108 



THE ENTOMOLOGIST. 



longer to be expected under normal conditions, were divided 

 into two lots in October. 



Lot A. — 150 pupae were kept in the incubator at a temperature 

 of about 27° C, which was, as far as possible, constant ; there 

 they frequently moved themselves vigorously, which they had 

 never previously done at the room temperature of 13° C. Such 

 movements were observed up to Jan. 14th, 1887, but not later. 

 Up to then no butterfly emerged, and the examination of the 

 pupse on March 2nd showed that they were all dead and putrid. 



Lot B. — 86 pupae were kept over water at the room tempera- 

 ture, which in November, December, and January was not above 

 13-14° C. There emerged, however : — 



1 male, Uvana, 



2 males, ,, 

 1 male, ,, 



1 female, ,, 



3 males, ,, 



2 males, 1 female, levana (1 crippled). 

 2 males, 1 female, ,, 

 1 female, ,, 



1 male, ,, 



2 females, ,, 

 2 females, ,, 

 1 male, ,, 



1 female, ,, 



2 males, ,, 



1 male, 1 female, ,, 



2 females, 1 male, ,, 



1 male, ,, 



2 males, ,, 

 1 male, ,, 

 1 male, „ 



OnFe 



jb. 



16th, 186 







lyth, ., 







23rd, „ 







23rd, „ 







24th, „ 







28th, „ 



On March 



6th, ,, 







7th, „ 







8th, „ 







9th, „ 







10th, „ 







12th, „ 







13th, „ 







15th, „ 







17th, „ 







20th, „ 







21st, „ 







22nd, „ 







25th, „ 



On"^ 



Lpril 



4th, „ 



34 levana, 22 males, 12 females. 



Fifth experiment with levana, 1886. — Young larvae of the 

 second brood, found in the open air on Aug. 16th, were reared 

 in the incubator at 30-31° C. ; from Aug. 29th the temperature 

 was kept at 27-28° C. Pupation took place from Aug. 24th 

 onwards. The pupae remained in the incubator, and there 

 emerged there, from Sept. 1st to 7th, 56 prorsa (some of them 

 with a good deal of yellow), but no actual porima. 



Sixth experiment ivith levana. — Half-grown larvae, found on 

 Aug. 16th, were treated in the same way, i.e. first kept in the 

 incubator at 30-31° C, and later on at 27-28° C. Pupation took 

 place between Aug. 20th and 27th, and there emerged, between 

 Aug. 30th and Sept. 4th, 14 prorsa (three of them with much 

 yellow), but no tv\ie porima. 



