After 5th moult, July 29. Colors more intense, the yellow 

 and red of the dorsal spots contrasting strongly. In a few speci- 

 mens seg. 8 has in all the above stages a dorsal spot less con 

 spicuous than the rest, otherwise as in 5th stage. L. 30 m. ni. 



After 6th and last moult, August 2 (Mature larva). General 

 color mottled-brown and greenish like bark. A dorsal black band 

 contracted between each segment, containing a central dorsal 

 white line. On segs. 4, 7, 8 this band forms a transverse dorsal 

 hump edged with deep black and set with a few short white hairs. 

 Above and below the stigmata are whiie, setiferous tubercles 

 bearing whitish hairs. Segs. 1, 2 and 3 are set with tubercles 

 bearing longer hairs than the others, which are directed anteri- 

 orly. A diagonal black mark suffused on segs. r,2, 3 runs superi- 

 orly and posteriorly just above the stigmata. Stigmata black, 

 ringed with white. Head black anteriorly, dull carmine or orange 

 posteriorly, with a central, arrow-shaped light brownish mark, 

 and with several lateral whitish streaks. Legs greenish. Prolegs 

 black. Beneath dirty greenish. L. 50 m. m. 



This last moult is somewhat interesting, as with its change 

 of color a corresponding change of habit supervenes and the 

 larva, instead of resting on the upper surface of the leaves on 

 which it spins a slight web, as in the preceding stages, betakes 

 itself to the crevices of the bark, when it becomes almost invis- 

 ible. 



The black and brown tints do not appear immediately after 

 the last moult and the larva differs little from the preceding stage 

 till it has been exposed to the air for some time, the dark tints 

 gradually appearing after several days. The same is the case in 

 A. furcifera and lobelicE and also in Thyreiis abbotii, the early 

 stages of all these being adapted to leaves, the last t® bark. 



In their early stages the larvae of A. morula, furcifera, Rad- 

 cliffii, and clarescens can hardly be distinguished at a glance, and 

 all, except the last species, produce striking changes of color after 

 the last moult. 



The cocoon of morula is spun under loose bark or in the 

 crevices, and can often be found on the trunks of old elms, though 

 I have found the moth somewhat rare. The present brood 

 began to spin August 9, producing a single imago September 7. 

 The remaining cocoons will hybernate. The moth appears in 

 June and July. The same larva was found on linden September 

 15. 



Apatela vulpina. Grote. 



Before last moult. Body greenish-white, darker hiferiorly, 

 thickly clothed with long white hairs, slightly tinged with yellow. 

 A jet black, rather short, thick black tuft on the median dorsal 

 portion of segs. 4, 6, 7, 8 and 11. Head light greenish with a 

 black dot on the frontal portion, each side of the median line, 



