Pyralidae 
This troublesome little species is no doubt an importation from 
Europe, where it is very common. It has spread from the Atlantic 
to the Rocky Mountains. It 
has the habit of infesting 
stacks of clover-hay, and 
often does a* great deal of 
damage by weaving its webs 
of fine whitish silk mixed 
with excrement in the hay 
and devouring the leaves. 
Many cases have been re¬ 
ported in which hay had been 
rendered entirely unfit for use 
by the presence ofthese pests. 
As the larvae feed upon 
dried clover, it has been rec¬ 
ommended to make it a 
Fig. 221. —Hypsopygia costalis. 1-2, 
larvae; 3, cocoon ; 4, pupa; 5-6, moth ; 7, 
larva covered with silken web. (After 
Riley.) 
point not to stack new hay in places where the old hay is known 
to have been infected. Furthermore, as the larvae are known to 
prefer hay which is somewhat moist, it is recommended to make 
it a point to stack the hay in such a manner that it cannot be 
subjected to an excess of moisture. This may be done by build¬ 
ing the stacks upon a framework of rails elevated a little distance 
above the ground, so as to permit of the circulation of air beneath. 
Genus PYRALIS Linnaeus 
(1) Pyralis farinalis Linnaeus, Plate XLVII, Fig. 53, $ . 
Meal Snout-moth.) 
This is a cosmo¬ 
politan species, being 
quite abundant every¬ 
where. It manifests 
a decided preference 
for cereals in almost 
any form, and feeds 
upon meal, bran, and Fig. 222 .—Pyralis farinalis. a, moth; b, 
even the straw and j (After “Bull us 
Agric., New Series, Vol. IV, p. ijqA All 
husks. It undergoes twice the size of life. 
400 
(The 
larva ; 
Dept, 
figures 
