tit 



tinged with brown. Body tapering considerably posteriorly and 

 sparingly clothed with long colorless hairs. L. 2.5 m. m. 



After 1st moult, July 14. Color light green, white exter- 

 nally. The red spots much darker, smaller anteriorly. A white 

 dorsal line, with indications of sub-dorsal ones. Hairs on segs. 1, 

 10, II longer than the rest. L. 5 m. m. 



After 2d moult, July 19. Color as before. Dorsal, sub- 

 dorsal and two lateral white lines. The red spots, dark wine- 

 colored, and replaced on segs. 2 and 3 by tufts of short blackish 

 hairs somewhat below the sub-dorsal line. Several long black 

 hairs on segment i, which protrudes laterally beyond the head. 

 L. 8 m. m. 



After 3d moult, July 23. Bluish green. Lines more dis- 

 tinct. The spots on 4, 5 and 6 smaller and blackish. Hairs com- 

 posing the dorsal tufts, except those on seg. i, 10 and 11 short; 

 lateral tufts long (this applies to all stages). A lateral tuft of 

 long black hairs on seg. i. Head straw colored, edged externally 

 with black, having a broad posterior black band from which two 

 fine black lines diverge to the jaws. Legs and prolegs bluish- 

 green. L. II m. m. 



After 4th moult, July 26th. Ver}- light bluish-green. Sub- 

 dorsal spots minute. Head variously marked with black, light- 

 green or straw color. Else as in the two preceding stages. 



L. 18 m. m. 



After 5th moult, July 30. Much as before ; the sub-dorsal 

 spots hardly visible. In some specimens large suffused dorsal, 

 dirty blackish patches. 



After 6th and last moult, August 6. Ever)- variety of color 

 from clear blue-green to black or dirty brown. Sub-dorsal spots 

 absent. Longitudinal streaks indistinct. Tufting as before ; 

 hairs slender, not stiff, white. A few lateral black hairs on seg. i. 

 Head variously marked from shining black with a few straw 

 colored frontal spots to light straw color. L. 4060 m. m. Cocoon 

 August 15. 



Concealed in a case between two leaves. Rests with the 

 body unbent. The same larva was found on birch and elm. The 

 mature larva has been described by Mr. Sanders in Can. Ent., 

 Vol. I. 



The larva of C. propinquilhiea, which feeds on birch, v»-alnut, 

 maple and oak. is subject to a somewhat similar variation. One 

 specimen found on maple at Mt. Desert, Me., was black, with 

 a dorsal white band, and a lateral white band edged below with 

 black. Beneath white. The long tufts on seg. 2 were clear black 

 instead of red as normally. Other specimens on walnut were 

 mottled with black. 



C. derideyis spins a close outer cocoon of fine pinkish silk 

 and a coarse inner cocoon of brown silk. Imacro in Tune and 

 July. 



