. A manual of dangerous insects likely to be introduced in the United States through importations. Eggsovate, oblong, greenish white in color, mm. long. Adults winter around base ofhost plants, reproducing in spring on under surface of leaves, where all stages may 168 A MANUAL OF DANGEROUS INSECTS. be found at same time during summer. Badly infested leaves become yellow, thenbrown, and die. (See text fig. 79.) Distribution: , Achille. Insetti nocivi all Agricoltura, 1879, p. , F. Dispense di Entomologie Agraria, 1911, p. 82. Nephopteryx rubrizonella Ragonot. (Pear
. A manual of dangerous insects likely to be introduced in the United States through importations. Eggsovate, oblong, greenish white in color, mm. long. Adults winter around base ofhost plants, reproducing in spring on under surface of leaves, where all stages may 168 A MANUAL OF DANGEROUS INSECTS. be found at same time during summer. Badly infested leaves become yellow, thenbrown, and die. (See text fig. 79.) Distribution: , Achille. Insetti nocivi all Agricoltura, 1879, p. , F. Dispense di Entomologie Agraria, 1911, p. 82. Nephopteryx rubrizonella Ragonot. (Pear Fruit Borer. Pyralidse; Lepidoptera.) Host: Pear. Injury: Destroys yearly 30 to 40 per cent of fruit. Description and biology: Adult, wing expanse 25 mm. Forewing grayish brown tograyish black, crossed by two equidistant irregularly pinnated grayish-borderedblack lines; outer margin and basal half much deeper in color; hindwing dark gray;thorax colored like forewing, abdomen paler. Two brooded; first occurs in July,second in September and October. Fupa, deep reddish brown. Pupates in core of. Fig. 79.—Tliepeartingis(Sf(-p7(oni«i«pj/n): a, Injured leaf; 6,d,nymphal stages; f, much enlarged hair; /, adult. (Costa.) fruit. Larva, length 20 mm.; spindle-shaped, color pinkish brown; attacks core offruit. Stage lasts three weeks or more. Eggs, deposited on lower surface of twigs,about 20 in a mass, covered by a white silk web. Distribution: , M. U. S. Dept. Agric, Div. Ent., Bui. 10, 1898, p. 38. Dasyneura pyrl Bouch^. (Pear Leaf-Curling Midge. Itonididse [Cecidomyiida)]; Diptera.) Host: Pear. Injury: Rolls edges of leaves. Description and biology: Adult, length 2 mm. Brown, with limpid wings and tawnypalpi. Occurs in spring. Pupates in the soil. Whitish maggots. Distribution: , F. V. Insect Pests of Fruit, 1909, p. 350. PEAR INSECTS. 169 Janus compressus Fabricius. (The Bud-stinger. Tenthredinidse; Hymenoptera.) Host: Pear. Injury: Hollows out medul
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