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Table 7. —Average length, in days, of the incubation 
period for eggs of the white-fringed beetle deposited on 
dates given, Florala, Ala., 1937. 
Average 
Date eggs 
incubation period 
were deposited 
Number of eggs 
(days) 
July 11-20 
729 
16.0 
July 21-30 
3,379 
13.5 
July 31-Aug. 9 
2,396 
13.9 
Aug. 10-19 
804 
15.2 
Aug. 20-29 
. 828 
16.2 
Aug. 30-Sept. 8 
1,610 
17.3 
Sept. 9-18 
1,264 
20.2 
Sept. 19-28 
1.300 
20.9 
Sept. 29-Oct. 8 
1,372 
33.4 
Oct. 9-18 
423 
63.7 
Oct. 19-28 
169 
73.7 
Oct. 29-Nov. 7 
143 
78.7 
Nov. 8-17 
47 
80.3 
Nov. 18-27 
23 
62.4 
Total 14,487 
Although larvae complete their embryonic development within the eggs 
under dry conditions, they will not emerge except under moist conditions. 
Eggs collected in the field on July 23, 1937, and kept under dry conditions 
remained viable through March 10, 1938, or for more than 7.5 months. Eggs 
collected in the field on September 24, 1937, December 10, 1937, and January 
21, 1938, were viable when collected and remained so through April 11, 1938. 
Eggs collected in the field at intervals from February 5 through April 14, 
1938, were not viable when collected. Eggs deposited in the insectary 
during 1937 and kept under dry conditions remained viable through April 11, 
1938. The moist conditions that are necessary for the emergence of the 
larvae from the eggs also cool and soften the soil, making it favorable for 
the newly emerged larvae. 
The larva 
Description . — The full-grown larva (fig. 1, D) 3/ averages approxi- 
mately one-half inch in length. The body is yellowish white, fleshy, 
3/ The illustration, lateral view, of the larva (fig. 1, D) was 
made from a specimen preserved in fluid and is an accurate representation 
of that specimen. The foregoing description was made from living larvae, 
and any discrepencies between it and the drawing are due to distortion in 
the preserved material. 
