Indian forest insects of economic importance Coleoptera . mm. Larva. — White, fleshy, legless, and corrugated. This weevil is the common pest of mangoes in Northern India. Many must beLife History. acquainted with both grub and weevil, since they are often found within the fruit. The eggs are laid in March orApril on the young newly formed mango fruit, the larvae feeding in the stone. When full-fed, by which time the infestedmango will have fallen to the ground, the grub eats its way through thefruit and pupates in the soil, emerging in late June and July and on intoAugust as a perfect beetle.
Indian forest insects of economic importance Coleoptera . mm. Larva. — White, fleshy, legless, and corrugated. This weevil is the common pest of mangoes in Northern India. Many must beLife History. acquainted with both grub and weevil, since they are often found within the fruit. The eggs are laid in March orApril on the young newly formed mango fruit, the larvae feeding in the stone. When full-fed, by which time the infestedmango will have fallen to the ground, the grub eats its way through thefruit and pupates in the soil, emerging in late June and July and on intoAugust as a perfect beetle. These beetles pass through the monsoon andfollowing winter in this stage, and lay their eggs in March or April of thefollowing year. Cryptorhynchus mangiferae, — Fabr. Syst. Ent. p. 139. The life history of this insect in its main details is similar to that ofC. gravis. It is not impossible, however, that it may pass through twogenerations in the year. According to Lefroy (Indian Insect Life) it is confined to South India FIG. 289. Bengal, Assam. FAMILY CURCULIONIDAE 437 Cryptorhynchus raja, Stebbing, sp. —Chamba State, Tehri Garhwal, North-West Himalaya. Trees Attacked. — Blue Pine (Pinus excelsa}: Bre Forest, Chamba;Spruce: Deota, Tehri Garhwal. Beetle.—Elongate, rather narrow. Black, dull, with very smallpatches and tufts of a greenish-orange pubescence. Head finely rugose, small, with a slight coppery re-Description, flexion which extends down on to the basal half of rostrum ; latter not quite a third length of insect, the basal half broad, flat, punctate, with anelevate median longitudinal ridge ; the rostrum tapers to middle,thence widens gradually, shining brown, and very slightly and finelypunctate; antennae inserted above middle, the long scrobes placedat sides, the scape swollen to a knob at upper end and shorter thanrest of antenna, the club large, conical. Prothorax widest medianly,tapers in front, sides rounded, a
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbeetles, bookyear1914
