240 THE CANADIAN ENtOMOLOGlST. 



pass it in to the next generation of lepidopterists. Tiie so-called Bairdii 

 are also not true Bairdii, but at present it is impossible to fix upon their 

 type, because no two of them have been found alike. I may yet figure 

 these butterflies, but it would take half-a-dozen plates to do them justice. 

 The larvse from eggs of the Bairdii, as well as those from eggs of the 

 so-called Oregotiia, were of the Asterias pattern ; in the first three stages, 

 black, or brown-black, with white saddle-patch on 7, 8, 9, and dots and 

 small spots of white irregularly placed on dorsum or upper part of side, 

 no two individuals being quite alike in this respect. After third moult, 

 green, with a black band across the middle of each segment, in which are 

 set rounded yellow or orange spots ; the junctions of the segments also 

 black. The green of Oregonia after fourth moult was bright yellow-green, 

 the black bands narrow, the spots a rich chrome. Of Bairdii, a much 

 darker green, the black bands wider, the spots pale yellow. Yet, on 

 looking over a large number of the larvse of each form, some of the Bairdii 

 were as brilliant as the others, and in all points were like them. This 

 might be. expected of hybrid larvas. As to the pup*, I could see no 

 difference in shape, and all were in general as in the Asierias group. 



Eggs of so-called Oregonia laid 5th July, hatched 10th. The first 

 moult was passed 14th and 15th; the second, 19th and 20th; the first to 

 pass third was on 23rd ; to pass fourth, 30th July; the first pupa, 9th of 

 August ; the first imago, 22nd August. 



Length of the egg stage, 5 days. 



Length of first larval stage, 4 days. 



Length of second larval stage, 5 days. 



Length of third larval stage, 4 days. 



Length of fourth larval stage, 7 days. 



Length of pupa stage, it, days. 



From laying of egg to imago, 38 days. 

 Eggs of ^^/r///V laid 8th July, hatched 12th. The first moult was 

 passed 17th ; the second, 23rd; the third, 27th; the fourth, August 2nd ; 

 pupation, 12th August. The first imago, 31st August. 



Length of egg stage, 4 days. 



Length of first larval stage, 5 days. 



Length of second larval stage, 6 days. 

 Length of third larval stage, 4 days. 

 Length of fourth larval stage, 6 days. 

 Length of pupa stage, 19 days. 

 From laying of egg to imago, 44 days. 



