letivccn lepidopterous larviV and their surroundings. 355 



rather darker. Tliese 2 larv;x3 were upon the whole 

 somewhat lighter than those in F and H. 



H. The larvie with hluish-iohite spots exposed to lichen- 

 covered sticks throughout. — This larva was dying. It was 

 now lighter than the larva in F, but this difference was 

 entirely due to changes in the latter. 



III. THE QUERCIFOLIA LARV^ WITH BROWN BRAMBLE- 

 STEMS BEFORE HYBERNATION. 



I. The 4 uniform larvm -with lichen-covered sticks during 

 and since hybernation. — Three larvae were in the last stage, 

 2 of them brownish with small white spots like those in K, 

 but with the ground-colour darker. The 3rd was con- 

 siderably darker. The 4th larva was changing its skin. 

 It possessed a deep brownish-black ground-colour, which 

 appeared to be overspread with grey. 



J. The uniform larva with black Pioigs during and since 

 hybernation. — The larva was very large in the last stage, 

 and very uniformly dark and unspotted, although rather 

 less black than those which had been exposed to black twigs 

 before hybernation (I). 



K. The 3 spotted or lighter larviB upon brown stems 

 thro^i.ghout. — Two larvae in the last stage were dark 

 brownish with small light patches. The third, in the last 

 stage but one, was more black-and-white, resembling the 

 larvae which had been exposed to black twigs before 

 hybernation (I). 



Compared as a whole the larvae of I were blacker than 

 III, although these were very dark. The latter were 

 distinguished by greyish-brown shades absent from the 

 ground-colour of I. The light patches, when present, 

 were distinguished in III by a brownish tinge, and were 

 more clouded and less distinct than in I. 



Comparing carefully the darkest larva of II (viz. the 

 4 darkest in D) with those of I, it was seen that the pale 

 patches were of the same size as those of the larvae in w^hich 

 they were most developed of all exposed to black twigs 

 (viz. the lightest larvae in A). But although the patches 

 were of the same size, those of the former were yellowish- 

 brown and clouded, and those of the latter white. The 

 ground-colour of the larva in II was, however, much lighter, 

 being a brownish-black, than that of the ligljtest larva in 

 I. Hence the darkest larva in 11 was distinctly darker 



