374 Explmiation of Plates. 



obvious, produced no effect whatever. The appearance 

 of this same larva just before hybernation is represented 

 in Plate XVII, fig. 4 or 9. The painting of the nearly 

 mature larva was made on May 14th. 

 FlG.^2. Larva, small but probably in the last stage, exposed to the 

 same environments (II. G) both before and after hyber- 

 nation, as that represented in fig. I. Here too it is 

 clear that the black-barked twigs which surrounded the 

 larva during winter and qiring produced absolutely no 

 effect. The appearance of the same larva just before 

 hybernation is represented on Plate XVII, Fig. 6. The 

 painting of the more mature larva was made on 

 May 28th. 



3. Larva, nearly mature in the last stage, showing the effect 



of lichen-covered sticks throughout (II, F). The lichen 

 was probably Ranvalina farinacea. The appearance of 

 this same larva just l>efore hyljemation is represented in 

 Plate XVII, fig. 4 or 9. The painting of the nearly 

 mature larva was made on May 25th. 



4. Larva at the same period and exposed to the same 



environments both before and after hybernation as that 

 represented in Fig. 1. The larva here represented (from 

 II. E) was the darkest of all the mature larvae which 

 had Ijeen exposed to an environment of lichen before 

 hybernation (series II). There is no reason to sup- 

 pose that the black twigs produced any effect in winter 

 and spring. The larva was one of the seven darkest 

 in series II before hybernation. The painting was made 

 on May ITth, 



5. Larva, nearly mature in the last stage, showing the effect 



of reddish-brown stems of bramble throughout (III, K). 

 The specimen represented was one of the four more 

 spotted or lightest larvje before hybernation, and the 

 same relationship towards the other divisions of this 

 series (III) was maintained during and after hyberna- 

 tion. The painting was finished on May 11th. 



6. Larva, nearly mature in the la?t stage, showing the effect 



reddish-brown stems of bramble before hybernation. 

 Dnriug and after hyl^mation the larva was placed in an 

 environment of black-barked twigs (III, J). It had 

 been one of the uniform brown larva? before the winter, 

 and there is no reason for the belief that the black twigs 

 introduced later produced any effect. The painting was 

 '^ finished on Mav 11th. 



