178 THE CANADIAN ENTOMOLOGIST. 



(2) On the larval growth of Cory da lis and Chauliodes. 



(3) On the means by which Silk-worms issue from their cocoons. 



Hornia was parasitic on the common humble-bee, and had been suc- 

 cessfully identified by careful study, although in several important points 

 it differed from the Meloidce to which it belonged. 



The further larval history of Corydalis comutus was given by Mr. Riley, 

 and was most interesting, especially to those members who had listened 

 to Mr. Riley's first descriptions of this curious insect at the Detroit meet- 

 ing. Mr. Riley had been very successful in elaborating the various points 

 of difference between Corydalis and Chauliodes. 



In discussion it was stated that the somewhat peculiar name of the 

 •' Hellgrammite Fly" for the Corydalis had been for many years in com- 

 mon use both on the Upper and Lower Mississippi ; and that the equally 

 curious name of " Dobson " was given to its larva, which was largely used 

 for bait by the river fishermen. 



On the paper relating to Silk-worms reference was made to Dr. Pack- 

 ard's recent theory on certain spines on the wings of Bombycidae, which 

 he stated were of service in assisting the exit of the insect from the cocoon. 



Mr. Riley, in combatting this idea, showed how in almost every case 

 the silk was spun in ^figures of 8, which would easily yield to pressure, 

 especially as in most cases a fluid (wrongly termed bombyc acid) was 

 emitted, and the silk thus rendered more pliable. His idea was that the 

 peculiar make up of the cocoon rendered it more yielding for the exit, and 

 that though the insect usually emerged at the end of the cocoon, there 

 seemed to be no reason why, if it chose, it could not find an egress equally 

 well at the side of the cocoon. 



Several minor matters were discussed, and the Club adjourned at the 

 call of the chairman. 



(To be Concluded in October No.) 



BOOK NOTICES. 



Entomological Contributions, No. iv., by J. A. Lintner._ 



We tender our sincere thanks to the author for an early copy of this 

 fourth part of his admirable work, which appears in form similar to the 

 previous issues, and occupies 144 pages. 



