422 
Journal of Agricultural Research 
Vol. XXI, No. 6 
the edges, holding the egg securely in place. As many as eight eggs 
have been found in one Hannolita cell, in which case there was always 
a separate covering for each egg, though these coverings were usually 
attached to each other. 
The period of incubation of 79 eggs varied from 1 to 4.5 days during 
the breeding season, depending upon weather conditions. The average 
length of the incubation period for these 79 eggs was 2.4 days. 
In the process of hatching it was observed that the head of the larva 
broke through the chorion near the base of the pedicel. The eggshell 
is apparently ruptured in the same manner as is that of Ditropinotus 
aureoviridis, previously described (p. 409). 
IyARVA 
First instar (PI. 78, B, C).—The newly hatched larva is translucent 
whitish in color; the average length of three larvae was 0.4208 mm. and 
the greatest width 0.1315 mm. The larva tapers toward each extremity, 
the greatest diameter being about the third thoracic segment; the larva 
is pointed posteriorly. Just before the first molt is cast the head is much 
narrower than any of the first 8 body segments. On the front of the head 
are two rather long fleshy protuberances which very probably are the 
antennae. The antennae in this instar are fully as long as in any of the 
succeeding instars, if not longer. There are four pairs of rather prom¬ 
inent setae on the head, one pair just above and inside the antennal 
area, two pairs above the mandibles, and a pair laterad of the antennae. 
The mandibles (PI. 76, N) in this stage are simple hooks which are very 
highly chitinized and very slender and pointed. The whole head shield 
is more highly chitinized than in later instars. The body is composed 
of the usual 13 segments which bear 5 pairs of spiracles, a pair to each of 
the last 2 thoracic and first 3 abdominal segments. There are two rows 
of subdorsal setae the full length of the body that are extremely promi¬ 
nent, giving the larva almost the appearance of an Indian war bonnet 
when seen in profile (PI. 78, B, C). There are 2 lateral rows in which the 
setae on the first 2 thoracic segments are exceedingly prominent, being 
nearly three times the length of any of the remaining setae in these rows. 
There are also 2 subventral rows on the thoracic segments only. In 
addition to the setae just described, each segment is rather densely cov¬ 
ered with very minute setae which are not present in the succeeding 
instars. 
Second instar (PI. 78, D). —The color and general shape are the same 
as in the previous instar, except that the abdomen is not so pointed. 
The head of the larva is much blunter anteriorly than in the previous 
instar. Three larvae in this instar averaged 1.050 mm. in length and 
0.4316 mm. in greatest width. The antennae are slightly less prominent 
and the setae very much less prominent than in the previous instar. 
