248
H . KLOMP
TABLE XVIII
Number8 of Larvae and Pupae in an Experiment
Initial
Initial
Final number of pupae measured
number
number
Category
of jars
of larvae
males
females
totals
a. single
54
54
24
28
52
b. single
54
54
26
26
52
a. in couples
27
54
22
22
44
b. in couples
27
54
28
16
44
( c ) Results of the Experiment. The pupae obtained were measured and
grouped into classes of 0-1 mm. The results are given in Fig. 13 and the
means and standard deviations summarized in Table XIX. It is shown
that both in males and in females there are larvae with five and larvae
with six instars. In the single rearings the number of larval instars of
each individual pupa could be established. Where there were two larvae
per jar this was possible only when both larvae passed through the same
F;;mG:k i ; ~ F E M A L k
4.0 4.2 44 4.6 4.8
4.6 L8 5.0 5.2 5h 5.6 5.8
a.lN COUPLE
0
W
(z
3
In
L.6 4.6 5.0 5.2 5.4
5.6 5.8
PUPAL DIAMETER IN rnm
FIG. 13. Histograms of pupd diemeter of speckem reared in jars during lervel development. See the text.