1 895-] ENTOMOLOGICAL NEWS. 149 



only thirty-two cocoons, having^ from accident lost the most of 

 my young larvae of the last mentioned hybrid. 



June II, 1894, I found another cocoon made by an escaped 

 larva out of one of the barrels, and very forcibly illustrating 

 protective mimicry. I espied on the pine-floor of my plant- room, 

 close by a bundle of printed American flags, tacked onto 

 plain white pine sticks which had been undisturbed since New 

 York's Columbus Celebration more than a year ago, a small 

 female hybrid of ceanothi et cecropia. I failed to account for its 

 presence there, having in January previous removed all of the 

 hybrid cocoon to my ofiice below. I examined the bundle of 

 flags, untying the sticks, and there found between two of the 

 pine-wood sticks a cocoon attached to the wood of both, and in 

 color not distinguishable from the wood. I cut off" that portion 

 of those two sticks, leaving the cocoons in situ, which I sent to 

 the editor of Entomological News for preservation and future 

 use, the same as I had previously done with other cocoons illus- 

 trating Cocoofi Mimicry. By thus clinching the nail of necessary 

 evidence, we escape the carpings of cynics, who like to argue 

 from a more hypothetical point of view. Regarding color, I 

 would say, that this last discovery, illustrative of cocoon mimicry, 

 resembles cream-color more than any other, and compares favor- 

 bly with cocoons of my hybrids found attached to the cheese- 

 cloth cover of barrels. 



I am sorry now that I did not preserve all of my Hght-colored 

 cocoon or pupae-cases found, and illustrating so forcibly the claim 

 advanced in this paper. Many of those cocoons spun up to the 

 cheese-cloth and barrelstaves, I sent out to my numerous foreign 

 and native exchanges, along with darker ones found on stems of 

 Prunes serotina. Dark cocoons were never found attached to 

 side of barrel, and such of the dark ones, which spun up in the 

 cellar before larvae could be removed, were of the same shade as 

 those found on food-plant in the barrels of upper part of house. 



In further evidence of Cocoon- Mimicry , I must report another 

 find of an albiyio cocoon of' Cerura multiscripta, which I reared 

 from a collected larvae the first week of July, and from which 

 emerged a perfect imago during the last week of same month in 

 1894. This cocoon was spun up between inch-strips of white 

 blotting-paper and the sides of a glass-jar used for breeding cage 

 of Cerura. The strips of paper were placed between cover and 



