12 
larve kept in soil supplied regularly with a certain amount 
of moisture. Jn all these the number of moults was not 
more than eight. In the second table the records are of 
larvee which were not supplied with moisture at all or 
were supplied with it only after the eighth moult. The 
larval stage in these was enormously lengthened and the 
number of moults increased from eight to thirteen. The 
differences in the length of larval life are brought about 
in the following table :-— 
; First series Second series 
2 months and 11 days 9 months and 9 days 
2 °) BI: ase ome. 4 
3 bs A <3 9] 7 AB ie 
3 - Din eee OMT 26° <3 
4 1S rs, 1) st open: 
4 * LANs be A282 Ors. id eee 
Ok) hokeenes ASR, 
In some dishes to which moisture was not added at 
all, the larvee moulted as many as sixteen times. On the 
other hand others precisely similarly situated pupated in 
the eleventh instar. Of the four that were supplied with 
moisture inthe fourteenth instar one died, the second pu- 
pated six days, the third a fortnight, the fourth a month 
after water was added but all the three before another 
moult. 
The variations in the size of the larve are equally 
puzzling. ‘The following are the measurements of larve 
erown in soil supplied with different degrees of mois- 
CHEE 


—— = — — — 
* Number of larvae supplied daily with 









Date 2 iS S iS 5 BS 
bec es “3 é ie 2 
Oo] 8 Do. | > eel et 
Sih. Pee S) > S) 5 
ay | xq a) 4 al < 
14th April 1910, 15 2mm. 15 2mm. 15 2mm 
2nd May do il 45 11 5 13 7 
7th May do 5 52 11 51 12 73 
14th May do ee nse 4 } 6:3 ll 58 11 9 
22nd May do fr Fontes eed peo 10 ; 6:0 11 9 
28th May do ot st 4 | 85 a Gey pon ee © ze) 
13th June do 4 |10°2 9 80 ep uso) 
24th May do | 4 |13°0 lors tf 120 




The table does not disclose the range of individual 
variation which is enormous. lLarve hatched on the 
