. A manual of dangerous insects likely to be introduced in the United States through importations. ray and brown, withdusky transverse streaks; hindwings ashy gray to grayish brownwith some indistinct brown marks;antennae fringed with gray. Occurs ^June and July and flies at , rich brown in color, with three rings of spines around abdomen. Pupationoccurs in larval galleries; requires about a month. Larva, length 75-100 mm.,dirty ocher-yellow, with broad, median dorsal, mahogany-red stripe; head blackishbrown two deep-brown spots on first thoracic segment. Larval period about 3years; t
. A manual of dangerous insects likely to be introduced in the United States through importations. ray and brown, withdusky transverse streaks; hindwings ashy gray to grayish brownwith some indistinct brown marks;antennae fringed with gray. Occurs ^June and July and flies at , rich brown in color, with three rings of spines around abdomen. Pupationoccurs in larval galleries; requires about a month. Larva, length 75-100 mm.,dirty ocher-yellow, with broad, median dorsal, mahogany-red stripe; head blackishbrown two deep-brown spots on first thoracic segment. Larval period about 3years; tunnel in wood, occasionally leave trees. Eggs, brown, round, convex above,flattened below, ribbed; deposited in groups of 15 to 50 in crevices of bark; eachfemale deposits 200 to 300 eggs, which hatch in about 10 days. (See text fig. 107.) Distribution: Europe, Syria, Korea, North Africa. Theobald, F. V. Insect Pests of Fruit, 1909, p. 42. SoRAUER, P. Handbuch der Pflanzenkrankheiten, 3d ed., 1913, vol. 3, p. 322. NussLiN, Otto. Leitfaden der Forstinsektenkunde, 2d ed., 1913, p. 321, fig. -The goat moth (Cossus cossus): Larva, pupaand adult. (Henschel.) 222 A MANUAL OF DANGEROUS INSECTS. Rhabdophaga spp.(Willow Gall Midge. Itonididse [Cecidomyiidae]; Diptera.) Species: R. nielsonii Kieffer; Denmark; willow. R. saliciperda Dufour; Europe;willow, Populus alba. R. salicis Schrk.; Europe; Salix purpurea. Injury: Bore in wood and form gall-like formations. Description and biology: R. nielsonii with head and thorax beneath yellowish red, thorax dark brown above; abdomen red; length 3 mm. SoRAUER, P. Handbuch der Pfianzenkrankheiten, 3d ed., 1913, vol. 3, pp. 456, 457, fig. 277. B. OTHER IMPORTANT WILLOW INSECTS. Eriophyes tetanothrii Nalepa, blister mite; England: attacks leaves of Salii caprea. Lachnus viminalis Fonsc, plant louse: Germany: attacks shoots oi Salix viminalis. Coccidse. Armored— Aspidiotus ( Tarqionia) distincta Leonar
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