TIIK (JYl'SY MOTH --APPENDIX. 69 



oilier cages escaped in sonic unknown \v:iy, and, :is the 

 chance of finding the eggs in such cages \v:is very small, 

 further attempts along ihis line were abandoned. 



For the oilier line of invest igat ion, common jelly tum- 

 blers, containing aboul two inches of earth, were used, tin- 

 tops ot the jar- I >eing covered with pieces of mndin which 

 were held in place by rubber bands. A pair of beetles 

 were placed in each jar. with gypsy moth larvae for food 

 and with fresh leaves to serve as food for the larva?. At 

 lir>l the jars were kept in the insectary, but when the 

 weather became excessively hot it was thought best to 

 place them out of doors, and a large box with a screen cover 

 was selected for the purpose. The jars were examined 

 daily, and when eggs were found in the earth the beetles 

 were changed to other jars, those formerly occupied not 

 being disturbed until the eggs hatched, when the earth was 

 examined and the number of young larvae carefully noted. 

 Great care had to be exercised in not allowing the grubs 

 to remain together too long, as under these conditions they 

 soon develop cannibal tendencies, and readily devour each 

 other. 



During the extremely warm weather, about the middle 

 of July, many of the grubs which had heretofore seemed 

 healthy began rapidly to sicken and die. Thinking that 

 perhaps more natural conditions could be obtained, I 

 made a cage consisting of a box twenty-four inches long 

 and tive inches square, the lower end being covered with a 

 wire screen. The box was sunk in the ground and nearly 

 covered with soil, the top being covered with muslin held 

 in place by an elastic band. Although great care was 

 taken to feed and watch the grubs, at the end of eight day- 

 all had died. Later more young grubs were placed in the 

 cages, but the results were very unsatisfactory. On ac- 

 count of these di-couraging results, careful attention was 

 given to the insect- confined in the jars. Later in the sea- 

 son a number of eni:- of C. /'/-A//'/"/// and C. calidinn were 



, , ' .' 



thus obtained, and, upon hatching, the young larv;e were 

 isolated. A part ol'the.-e larva- remained healthy, and with 

 oreat care I was able to rear a few through their successive 



o 



stages. 



