THE CANADIAN ENTOMOLOGIST. "2*31 



sides. Usually these last have a confluent, instead of macular, yellow band, 

 along the side, and the spines are always light, whitish, or yellow-white, 

 with or without red at base. So the head is brown instead of black in 

 these green examples, and many of the spines on head are white. 



But English authors describe the larva of Atalanta as considerably 

 unlike the foregoing. 



Mr. Stainton, Manual Brit. But., 1857, gives it as "yellowish-gray, with 

 a pale yellow lateral line," and says nothing of any other color. 



Westwood & Humphreys, in Brit. But., p. 55, say : "The caterpillar 

 is of a dusky green color with a yellowish dorsal line and also a pale line 

 on each side above the feet." 



Mr. Edwin Birchall, in Ent. Mo. Mag., vol. 13, p. 210, 1877, writing 

 from the Isle of Man, says that the butterfly is very common there and 

 almost everywhere in the British Islands, and that in the Isle of Man the 

 larvse had swarmed in every lane, in 1876 ; and goes on to say : " The 

 larva varies in color remarkably, but may generally (perhaps always) be 

 classed under one or other of the following descriptions, and yet the color 

 of some of them is so far intermediate that the variation can scarcely be 

 called simply dimorphic. 



" I. Ground color gray-green, varying to dingy white, the lateral stripe 

 not very distinctly marked. This is, I think, the typical form, and the only 

 one that I have seen in England. 



" 2. Ground color intensely black, the lateral stripe white or yellow." 



Now it is a noticeable fact that my larvae at Coalburgh were nearly all 

 black in last stage, the lateral stripe usually macular, and greenish-yellow, 

 A few examples were yellow-green instead of Mack, about 5 per cent, of 

 the whole, and in these the lateral stripe was more continuous than in the 

 black ones, and about 5 per cent, were mottled black and yellow. Here 

 were three distinct types of larva. I have noticed the same thing in larvse 

 of previous years here, but how it is in other parts of the United States 

 I do not personally know. Dr. Harris says : "The full grown ones are 

 generally of a brown color more or less dotted with white." Mr. Birchall 

 says the British type is gray-green varying to dingy white. This last color 

 I have never met with, and the other authors quoted lead me to believe 

 that the usual color is gray-green, or yellow-gray, or dusky green, but not 

 black. Whereas so far as I know, the American type is black, and the 

 gray-green or yellow are the exceptions. 



Mr. Newman also says that the females of Atalanta have a small round 



