Stored-Grain Pests. 41 
rotting and decaying fruit and vegetation and in the sap exuding 
from injured plants. It is quite numerous in cornfields in the South, 
swarming over the 
damaged ears and 
feeding and _ breed- 
ing in the decay- 
ing kernels. It 
is attracted to damp 
and decaying grain 
but is seldom found 
in grain that is clean 
and dry.*! 
A closely related 
beetle *? that has been 
introduced from 
abroad and is becom- 
Ing more and more lic. 57.—The larger cabinet beetle: At left, pupa within 
abundant is similar Jarval skin: in center, pupa; at right, beetle ; below, well- 
grown larva. 
in form to the corn 
sap-beetle, but is slightly larger and is a uniform, shiny, dark brown 
allover. Its habits are very similar to those of the preceding species. 
BOOK-LICE OR PSOCIDS.** 
Book-lice or psocids are minute, pale, soft-bodied, louse-like in- 
sects, about one thirty-second of an inch long, with long, slender 
antenne, differing greatly in appearance 
from other grain-infesting insects. (See 
fig. 61.) They may be whitish, almost 
transparent, or quite dark. 
Psocids are of very common occurrence 
and may be found in nearly any situation. 
They are almost omnivorous, feeding on 
any animal or vegetable matter. They are 
frequently found in grain, but while they 
have jaws and are capable of feeding upon 
solid materials, they may be disregarded as 
pests of grain. They are frequently very 
mesos The two-banded fan- . abundant in grain and are here recorded 
gus beetie. Adult. = 
because of the curiosity of persons to know 
what they are. For further information regarding them see 
Farmers’ Bulletin 1104, “ Book-Lice or Psocids.” 
" Carpophilus pallipennis Say, a purely flower-infesting beetle, has been occasionally 
reported as infesting stored corn. In these cases large specimens of the corn sap-bectle 
which closely resemble this species were probably mistaken for it. 3 
* Carpophilus humeralis Murray. 
" Troctes divinatoria Fab. et al. 
