838 Professor E. B. Poulton on colmir-rclation 



II. G. quercifolia. 



October iQth. Larvse with lichen-covered sticks. Many 

 of these larva? had also undergone considerable chancres 



. . . ^ 



since September 21st ; so much so indeed in certain cases, 

 that two of the examples set aside for painting had to be 

 changed for others which better represented the appear- 

 ance borne by the former when they were selected. Of 

 the 4 lightest larvse on September 21st only one remained 

 greyish (painted October 2nd, shown in Plate XVII, fig. 6); 

 2 were now of a brownish tinge (painted October 3rd, fig. 

 4, and October 7th, fig. 9, Plate XVII) ; while the 4th 

 had become so much darker that another brownish larva 

 was substituted for painting (painted October 6th, fig. 5, 

 Plate XVII). The latter was not, however, as light as any 

 of the other 3 set aside on Sept. 21st. Of the other 2 

 darker larva? previously selected for painting, the one with 

 bluish-white spots had altered, and another more like its 

 former appearance was substituted (painted October 9th, 

 Fig. 8, Plate XVII). The remaining 6 dark, white-marked 

 unpainted larvfe had not changed, except that the white 

 marks upon two of them had become smaller and less 

 conspicuous. 



These 6 larva?, with the dark, white-marked one which 

 was painted on October 10th, and is shown on Plate XVII, 

 fig. 7, were divided into two groups for hybernation. 



D. Four dark, white-marked larvae, including the darkest 

 larva of all the 7 with the smallest white spots, were 

 enclosed with lichen-covered sticks. 



E. Three dark, white-marked larvpe, including the 

 darkest larva but one of all the 7, were enclosed with 

 black twigs of the Turkish oak. 



The 3 lightest larvse were thus treated. 



F. One la.rva was enclosed with lichen-covered sticks 

 (Plate XVII, figs. 4 or 9). 



G. Two larvae,, including the greyish one (Plate XVII, 

 fig. 6), were enclosed with black twigs. The other larva 

 is represented in Plate XVII, figs. 4 or 9. 



H. The two remaining larvae which had been substituted 

 for painting, viz. the brownish larva (Plate XVII, fig. 5), 

 and the dark one with bluish-white marks (Plate XVII, 

 fig. 8), were enclosed with lichen-covered sticks. 



