260 STATES OF INSECTS. (Pupa.) 
and on the anterior part of that of Platypterix cultaria 
and sicula ; in which last, Kliemann observed it to be 
renewed when rubbed off*. Many pupz have the 
sheaths of the wings of a different colour from that of the 
rest of the body ; a few are variegated with paler streaks 
or bands, as Clostera Anastomosis, which has two red 
longitudinal stripes down its dark-brown back; and that 
of the common gooseberry and currant moth, which may 
be found in every garden, has alternate rings of black 
and yellow®. 
A few pupe vary in their colour, as the painted-lady- 
butterfly (Cinthia Cardut), some of which are light-brown 
with gray streaks and golden dots, others wholly of a 
golden yellow or brown, others of a light green‘. 
Almost all at their first assumption of the pupa state 
have a dieffrent colour from that which they take a few 
days afterwards. This last they retain until the disclo- 
sure of the perfect insect; except some that have trans- 
parent skins, which a few days previously to this period 
exhibit the colours of the included animal. 
iv. There is as great variety in the length of the age 
of Insects in their pupa as in their larva state. Some 
species continue in it only ¢wo or three days (Aleyrodes 
Chelidonit) ; others, as many weeks, or months, or even 
years. Each, however, has in general a stated period, 
which in ordinary circumstances it neither much exceeds 
nor falls short of. The only general rule that can be 
laid down is—that small pupze continue in that state a 
shorter time than those of larger bulk. Thus, amongst 
-coleopterous genera, the more minute species of weevils ; 
9 Beitrage, 181. ° Sepp. pti é iif. 4. ° Rosel. I.i. 61. ii. 5. 
