5 Stored Grain Pest Management — E-66-W A PICTORIAL KEY TO PESTS OF STORED GRAIN COMMONLY FOUND IN INDIANA

Prothorax with 6 Prothorax without mul- teeth on each side tiple teeth on each side

Prothorax Without distinct snout Distinct snout

Hardened wings (elytra) with Hardened wings (elytra) Antenna distinctly longer than 4 pale spots. Punctures on Antenna shorter than length entirely dark. Punctures of head and prothorax length of head and prothorax prothorax rounded. Devel- on prothorax elongate. together together oped wings under elytra. Sawtoothed Grain Beetle Oryzaephilus surinamensis

Prothorax hood-shaped & Prothorax not head concealed from above hood-shaped Rice Weevil Granary Weevil Sitophilus oryzae Sitophilus granarius Body subcylindrical Body flattened

Lesser Grain Borer Spider Rhyzopertha dominica Many Flat Grain Beetle Rusty Grain Beetle Cryptolestes sp. Body at least 1/4" long Body less than 1/4" long

3/8" long, thorax strongly Eyes more or less Side margins of head projecting Approx. 1" long constricted at base rounded, not divided into and partially dividing eyes

Antennal club gradually Antennal club with last three enlarged toward tip segments abruptly enlarged

Cadelle Meal Worm Tenebroides mauritanicus Tenebrio spp. Confused Flour Beetle Red Flour Beetle Conspicuous tooth on each Without tooth on protho- Tribolium confusum Tribolium castaneum front corner of the prothorax rax, body is hairy

Prothorax

Adapted from A KEY TO SOME BEETLES COMMONLY FOUND IN STORED FOODS, By Harry D. Foreign Grain Beetle Hairy Beetle Pratt and Harold G. Scott advena stercorea