Fic. 39.—The cadelle : Pupa, 
much enlarged. The pupa 
is seldom seen as this stage 
of the cadelle’s life cycle 
is spent in a cell made in 
an inaccessible place. 
Farmers’ Bulletin 1260. 
MEXICAN GRAIN BEETLE.” 
The Mexican grain beetle is a highly 
polished, deep brown beetle about three-six- 
teenths of an inch long. While resembling 
somewhat the confused flour beetle in general 
appearance, it can be readily distinguished 
by its more polished surface and by its longer 
antenne. (Fig. 43.) 
This insect 1s common in Mexico, where 
it breeds in grain and grain products. It 
was found in this country in grain exhibits 
at the World’s Columbian Exposition, but 
is not known to be permanently established 
in this country as yet. It may be found 
in grain in the extreme South. 
SIAMESE GRAIN BEETLE.” 
The Siamese grain beetle is an elongate, 
flattened, reddish-brown beetle slightly less 
than an eighth of an inch long characterized 
Vig. 40.—The sawtoothed grain beetle: a, Well-grown larva, with kernel of wheat to 
show its relative size: b, pupa; c, adult beetle with kernel of wheat to show its rela- 
tive size. The adult beetle, about one-tenth of an inch in length, can be easily recog- 
nized by the six toothlike projections on the sides of the thorax. 
2 Phararonotha kirschi Reitt. 78 Lophocateres pusillus Klug. 
