EGGPLANT TORTOISE BEETLE. 33 
antenne, legs, and wings of the adult are evident on the ventral 
surface, held against the body. Portions of the larval molts adhere 
to the blunt tip of the abdomen, by which the pupa is attached to the 
surface upon which it rests. 
Measurements of five individuals gave an average length of 5.4 
mm., the length varying from 5 to 5.5 mm. The average width of 
the ete shield was 2.9 mm. 
_ THE ADULT. 
The following description of the adult (fig. 2.) is taken from 
Blatchley (6): 
Oblong-ovate, sides nearly parallel. Uniform dull green or greenish-yellow; 
antennz with last three joints piceous. Thorax twice as wide as long, the angles all 
_ broadly rounded; margin very broad, flat and 
translucent. Elytra with humeral angles 
prominent, margins broadly flattened, punc- 
tures very coarse and close-set; intervals nar- 
row. Length 5-5.5 mm. 
DEVELOPMENT. 
OVIPOSITION. 
YO a, 
8 eG) 6 
On eggplant the greater number of 
the eggs have been found on the 
underside of the leaves, although they 
are also placed on thesurface andsome- 
times on other portions of the plant. 
While as many as four eggs have been - 
found together, they are usually placed 
singly or in groups of two or three 
eges each. Where more than one egg 
occurs they are placed one above 
another. Surrounding the egg and extending from it in the plane of 
its greatest circumference, toform a more or less rectangular flake, is a 
thin, transparent layer of membranous substance having a brownish 
tinge. Covering this, almost without exception, is a second, larger 
flake of the same material. These are attached to each other at the 
end where the flake inclosing the egg is attached to the surface upon 
which it is placed. 
Eges were first noted in the field at Baton Rouge, La., on May 11 
and were present as late as September. 
ASRS 
O 
oe 
S06 
RO 
BO DOO 
Fig. 2.—Eggplant tortoise beetle: Adult. 
2 Enlarged. (Original.) 
PERIOD OF INCUBATION. 
During June the period of incubation of eggs kept in the insectary 
was quite constant, the larvee issuing in from four to five days after 
the eggs had been deposited. 
The following table gives the mean maximum and minimum tem- 
peratures for the insectary where the hfe-history studies were con- 
ducted, and the corresponding figures given for Baton Rouge by the 
United States Weather Bureau. Readings were taken each morning 
from a maximum and minimum thermometer. 
