. A manual of dangerous insects likely to be introduced in the United States through importations. e found in nursery stock shipments. They are usually propagatedfrom seed. As several species of insects breed in the seed, care must be taken aboutintroducing seed for planting. A. AN ASH PEST LIKELY TO BE IMPORTED. Eriophyes traxlni Nalepa. (Ash Gall Mite. Eriophyiidse; Acarina.) Host: Fraxinus excelsior, F. viridis. Injury: Forms galls in flowers, fruit, and leaves. (See text fig. 13.)Description and biology: Four-legged blister mite which causes galls by its feeding. Liable to introduction onn
. A manual of dangerous insects likely to be introduced in the United States through importations. e found in nursery stock shipments. They are usually propagatedfrom seed. As several species of insects breed in the seed, care must be taken aboutintroducing seed for planting. A. AN ASH PEST LIKELY TO BE IMPORTED. Eriophyes traxlni Nalepa. (Ash Gall Mite. Eriophyiidse; Acarina.) Host: Fraxinus excelsior, F. viridis. Injury: Forms galls in flowers, fruit, and leaves. (See text fig. 13.)Description and biology: Four-legged blister mite which causes galls by its feeding. Liable to introduction onnursery stock. Distribution: Europe,Mexico. SoRAUER, P.: Handbuchd 6 r Pflanzenkrankhei-ten, 3d ed., vol. 3, 1913,pp. 127, 128. B. OTHER IMPORTANTASH INSECTS. HEMIPTERA. Aphldidse. Prociphilus bumeliseSchranck, a gall-makinglouse of Europe, which at-tacks the tender leaves andpetioles of ash and on itsintermediate host, the fir,breeds at the roots. Theform on fir roots has beenknown as Holzneria posch-ingeri Holzner. Coccidaj. Armored—Aspidiotus (Chrysomphalus)nigropunctatus Cockerell; Fig. 13.—Ash gall mite (Eriophyes fraxini): Gall formations on twigsof Fraxinus excelsior. (Gillanders.) Chionaspis solids Linnaeus, the willow scale; Europe; attacks Fraxinus excelsior and many other afflnis Newstead; Algeria; attacks Fraxinus oxyphylla and —Fonscolombia fraxini Kaltenbach; Europe; attacks Fraxinus excelsior. Pachytylus migratorius Linnaeus, the migratory locust; Europe; injures many plants. (Meloidae). Lytta vesicatoria Linnaeus, the Spanish fly; all Europe; very injurious as adult. Cerambycidae. Cerambyx cerdo Linnaeus, the great oak borer; Europe; bores in wood. (See Oak.) Scarabseidae. Melolontha hippocastani Fabricius, a May beetle; Europe; injures the roots of seedlings of various melolontha Lmnaeus, a May beetle; Europe; mjures the roots of seedlings, and the adult
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