affecting the Corn- Crops. 
89 
iron wingfs, propelled with very great velocity (600 revolutions a 
minute). The shakings and concussions which the corn receives 
in passing in this machine are so multiplied and so quick, that the 
eggs are broken or detached from the corn ; the insect is mauled 
and killed even in the interior of the grain where it is enclosed. 
I have not been able to make this experiment on a large scale, 
because I have not had a sufficient quantity of infested corn ; but 
I have observed that some corn containing living larvae of the 
Alucita, shaken briskly by the hand in a glass bottle for an hour, 
has produced only a small number of the moths, compared with 
that which came out of the sama corn which had not been sub- 
mitted to this agitation. I have thought it my duty to record this 
fact, and to publish it." 
Tinea granella — The Wolf, or little Grain-moth. 
A moth, in some respects similar to the " Little Corn-moth " 
in its habits of life, is completely established in this country, as 
well as in every part of Europe. It is called in English works 
The mottled woollen moth," * and it has received the scientific 
appellation of Tinea granella. The caterpillars do incredible 
mischief to bonded and housed corn laid up in granaries, and 
they are, I believe, called " White Corn-worms." From April 
till August the little moth is found in granaries and magazines, 
resting by day on the walls and beams, and flying about only at 
night, unless disturbed. Soon after they have escaped from the 
chrysalis the sexes pair, and the female lays one or two eggs on 
each grain of corn until she has deposited thirty or more :•^ they 
are so minute that they can only be detected by a good magni- 
fying glass, when they appear of an oval form and of a yellowish- 
white colour. 
The small white worms hatch in a few days (sometimes it is 
]6), and immediately penetrate the grain, carefully closing up 
the aperture with their roundish white excrement, which is held 
together by a fine web (pi, P, fig. 1). When a single grain is 
not sufficient for its nourishment, the larva unites a second grain 
to the first by the same web, and thus it ultimately adds together 
a great number (fig. 2), forming a secure habitation, which at the 
same time is well stored with provisions. When the maggots are 
almost full grown, they often leave their lodgings in great num- 
bers, running over the corn and covering the whole surface so 
effectually, with a thick web of a greyish-white colour, sometimes 
forming a crust 3 inches thick, that scarcely a grain of corn is 
• Haworth's Lepidoptera Britannica, p. 563. 
t Leuwenhoek says they lay from 50 to 70 eggs, Phil. Trans., vol. xviii 
p. IW. 
