. Class book of economic entomology, with special reference to the economic insects of the northern United States and Canada. Beneficial insects; Insect pests; Insects; Insects. CLASSIFICATION AND DESCRIPTION OF COMMON INSECTS 245 grey, usually banded with white; later color harmonizes with sur- roundings. Full grown in 7 to 10 days. Pupa.—Like that of Culex but with shorter, more trumpet-shaped breathing tubes; duration about 2 days. Other species of Anopheles are: A. pundipennis and A. crucians. The Salt Marsh Mosquito (^e(«5Walk.), the Swamp Mos- quito {A. syhestris Theo.) and t
. Class book of economic entomology, with special reference to the economic insects of the northern United States and Canada. Beneficial insects; Insect pests; Insects; Insects. CLASSIFICATION AND DESCRIPTION OF COMMON INSECTS 245 grey, usually banded with white; later color harmonizes with sur- roundings. Full grown in 7 to 10 days. Pupa.—Like that of Culex but with shorter, more trumpet-shaped breathing tubes; duration about 2 days. Other species of Anopheles are: A. pundipennis and A. crucians. The Salt Marsh Mosquito (^e(«5Walk.), the Swamp Mos- quito {A. syhestris Theo.) and the Irritating Mosquito (Mansonia per- turbans Walk.) are commonly met with and are annoying. On the western prairies the genus Aedes is most abundant. The eggs are laid in late summer and hatch out the following spring in the water of the melting snow. There is but one brood a year. The most common species are A. spcnccrl Theob., A. fletcheri Coq., and A. cur- rlei Coq. CECIDOMYIIDiE (GALL MIDGES) Hessian Fly (Mayetiola destructor Say).—(Consult Ent. Bull. 11, Dep. Ag., Ottawa; Bull. 116, Ont. Dep. Ag.; Cornell Bull. 194; and. Fig. 155.—The hessian fly (Mayetiola destructor): i, adult female; 2, mature larva; 3, puparium or " flax-seed "; 4, seed of flax. Enlarged about 8 times. (After Criddle, Ent. Bui. 11, Dep. Agric. Can.) bulletins by Webster and Marlatt.) An introduced pest from Europe and one of the most serious enemies of growing wheat. Distributed over the wheat regions of United States and Canada. Attacks also oats, barley, rye, Agropyron spp., Bromus, Elymus and Agrostis (Fig. 155)- Adult.—A small dusky 2-winged fly, l<^ inch long, about half the size of a common mosquito; the female with a dull reddish tinge and larger than the male; legs long; wings smoky-black, covered with fine black hairs and obscurely Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - colora
Size: 2607px × 959px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsects, bookyear1919
