63 
particles of meal, flour, dirt, or other material. The pupa yields 
the adult iu about two weeks. 
Fig. 5 . Mediterranean Flour-motli, Epliestia kuehniella: a, cocoon 
from attached side, showing pupa thru thin silk 
wall; b, outer side of same. 
The adult moth (Fig. 4, c, f ) is*about half an inch in length, 
and about seven eighths of an inch from tip to tip across the ex¬ 
panded wings. The front wings are medium gray, sprinkled with 
blackish scales and specks, and with a V- or W-shaped black line 
crossing about a third of the distance from the base. The hind 
wings are silvery whitish, with a darker border. Both pairs of 
wings are heavily fringed. 
• 
LIFE HISTORY, HABITS, AND INJURIES 
This insect breeds thruout the year when the temperature per¬ 
mits. The female may deposit as many as two hundred eggs, 
which are placed singly in flour, in cracks of the floor, and in various 
places about the machinery of the mill. These eggs hatch in a little 
more than a week, on an average, the period being of course length¬ 
ened if the weather is cool. The caterpillars may get their growth 
in about forty days, and the pupa yields the adult in about eleven 
days. Approximately eight weeks are thus necessary to the devel¬ 
opment of a generation, with a variation of a week or more in 
one direction or the other according to the temperature. The adults 
live a little over a week. They have been known to fly at least six 
or seven rods from the place of emergence. They are active at 
night, but are not attracted to lights. 
Altho wheat flour is most commonly infested, the larv?e of 
this moth are found also in rice flour, buckwheat flour, crackers, 
