26 
OBSERVATIONS UPON 
low color and is covered with stout branched 
spines that are black at their tips. One of these 
larvae is shown enlarged at Fig. 
ii c, and at Fig. 12 is repre¬ 
sented one of the spines much 
magnified. The larva when 
fully grown fastens the pos¬ 
terior end of its body to the 
under side of a leaf and then 
in a few days sheds its outer 
skin containingthe spines and 
changes to the pupa state (Fig. 
11, b). From these pupae the 
beetles appear a few days later. 
They live over winter and ap¬ 
pear about as scon as the beans 
are up in the garden or field 
and begin to feed upon the 
leaves, on the under side of 
which they deposit their yel¬ 
lowish brown eggs in large 
clusters, after the manner of 
the '‘Colorado Potato Beetle.” 
The spiny little larvae that 
hatch from these eggs remain 
on the under side of the leaves 
which they skeletonize in feed¬ 
ing. The beetles eat through 
the veins of the leaves and do 
not skeletonize them. They 
also eat into and destroy the 
Fig. 11— Tho Western Bean- . . , 
beetle, Epilachna corrupia green pods as shown at fig. 
Muls. A, mature beetle; 
B, pupa; C, larva; D. bean 
pod, showing injuries 
(original). 
11 d. 
There is only one brood of 
this insect in a season. 
