. Class book of economic entomology. Insects, Injurious and beneficial. [from old catalog]; Insects; Insects. CLASSIFICATION AND DESCRIPTION OF COMMON INSECTS 349 25 days; Y^ inch long with orange-yellow dry body and light colored head; enters the ground for a week where it forms a cell. Pupa.—Formed in a cell in the ground, 1-2 inches below surface; duration i week. Pupae of last brood hibernate, but some larvae do not pupate until spring. Parasite.—Pentarthron minutum. Control.—Readily controlled by arsenicals or tobacco-soap solu- tions, or by dry hellebore or air-slaked Fig. 232.—Wes
. Class book of economic entomology. Insects, Injurious and beneficial. [from old catalog]; Insects; Insects. CLASSIFICATION AND DESCRIPTION OF COMMON INSECTS 349 25 days; Y^ inch long with orange-yellow dry body and light colored head; enters the ground for a week where it forms a cell. Pupa.—Formed in a cell in the ground, 1-2 inches below surface; duration i week. Pupae of last brood hibernate, but some larvae do not pupate until spring. Parasite.—Pentarthron minutum. Control.—Readily controlled by arsenicals or tobacco-soap solu- tions, or by dry hellebore or air-slaked Fig. 232.—Western wheat-stem saw-fly (Cephus occidentalis): c, adult. {After Criddle, Ent. Bui. 11, Dept. Agric. Ottawa.) Rose-slugs.—Three species infest the rose, the American Rose- slug {Endelomyia cethiops Fab.), the Bristly Rose-worm (Cladius pectinicornis Fourcr) and the Curled Rose-worm (Emphytus cinctipes Nort.). They vary from J^-M inch in length. Western Wheat-stem Saw-fly {Cephus occidentalis R. and M.).— (Consult Ent. Bull. 11, Dep. Agric, Ottawa.) A native of N. America,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Lochhead, William, 1864- [from old catalog]. Philadelphia, P. Blakiston's son & co
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsects, bookyear1919
