Packard.] 1^^ [March 17, 



The larva, July 17, just before moulting. — Length, 7 mm. Tlie head is 

 now small, black, one-half as wide as the body, which is filled out from 

 five days' feeding. The longest thoracic spines are scarcely one-third as 

 long as the body, and all are pale reddish amber at base and on the outer 

 third, the terminal knobs being black-brown. The caudal horn is also 

 pale reddish amber at base. There is now a definite, broad, white, lateral 

 stripe along the abdominal segments (not appearing in the thoracic), 

 which is bordered above by a dark, thread-like, brovvnish, spiracular 

 line, enclosing the spiracles which are minute and difficult to detect. 

 Above the spiracular line is a linear distinct white line, and above this 

 is the pale-green subdorsal stripe, diffusely edged on each side with a 

 darker tint. There is a median, small, rounded, amber-colored, dorsal 

 tubercle on the ninth segment, which is double, bearing two bristles. 

 The end of the suranal plate is reddish amber, bifurcate and bearing 

 black bristles. There is a dark patch on the outside of the anal legs. 



Stage 11. — Moulted July 18 and 19. Length, 10 mm. The head is now 

 high, slightly angular on the sides ; black-brown with a light-brown 

 or greenish lateral stripe on each side, diverging from the light-green ver- 

 tex to the antenme, the two stripes varying from pale brown to green. 

 The great spines (both thoracic and caudal) are of about the same propor- 

 tions and colors as in Stage I, except that the eight thoracic spines, which 

 are still no shorter in proportion to the body, are not so much swollen at 

 the end, the bulb being shorter and broader, and the spines larger, mak- 

 ing a more decided fork, and thus resembling those of Eacles imperialis. 

 On each of the abdominal segments there is a posterior, transverse row of 

 six dorsal, distinct, piliferous, conical warts, there being only two minute 

 ones in Stage I. The anterior series of piliferous tubercles on each seg- 

 ment are now rather large, conical, t7ie two dorsal ones large and stout, 

 twice as large as the subdorsal and lateral ones, and all being lemon-yellow 

 (less greenish than before) bearing a terminal black spine, and with 

 a second piliferous tubercle growing out from the side. 



The dorsal lines have almost disappeared, there being a subdorsal, pale, 

 almost whitish line, besides a faint, narrow, dorsal, greenish line. The 

 lateral ridge is now pro7ninent, and bright lemon-yellow, forming a distinct 

 broken line, bearing in the middle of each segment a very slender, black- 

 ish, piliferous wart. A dark reddish purple, narrow, spiracular line ; 

 between this and the 3'ellow line is a white stripe and another narrower 

 one above it, while still above is anotlier reddish purple line. Otherwise 

 tlie markings are the same, the suranal plate, however, is edged with 

 lemon yellow, Veing the continuation of the lateral yeilow band. 



Thoracic and abdominal legs "green tipped with brown " (.Jewett). 



In this stage upon touching or teasing the larva the thoracic spines 

 spring out, at the same time the head together with the thoracic region 

 jerk violently, as if to beat oflf an intruder. Also when two caterpillars 

 meet they evidently attack each other, butting and striking with their 

 horns, like two hostile goats, deer or cattle. It seemed evident, after 



