160 THE CANADIAN ENTOMOLOGIST. 



geometricians. I will only add that if the larva ceased to spin when the 

 reticulated frame work is finished, the cocoon would belong to the same 

 class with those of Plutella cruciferarum and a few others which pupate 

 simply in an open network. 



Fig. I is very imperfect. It should represent the transverse lines not 

 only as oblique, but as sagging down more than they do, and should show- 

 more clearly that each, on reaching a rib, passes along it, over the space 

 between these lines, and is bent back over the space between two. It is 

 proper, perhaps, to state that the threads harden so quickly, or lose their 

 viscidity so quickly, that two threads in contact seldom adhere except 

 immediately at the point of the spinneret. 



I will add that so far as I have examined bred specimens of the imago, 

 those from Ambrosia have the markings more sharply defined and the 

 brown scales darker tlian those from Helianthus. 



GoNiLOBA (Eiidamus) Tityrus, Fab. — I have within the last few 

 days of the end of August made a capture of numerous specimens of the 

 larvae of two skippers — hitherto, it has been considered, rather rare in this 

 locality, only an occasional specimen of either larva or butterfly being seen. 



On a few locust trees and young second-growth of Robinia pseudada, 

 adjoining my office, I took in about an hour some eighty specimens, and 

 I am satisfied a very little exertion would have procured another hundred ; 

 on a subsequent search I also found them in another locality some dis- 

 tance off. The larvse were nearly all three parts grown, and some just 

 beginning to enter the pupal stage ; in only one or two instances did I 

 discover very young specimens. It is worthy of note that I only saw 

 three specimens of the butterfly this summer, so that it could not have 

 been very common. Dr. Harris says " that the viscid locust tree is some- 

 times almost completely stripped of its leaves by these insects, or presents 

 only here and there the brown and withered remains of foliage which has 

 served as a temporary shelter to the caterpillars." I could not see, how- 

 ever, that the larvae had done any appreciable harm to the trees on which 

 I found them, although their numbers would have led me to look for very 

 material injury. I would state also that in some seven or eight instances 

 in examining the empty leafy cases formed by the larvse, I found single 

 specimens of Clyius pictus, who seemed to enjoy the cool retreat thus 

 provided for them from the heat of the sun. 



E. Baynes Reed, London, Ont 



