LARViE OF LASIOCAMPA QUERCUS. 143 



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

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



P. Pairing between mothit from larvae of brown-haired variety. — These all 

 unfortunately died before reaching adult plumage. 



M. Pairing between moths from larvae of the tico varieties, viz., s broicn- 

 haircd (7)+ x ? white-haired (G). — All the larvns, 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 pui'e white, being faintly tinged with 

 a dusky hue. 



C. Pairing Iietween a i fiom irliite-haired larva x ? -L. var. vitiunii. — This 

 cross produced larvai with i-ed-brown urticating fur. 



B. Pairing between i from larva of browu-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. 



II. LaRV.E of (1) L. VAR. SICULA X L. VAR. MERIDIONALIS ; (2) 



L. VAR. SICULA X L. (var. viBURNi X VAR. MERiDioNALis) . — The larvae of 

 the crosses obtained between L. var. sinda and the French forms 

 worked out as follows : — 



U. Pairing between s L. var. sicida and ? L. var. meridionalis. — All the 

 larvae were of the L. var. sicula or L. var. t'ibiirni form, i.e., with red-brown urti- 

 cating fur. 



V. Pairing between g L. var. sicula and ? L. (viburni x meridionalis, from 

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

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



No. 1 ('98) + . Pairing between s L brood {2nd gen. L. viburni x meridionalis, 

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

 viliurni or /.. var. sicula form, except that the fur was, judging from memory, 

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



III. LARViE OF English races crossed with French races. — 

 These worked out at much greater length as folloAvs : — 



J. Pairing between d L. querciis [English) and ? L. var. meridionalis 

 (Cannes). — In the early instars the larvre followed the cf 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 sub-dorsal band, how- 

 ever, was more strongly marked than was usual with the Cannes larvse at this 

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

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

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

 with orange-red. 



2-8. Pairing between J L. var. meridionalis (Cannes) and ? L. var. callunae 

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

 callunae, but at 3rd and 4th instars the influence of i parent became predominant, 

 and when in penultimate skin both urticating fur, as well as the longer hairs, were 

 pure white. In their last skins, however, the L. 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 remained pure white. 

 The heads of these larvre when full-grown were of various shades, from a bright 

 brick-red, slightly mottled with deep indigo, to a form in which the indigo formed 

 the ground colour, and only a slight mottling of the red was present. The face 

 marking agreed with that of the French race. 



3-5. Pairing betu-een ^ L. var. viburni and ? L. querciis (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. 



3'8. Pairing between s L.var. viburni and ? L. var. callunae. — The young larvae 

 closely resembled those of L. var. callunae in their early instars ; in the penultimate 

 skin they were much nearer to L. var. viburni, differing only in a few points. Thus 

 the long dorsal hairs were either fewer in number or less brilliantly white than in L. 



* These letters refer to the broods noted already (antea p. 115), and are marked 

 here with the same letters. 



f For these broods, see anted p. 114. 



J For origin of this brood, see anted p. 115. 



