Insect pests of farm, garden and orchard . Fici. 136.—The grain weevil (Cdldndrii granuria):a, beetle; b, larva; c, pupa, d, the rice weevil(C. oryza): beetle—all enlarged. (After Chit-tenden; U. S. Dept. Agr.) 188 INSECT PESTS OF FARIM, GARDEN AND ORCHARD cycle requires from six to ten weeks, ])ut in summer it is leclucedto about twenty-five days. Thus there are from tliree to sixor more generations during a season, according to tlH> Red or Square-necked Grain-beetle* is about (Jiesamesize as the last species, l)ut is of a reddish-brown color, and thethorax is ahnost square, n
Insect pests of farm, garden and orchard . Fici. 136.—The grain weevil (Cdldndrii granuria):a, beetle; b, larva; c, pupa, d, the rice weevil(C. oryza): beetle—all enlarged. (After Chit-tenden; U. S. Dept. Agr.) 188 INSECT PESTS OF FARIM, GARDEN AND ORCHARD cycle requires from six to ten weeks, ])ut in summer it is leclucedto about twenty-five days. Thus there are from tliree to sixor more generations during a season, according to tlH> Red or Square-necked Grain-beetle* is about (Jiesamesize as the last species, l)ut is of a reddish-brown color, and thethorax is ahnost square, nearly as broad as the abdomen, andnot notched on the sides. It breeds in corn in the field and inthe granary, first destroying the germ, so that it is especially. Fig. 137.—^The saw-toothed grain beetle {Silvanus Surinam ens In): a, adultbeetle; b, pupa; c, larva—all enlarged; d, antenna of larva—still more•enlarged; d, the red or square-necked grain beetle (Cathartus gcmellatusDuv.) (After Chittenden, U. S. Dept. Agr.) injurious to seed-corn. It feeds mostly out of doors, thoughsometimes infesting the granary. The Ioreign (irain-beetle f is of much the same generalai)pearanc(, but smaller and of a more robust appearance Iteeds upon a great variety of stored products as well as grain,but rarely becomes troublesome. The Cadelle t also has lli(> bad hal)it of first attacking theembryo or gciui of 11w kcind, and going from one korn(>l to another,thus destioys a large luimhci- for seed purposes. It possesses, * (athfirlus yemMatiis Duv. t advena Waltl. t rnauritanicus Linn. Pamily Trogositidoe. INSECTS INJURIOUS TO STORED GRAINS 180 however. I he good trail of tecdhia; on other injuiious grain-insects. The l)ee
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