'I'l THE CANADIAN KNTOMOLUGIST. 



the butterflies loose here as they emerged. The first one was female, out 

 6th May, when the lilacs were in blossom, and I placed it un the flowers. 

 Others emerged day by day. On 9th, I recorded that i had turned out 

 40 to 50, but they soon disappeared and were not again seen. I saw 

 one soon after I had placed it on the lilac, pursued by an Ajax as if it 

 was regarded as an intruder. In all upwards of 100 were freed. About 

 a week after the last butterfly had emerged, I caught a male near the 

 house on a clover head, and this was the only Machaon I saw during the 

 summer. I had planted a large quantity of Fennel, thinking the females 

 might deposit eggs thereon, but diligent search failed to discover any. 



3. Effect of Cold Applied to Larvae. 



I. Diana. In 1873-4, 1 succeeded in rearing one of these larvae from 

 the egg to imago, starting with several hundred eggs ; there were losses at 

 every stage. The duration of each stage was also very great, of 2nd 

 stage 16 days ; of 3rd, 14 ; of 4th, 17 ; of 5th, 12 to 5th moult ; from 

 5th moult to pupation 22 days; of the chrysalis 21; the butterfly 

 emerging gth June. 



In Sept., 1880, I obtained about 100 eggs, and as soon as the larvae 

 hatched, I sent most of them to Prof Fernald, at Orono, Me., to go in an 

 ice house. A few I kept myself and tried to carry them through the 

 winter in a cold room, but by nth Feb'y, 1S81, all had died. Most of 

 those sent to Orono also died from the ice giving out late in the fall appar- 

 ently, but in one little paper box were a few larvae (10 or 12) still alive 

 when I received it, 7 th March. From these I raised 4 butterflies, and 

 could have several more, had I not put one at each larval stage, and one 

 chrysalis, in alcohol. The stages were in duration as follows, beginning at 

 ist moult, or the next one after hibernation : 



No. I. 2nd stage, 10 days. No. 2. 2nd stage, 13 days. 



3rd " 9 " 3rd "■ 9 " 



4th " 7 " 4th •' 5 to 6 " 



5th " 6 " Stli " 5 " 



5th moult to pupation 13 days. 5th moult to pupation 13 days. 

 In chrysalis 19 days ( ^ ). In chrysalis 19 days ( ^ ). 



No. 3. 2nd stage, 13 days. No. 4. 2nd stage, 14 days. 



3rd '• 9 " 3rd " 9 " 



4th " 5 to 6 " 4th " 5 " 



5th " 5 " 5th " 6 to 7 " 



