112 
Observations on the various Insects 
It does not take more than six weeks to undergo all the changes, 
from the laying of the egg to the hatching of the Weevil. 
It is calculated that 6045 individuals may he reared from one 
pair of Weevils in a summer. 
As soon as the female is impregnated, she buries herself in the 
corn-heap to lay her eggs. 
The presence of these insects in the grain cannot be detected hy 
looking at a corn-heap, but on throwing the grains into water they 
Jloat. 
As long as the weather remains hot, the Weevils keep in the 
corn-heaps. 
When the mornings become cool, they leave them, and secrete 
themselves in crevices and chinks in the walls, wood, &c. 
The Weevils do not like light, and bury themselves if possible 
when exposed to it. 
The Granary -weevils are never found in the fields in England, 
and consequently the eggs are only laid when the corn is housed. 
The Granary -weevil can bear our climate much better than the 
Rice-weevil. 
In the East and West Indies Calandra Oryzae is exceedingly 
abundant in the magazines. 
They expose the grain to the sun, and winnow it frequently. 
Barley and malt suffer most from the Calandra granaria. On 
placing the beetles in a box with barley, maize, wheat, peas, and 
beans, they only attacked the two first ; but in other instances 
wheat and black oats were devoured. 
In mild seasons the Granary -weevil may be found all the year 
in warm granaries and mills ; and in sultry weather on the outsides 
of the buildings. 
Fumigating with strong-scented herbs only communicates a dis- 
agreeable odour to the grain, as the Weevils escape by burying 
themselves in the corn. 
The scent of spirits of turpentine did not appear to incommode 
the VVeevils, but it would, if persevered in, at the same time ex- 
cluding the atmospheric air. 
The fumes of sulphur failed from the same cause, and still less 
affect the larvae contained in the grain. 
Placing the corn in close cellars the worst of all proceedings, as 
the Weevils delight in darkness and being undisturbed. 
Sifting in the winter useless, as the Weevils are not then in the 
corn heaps. 
A sudden heat of 75° Fahr. will destroy the Weevils, but it will 
not suffocate them when buried in the corn heaps. 
The eggs and larvcB, as well as the Weevils, arc destroyed by 
190° i^a/ir., but it also scorches the corn. 
In Madeira the eggs are believed to be laid in the flowers oi 
the maize. 
