38 BRITISH LEPIDOPTERA. 



meridionalis X viburni, but this does not alter the general result, 

 viz., that the larvae derived from four full batches of eggs, with $ 

 meridionalis X 2 viburni parentage, divided, as just noted, into two 

 approximately equal portions, one with red-brown, the other with white, 

 urticating fur, with no intermediates. The larvae of the second 

 generation, i.e., larvae obtained from eggs laid by imagines pro- 

 duced from this cross, resulted as follows : 



Pairing between moths from larvae of white-haired variety. — Four larvae 

 lived to adult age, all of which were white-haired. 



Pairing between moths from larvae of brown-haired variety. — These all un- 

 fortunately died before reaching adult plumage. 



Pairing between moths from larvae of the two varieties, viz., $ brown- 

 haired X ? white-haired. — All the larvae, when half-grown, tended to follow 

 the larval form of ? and be white-haired ; only two became adult, and these 

 had the urticating fur almost white, yet not pure white, being faintly tinged with 

 a dusky hue. 



Pairing bet-ween a £ from white-haired larva x ? L. var. viburni. — This 

 cross produced larvae with red-brown urticating fur. 



Pairing between a $ from larva of brown-haired variety and a ? L. var. 

 meridionalis. — This brood split up into two moieties, one half with white and the 

 other with brown urticating fur; six became adult, of which three had white and 

 three brown fur. 



Equally interesting are the results obtained by crossing var. 

 sicula with the French races. Of these Bacot notes: 



Pairing between $ L. var. sicula and ? L. var. meridionalis. — All the 

 larvae were of the L. var. sicula or L. var. viburni form, i.e., with red-brown ur- 

 ticating fur. 



Pairing between $ L. var. sicula and ? L. f meridionalis X viburni, from 

 brown-haired larva).— AM the larvae of this brood were of the L. var. viburni or 

 L. var. sicula form, i.e., with red-brown urticating fur. 



Pairing between $ L brood (2nd gen. L. meridionalis X viburni. from 

 white-haired larva) and ? L. var. sicula. — The larvae were of the L. var. viburni 

 or L. var. sicula form, except that the fur was, judging from memory, slightly 

 paler than that usual for the larvae of these in their normal forms. 



To the British lepidopterist the results obtained by crossing 

 the English races — quercus from Dorsetshire, and callunae from 

 Aberdeen — with the French races will probably prove still more 

 interesting. Of these Bacot notes: 



Pairing between $ L. quercus [English) and ? L. var. meridionalis 

 [Cannes). — In the early instars the larvae followed the $ stock, but at the 4th 

 instar the majority closely approached the French form as regards the colour of 

 the urticating fur, although in a few it was slightly dusky. The subdorsal band, 

 however, was more strongly marked than was usual with the Cannes larvae at this 

 stage. When full-grown they followed the English stock in having dusky while 

 urticating fur, but their heads, as was also the case in the 4th instar, show 

 strongly the influence of the French race, being shaded, in some larvae strongly, 

 with orange-red. 



Pairing between s L. var. meridionalis (Cannes) and ? L. var. callunae 

 (Aberdeen) . — When young, the larvae chiefly resembled young larvae of L. var. 

 callunae. but at the 3rd and 4th instars the influence of the 3 parent became predomin- 

 ant, and when in penultimate skin the urticating fur. as well as the longer 

 hairs, was pure white. In their last skins, however, the /,. var. callunae strain 

 again became apparent, the urticating fur being of a pale pinkish-brown, while 

 the lateral hairs were pale reddish-brown, and a few of the long dorsal hairs re- 

 mained pure white. The heads o( these larvae when full-grown were of various 

 shades, from a blight brick-red, slightly mottled with deep indigo, to a form in 

 which indigo was the ground colour, and only a slight mottling of the red 

 was present. The face marking agreed with that of the French race. 



/'airing between J L. var. viburni and $ /.. <]ucrcus (English). — Only one 

 larva of this pairing lived to assume its final skin. It then had pale brown urti- 

 cating fur, evidently a blending of the parental characters. 



