliferous wart. The two dorsal piliferous tubercles on each thoracic segment are 
nearly of the same size, but those of the x)rothoracic pair are considerably larger than the meso- 
thoracic, and the latter are larger than the metathoracic pair. The tubercles on the first abdominal 
segment are a little larger tha7i those on the xu’othoracic segment. Those on the eighth abdominal 
segment arc as large at the base, but not so high as those on the first abdominal segment; and 
those on the ninth segment are quite large, being about two-thirds as large as those on the 
eighth abdominal segment. All the setie arising from the dorsal ami lateral tubercles are decidedly 
clavate at the end. 
Compared Avith ScMzura ipomew of the same stage and size, the head of Janassa is seen to 
be larger and the lobes above more pointed. The shape and xiropoidions of the thoracic and 
abdominal segments are nearly the same, but the paddle-shaped setie are shorter, while the body, 
generally, is stouter. At this stage the two larvie appear to be scarcely generically distinct. 
