THE CANADIAN ENTOMOLOGIST. 409 



whicli no polios were found this year (1907), though Mr. Watson had taken 

 one or two the preceding spring. Not an egg was discovered,* and it 

 would seem that — unless we overlooked a plant not at all difficult to find 

 — the species has a second food-plant at present unknown. 



Mr. Watson took a few of the ova, and succeeded in bringing one of 

 the larvae through all its changes. I brought the rest to Albany, and they 

 all hatched between May 23rd and 28th. On the 24th sixteen eggs which 

 had been collected at Lakehurst by Mr. William P. Comstock, were sent 

 to me by Mr. Watson. In spite of the difficulty of obtaining fresh food 

 (the nearest locality for bearberry known to me is some sixteen miles from 

 here), and the consequent mortality among the caterpillars, a few lived to 

 pupate, and the life-history is practically complete. 



Not altogether satisfied with a laboratory knowledge of the larvse, a 

 third trip to New Jersey was made for the purpose of studying them in 

 the field. June 2gth found us at Lakewood once more, but a driving rain 

 effectually prevented our doing anything during the morning. This had 

 simmered down to a mere drizzle by lunch time, so, donning raincoats, we 

 started to walk to Lakehurst. Comprehending our plan, the wily storm 

 swung around and came tearing back with greater fury than before. As 

 there was no shelter to be had along the railroad track, we were 

 thoroughly drenched before reaching our destination. Purchasing some 

 dry underclothing, we sought the bearberry locality, and after an hour's 

 search discovered a full-grown caterpillar. 



The next day was spent in the same region, and between showers we 

 collected three more larvae, all of which had passed the final moult. All 

 of the four taken in the field appeared to be healthy, and pupated within 

 a few days. If any were parasitized it will not be evident until next 

 spring. 



The above account is given principally to indicate the rather limited 

 opportunities which the author has had for studying this species. The 

 generalizations concerning feeding habits of the larvie, etc., which will 

 appear in a succeeding paper, are based upon the meagre data obtained 

 during these three visits to New Jersey, and are subject to correction in 

 the light of broader experience. The life-history o{ polios will be given in 

 detail as soon as possible. 



*Egfg:s were subsequently found in this patch by Mr. William P. Comstock, 

 of New York City, the larvsc from which were bred to maturity by him. 



