Some aspects of hibebnation. 173 



fresh adjustments become necessary. The physiological division of 

 labour l3etween different cells that begins to occur with the first 

 association of morphological units into a compound individual, takes 

 charge of the hybernating as of other functions. A give-and-take 

 arrangement is set up between different tissues, with a special view to 

 hibernation, the whole being bound together and placed in relation 

 with the outer world by means of the universally coordinating 

 mechanism of the nervous system. The problem to be solved in the 

 case of one of the higher vertebrates is no doubt far from being a 

 simple one ; natural selection however proves itself equal to the 

 task, and provides, as Ave have seen, a successful balancing of all the 

 bodily functions in the nice relations required by a complex animal 

 during its period of winter inactivity. The acme of complication is 

 reached in the case of the hibernating mammal, in Avhich the requi- 

 site adjustments reach an extreme degree of delicacy, all brought 

 about with the utmost precision under the influence of natural selec- 

 tion, °'''' But the hibernation of the insect, though so far removed in 

 degree from that of the mammal, is but another term in the same 

 physiological series ; and, pace Mr. Kane, few physiologists will 

 doubt that both alike are foreshadowed in the resting periods of 

 the protozoa. 



The Introduction of Callimorpha hera into Britain. 



By W. A. LUFF. 

 I was much interested in Mr. Tutt's able article on GaUimorpha 

 hera, in the December 1st number of the Entomologisfs Record. I have 

 seen this lovely moth on the wing every year in Guernsey or Sark 

 for the last thirty years, and when I was actually engaged in forming 

 my collection of Guernsey lepidoptera I have captured many 

 dozens of them. They are, or rather were, much commoner in Sark 

 than in Guernsey ; but now that this lovely little island is overrun 

 with English tourists in the summer season, they stand a fair chance 

 of being exterminated. It was no uncommon sight to see two or 

 three together on the flower-heads of Eupatorium ccumahinum in 

 company with Vanessa to, or the beautiful green rose-chafer [Cetonia 

 aurata) all busily engaged in sucking nectar from the flowers. They, 

 however, seem to have a preference for the coast, and I got most of 

 my specimens from the ivy, which here and there hangs in thick masses 

 over the rocky clift's. By pelting pebbles into this ivy I was sure to 

 disturb many of them ; they would soon settle again on the side of 

 the clifi", and be marked down and easily captured. I only wonder 

 that it has not become common in England before. I have at various 

 times sent numbers of the eggs and larvae to various correspondents, 

 and I read in a Guernsey (ricide Dooh, piiblished in 1863, that Dr. 

 Lukis, an enthusiastic Guernsey naturalist, sent a large supply of 

 eggs and larvfe to a well-known author on British Lepidoptera, who, 

 he states, set a number at liberty, with the result "that they spread 

 in all directions, so as to claim a place in the British list." 



* It is remarkcable that the " homothermic ''mammal, when hibernating, may 

 lose its characteristic power of heat-regulation, and may resume the '• poiki- 

 lothermic " condition of the lower vertebrate or new-born infant. See Pembrey 

 and Hale White; " Proceedings of Physiol. Soc," p. xxxv., Journal of Flnjsiology, 

 1895. 



