26 Farmers’ Bulletin 1260. 
or beneath grain and other food. There is but one generation each 
year. The adults begin to appear in the latitude of Washington 
during May and by June have laid most of their eggs and have died. 
Farther north the 
adults appear during 
June. The larve be- 
1, a =6 come full grown in 
ast Hag \ NS \a@a)6=s about three months, 
: but instead of trans- 
forming then to the 
adult stage they con- 
\ . tinue feeding and 
Fig. 30.—The Mediterranean flour moth: a, Moth; b, molting until cold 
same from side, resting; c, larva; d, pupa (enlarged) ; 
e, abdominal joint of larva (more enlarged). The weather and then 
adult moth, with a wing expanse of a trifle less than hibernate as larve. 
one inch, is leaden gray in color, marked with trans- 4 : 
verse wavy black markings. The full-grown larva is The following spring 
whitish or pinkish in color, with small black spots, and they transform to the 
is about one-half an inch long. (Chittenden.) A BS ik 
pupa stage, in which 
the insect passes about two weeks. Because the yellow mealworm has 
but one generation each year, and is entirely an external feeder upon 
grains, it need not be feared as a serious pest. Screening and fanning 
lic. 31.—-The meal snout moth: a, Pupa and, above, webbed mass of grain showing por- 
tion of pupa protruding; b. two well-grown larve with a smaller larva at right; c, two 
adult moths. Magnified about one and one-half times. The markings on the forewings 
easily distinguish this insect from other grain pests. 
will remove it easily from grain shipments. The well-grown larvee, 
however, can do serious injury to whole grains under certain condi- 
tions when grain is held for long periods without being moved. 
