Indian forest insects of economic importance Coleoptera . third. Legscoarsely punctate, femora comparatively slender with a fringe of long hairs beneath, and with along sharp tooth close to apex. Length, 8mm. to gimrn. ; breadth, 3^ mm. to 279 shows a dorsal and side view of this beetle. Larva.—The larva when full-grown is a fat white grub usually more or less curved, withtwelve segments, the middle ones thicker than those at either end. Head small and brightyellow-brown in colour. Length, | in. See fig. 279. Pupa.—The pupa is of the ordinary curculionid shape. The beetle appears on t
Indian forest insects of economic importance Coleoptera . third. Legscoarsely punctate, femora comparatively slender with a fringe of long hairs beneath, and with along sharp tooth close to apex. Length, 8mm. to gimrn. ; breadth, 3^ mm. to 279 shows a dorsal and side view of this beetle. Larva.—The larva when full-grown is a fat white grub usually more or less curved, withtwelve segments, the middle ones thicker than those at either end. Head small and brightyellow-brown in colour. Length, | in. See fig. 279. Pupa.—The pupa is of the ordinary curculionid shape. The beetle appears on the wing at about the beginning of August, but at present it is not known when or where it lays its Life History. eggs. Larvae were found full-fed in walnuts in the first week in July, and it is therefore probable either (i) that the weevil is to be found on the wing throughout the autumn, hibernatingunder bark or decaying leaves, stones, etc., on the ground, and coming out tolay its egg on or near the young 2 flowers of the walnut in March or April;. FAMILY CURCULIOXIDAE 413 or (2) it lays its eggs on the twigs near the young flower-buds in the autumnof the year in which it issues as a beetle. No external holes are to be foundon the green outer covering of the walnut. I first noticed the attack in theBaghi Forest, Bashahr Division, my attention being attracted by thenumber of fallen walnuts littering the path beneath a large tree. I cut opensome of these nuts and found in them the nearly mature fat curved grubs ofthis weevil. A large number of nuts were examined, and four to five grubsper nut appeared to be the usual number present, but in some cases eight,eleven, and in one or two as many as thirteen larvae were cut out of a singlewalnut.* The attacks of these grubs cause the fruit to wither, and about thefirst week in July the nuts drop from the tree and the larvae enter the earthand pupate there about the middle of the month. Fifteen to twenty dayssuffice for this stage,
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbeetles, bookyear1914
