20 THE CANADIAN ENTOMOLOGIST. 



there are slight black stipplings on other parts of the back. When pro- 

 vided with dried leaves, the larva? drew them together, forming a very 

 thin cocoon. 



Chrysalis. — Length 28 mil. ; length of wing cases, 16 mil. ; depth of 

 thorax, 8 mil. General shape as far as the ends of the wing cases, cylin- 

 drical, rounded anteriorly and somewhat constricted dorsally at the junc- 

 ture of the thorax and abdomen. Remainder of the pupa conical, the 

 extremity provided with eight hooks, the longest pair curving outwardly, 

 the next longest pair the same, while the two short pairs at the base curve 

 inwardly. On each of the two segments, posterior to the ends of the 

 wing cases, is a pair of ventral protuberances, which appear to be the 

 rudiments of the posterior pro-legs of the larva. The stigmata are plainly 

 indicated and the abdomen is provided with a few black hairs. Immedi- 

 ately after pupation the color is bright green, which, however, soon 

 changes to a purplish brown, dusted with a whitish bloom. Duration of 

 this period twenty-five days. 



It is probable that in their natural state the mature larvae and pupa? 

 attain somewhat larger proportions than those described above, as the 

 moths which were bred expanded only from 65 to 68 mil., while the 

 parent moth from which the eggs were obtained expanded 80 mil. On 

 the emergence of the larva? they were offered leaves of white birch, which, 

 however, they did not take to very readily. These were afterwards 

 changed for willow, at the suggestion of Prof. G. H. French, to whom the 

 writer is much indebted for his kindly interest and valuable instruction in 

 this department of entomological research. Upon this food-plant the 

 larva? appeared to thrive, and some ten examples of the imagines were 

 obtained. 



The Society's Collection of Insects sent to the Colonial and Indian 

 Exhibition in London, in 1886, came back in safety, with the exception of 

 two cases, which were somewhat damaged. We are anxious to replace 

 the following species, specimens of which will be thankfully acknowledged, 

 if sent to Mr. E. Baynes Reed, London, Ont. : — Pamassius smintheus, 

 var. Hermodur ; Pier is protodice, oleracea, vernalis,virginiensis,frigida 

 rapce ; Colias ccesonia, eurytheme, philodice ; Terias lisa, nicippe ; Erebu 

 odora ; Zale horrida ; Homoptera edusa, Saimdersii, lunata, calycan 

 thata, albofasciata, luuifera, benesignata, duplicata; Ypsia undularis. 



