26 THE CANADIAN ENTOMOLOGIST. 



brought away females of Alopc, from which he obtained eggs for me. I 

 got Atope eggs here at Coalburgh from three females. A friend at Hunter 

 sent eggs of Nephele, and Mr. Worthington sent many of the Illinois form 

 from Chicago. In each case the parent was sent with the eggs that the 

 type might be noted. From Albany, Hoboken is 150 miles south ; Coal- 

 burgh 800 miles southwest ; Hunter is 35 miles southwest of Albany and 

 of about 2,000 feet greater elevation. Chicago is about 800 miles north- 

 west of Coalburgh and 1,000 west of Albany. So that the five localities 

 are separated by considerable distances, and there has probably been no 

 intercommunication at any time so far as these insects are concerned. 



The eggs of the six lots were kept apart and as the larvae hatched (at 

 from 14 to 28 days from deposition, depending on the temperature), they 

 were placed on sods in separate pots and left in the coolest room in my 

 house. But some of the Illinois eggs were sent to Mr. C. P. Whitney, at 

 Milford, N. H., who offered to put them on ice. I wished to try the 

 effect of cold in retarding the hatching. Early in February I received 

 the boxes again and found a number of healthy larvae, with a few unbroken 

 eggs. These last proved to be dead. The eggs had been sent in a paper 

 pill box which was within a flat tin box, and this was set directly on the 

 ice. The young larvae when I received them were fixed to the rough 

 sides of their box and had not been attacked by mould, the enemy most 

 to be dreaded. Mr. Whitney wrote that he was notified in December that 

 the ice-house was empty, and he thereupon removed the tin box without 

 opening it, and placed it in a snow bank, where it remained till I sent for 

 it. The larvae may have been emerging from the eggs when he first 

 received them, or perhaps did so in the interval between ice-house and 

 snow. This method of keeping larvae which become lethargic immedi- 

 ately upon leaving the egg will probably be found successful with all species 

 of butterflies which have that habit — as the large Argynnids — and make 

 it possible to breed them in numbers. I have been unable to find any 

 other mode of wintering such larvae without a certain loss of most of 

 them. 



On 23rd Jan., 1879, I transferred such of the Satyrid larvae as were 

 living (and this included some of each lot) to fresh sods, and 28th Jan. 

 noticed that several were feeding. One Hunter Nephele passed 1st moult 

 23rd Feb'y, and before 4th March several of the same lot had passed the 

 moult. But the Illinois Nephele and all A/ope lingered. One Coalburgh 

 Alope and one from Hoboken passed 1st moult 7th March, by which date 



