34 
Psyche 
Table i 
[March-June 
1 
2 
3 4 
set I FG 
20.6 
14.0 
SG 
63-3 
37-5 
46.1 29.6 
set II FG 
22.7 
12.0 
SG 
26.5 
54-0 
55.0 17.0 
Mean length of time 
in days 
separating two consecutive molts. The 
numerals designate each intermolt and its order in relation to the 
final one, i being the last. 
Increase in leg-length 
The mean length of the first leg as measured on the last molt was : 
set I set II 
FG 
1 1 .0 mm 
10.5 mm 
SG 
14.3 mm 
12.3 mm 
SG males, which were also heavier, had significantly longer first legs 
than FG males after the last molt (set I: T — io, P = o.oi ; 
set II : T = 7.5, P = 0.05 ) . 
The rate of leg growtdi is given by the ratio of the length gain in 
the number of days necessary to obtain this increase of length. The 
mean rate of leg growth during the entire observation was: 
set I set II 
FG 
0.183 rnm/d 
0.176 mm/d 
SG 
0.069 rnm/d 
0.069 mm/d 
The rate of length increase was significantly higher for the FG 
males than for the SG males (set I: T — 10, P = 0.01; set II: 
T = 7, P = 0.05). This points out the relationship existing be- 
tween rate of maturation and rate of lengthening. No correlation 
was found between the leg-growth between molts and the length of 
time of the intermolt. 
Maximum weight 
Body weight increased for all males to a maximum at the last 
molt, declining from this point onwards. This is in contrast to 
