8 BULLETIN 1085, U. S. DEPARTMENT OF AGRICULTURE. 
an average life cycle of 52 days. This is 18 days longer than the 
shortest record obtained and considerably shorter than the life cycle 
during the winter months. 
LONGEVITY. 
The average length of life of the adult weevil is about 152 days 
when reared in captivity. Of fertilized females one lived for 209 
days while two unfertilized females lived for 240 and 244 days, 
respectively. 
When deprived of food these weevils are eon of living for 
extended periods if the temperature is not too high. Fifty weevils 
were placed without food in a chamber with a constant temperature 
of 60° F. The majority lived for a period of 55 days, while a few 
survived for 90 days and one for 96 days. During normally warm 
weather these weevils will live for from 5 to 12 days without food. 
PARASITES. 
The larve of this weevil are attacked by three hymenopterous | 
parasites, Cercocephala elegans Westwood, Aplastomorpha vandiner 
Tucker, and Zatropis sp. 
Iba pups, and eggs are all attacked by a predacious mite, 
eae odes ventricosus Newport. 
CONTROL MEASURES. 
This weevil may be effectively controlled by the standard remedies 
advocated for the control of insect pests of stored grain. 
TECHNICAL DESCRIPTION OF IMMATURE STAGES. 
EGG, 
Egg opaque, shiny white, bottom broadly rounded, top flattened and fitting into a 
translucent cap. Length, without cap, 0.45 to 0.47 mm.; width, 0.27 to 0.32 mm. 
LARVA. 
Mature larva 2 to 2.5 mm. in length, a white, footless, fleshy grub, with body curved 
and wrinkled. Head light brown or straw color, the anterior margin and mandibles a 
darker brown. Head about as broad as long, almost circular in form. Epicranial 
and frontal sutures distinct and light in color. There are also two oblique, longitu- 
dinal, light stripes rising from the frontal sutures and coalescing with the epicranial 
suture near the base of the head. Frons subtriangular, with a distinct dark median 
line running from posterior angle to middle, and indicating carina. Frons provided 
with four pairs of large sete, sutural margins each bearing one seta. Epicranial lobes 
bearing the following setz: One close to posterior angle of frons and located in the 
oblique, longitudinal stripe rising from the frontal suture, one small seta posterior to 
this and near occiput, two anterior to it on disk of epicranium, two opposite middle of 
frons, one opposite middle of mandible, one opposite hypostomal angle of mandible 
and one on hypostoma near base of mandible. Epistoma represented by thickened 
anterior margin of the front. Pleurostoma represented by somewhat darker declivous 
