22fi THE CANADIAN ENTOMOLOGIST. 



them in the field to see if any hatch this autumn. On one occasion when 

 I had eggs oithoc, several of them hatched in the autumn, and it was front 

 these that I got the insect through all its stages, the first time I bred ii." 



Again from his letter of Aug. 19th : 



" Your success in getting these eggs is certainly remarkable. . . . 



I think probably that these eggs will follow the same course as those of 



gorgon. I remember once having from Mr. \V. H. Edwards larva; to 



hibernate for him of C Snowi, which passed the winter as half-grown 



larvae It would be very interesting if you could find eggs of 



dorcas in the open, and then mark the plant and watch them to see what 

 they do under natural conditions." 



At the Bloomfield bog, on July 30th, there were a few worn males 

 Hying, and while females were more abundant, it was evident that dorcas 

 was near the end of its flight for the season. On this date ten females 

 were confined in the open. At my next visit, on August 22nd, a rough 

 count through the gauze bag gave me seventy-four eggs, which were left 

 for future developments. A search on the growing cinquefoil yielded 

 seventeen eggs, all of which except one (accidentally removed) were left 

 on the plants. These were marked with strings, or in the case of three 

 eggs on the same plant covered with gauze. On October 15th I visited 

 the locality again; the three eggs under the gauze were found on the dried 

 leaves where the latter had fallen, and were as bright as any eggs when 

 first laid. Two of the eggs on the plants marked with strings were also 

 found, while no eggs at all could be located on some of the others. As 

 the eggs are usually laid on the leaves, in the last case they had probably 

 fal'en with them to the ground. The bag in which the ten females had 

 been confined was still in place, but on November 15th I found that it 

 had been removed. It was lying, however, not far off, and contained only 

 forty-two eggs. At no time had I discovered any larva;, and none of the 

 eggs brought home had hatched. In a single instance I had found what 

 looked like the base of an egg attached to a dead leaf, as if the larva? had 

 eaten the rest of the egg, but there was not enough of the egg to make this 

 certain. From all the data at hand then, I concluded that dorcas passed 

 the winter in the egg state, and that if any eggs hatched in the summer or 

 fall it was a very small proportion, as yet undetermined. 



The female butterfly under natural conditions lays her eggs near the 

 top of the cinquefoil bush. Usually it is on the pinnate leaf, within four 

 inches of the tip of the branch. In forty-one examinations only four eggs 

 were lower than this, the lowest being eight inches. Most of the eggs in 



