. Bulletin of the Department of Agriculture. Agriculture. BULLETIN 156, U. S, DEPARTMENT OF AGEICULTUEE. worm, is found in granaries and warehouses, -where it feeds upon stored products. Another genus (Eleodes) is found only in the ter- ritory west of the Mississippi Eiver, and attacks cereal crops in the field. The name " wireworm " is also incorrectly applied to several species of millipedes {Julus spp., fig. 1, c). The true wireworms, from an economic standpoint, are among the five worst pests to Indian corn and among the twelve worst pests to wheat and oats. They are also im
. Bulletin of the Department of Agriculture. Agriculture. BULLETIN 156, U. S, DEPARTMENT OF AGEICULTUEE. worm, is found in granaries and warehouses, -where it feeds upon stored products. Another genus (Eleodes) is found only in the ter- ritory west of the Mississippi Eiver, and attacks cereal crops in the field. The name " wireworm " is also incorrectly applied to several species of millipedes {Julus spp., fig. 1, c). The true wireworms, from an economic standpoint, are among the five worst pests to Indian corn and among the twelve worst pests to wheat and oats. They are also important pests to many other crops. Since 1841, when Dr. Thaddeus Harris first published an account of these insects,^ the literature of economic entomology has been replete with references to their depredations, and from the standpoint of the entomologist, as to the diffi- ^^ culty of combating them, they probably rank second only to the white grubs {Lachnosterna spp.). In view of the recently enacted Federal quarantine bill these insects assume an added interest, inasmuch as they can easily be introduced in the larval condition with- in fleshy roots, bulbs, and tubers. Mr. E. R. Sasscer, of the Federal Horticultural Board, recently intercepted an elaterid larva in the root of Aral! a cor data from Ja- pan; the larva was in good condition and is still alive in our laboratory (October, 1914). The writer has often seen the larva? of zigriotes mancus Say within potato tubers that had been in a root cellar all winter. These insects are destructive to cereal and forage crops in the larval stage only, although the adults of certain species {Lhnonius discoideus Lee, etc.) do considerable damage to the blossoms of fruit trees in the Pacific NorthAvest. and Fletcher reports- similar depre- dations of the adults of two other species {Corymhites caricinus Germ, and C. tarsal^ Melsh.). The forms attacking cereal and. 7>j7r Fio. 1.—Larv:r likely to be mistaken for wire- worms : a, Fals
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