File:Indian forest insects of economic importance. Coleoptera (1914) (14596386430).jpg

Identifier: indianforestinse00stebuoft (find matches)
Title: Indian forest insects of economic importance. Coleoptera
Year: 1914 (1910s)
Authors: Stebbing, Edward Percy, 1870-1960
Subjects: Beetles Forest insects -- India Trees -- Diseases and pests
Publisher: London Eyre & Spottiswoode
Contributing Library: Earth Sciences - University of Toronto
Digitizing Sponsor: MSN

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
ir bases, leaving several body segments exposed. Under-surfaceof the prothorax between the coxae a darker yellow-brown. Legs bright golden yellow.Fig. 282, a, shows dorsal and side views of the $ beetle, and b, dorsal and side view of the £. Egg.—The eggs are pale yellow in colour, with a glistening surface, and about the size ofa large pins head. I have not yet seen the larva, It will probably be a small, whitish,curved, legless grub. FAMILY CURCULIONIDAE 419 The insect appears on the wing in June. From the iSth to the 2Oth of the month I found it in abundance actively engaged in Life History. laying its eggs. In a few cases the beetles were seen to be pairing, but this stage was evidently nearly over, as was evidenced by the fact that a large number of eggs had been alreadylaid. My observations showed me that never more than one egg is laid onany one leaf. The mother beetle proceeds about her egg-laying in thefollowing manner : Usually the egg is deposited to the left hand of the
Text Appearing After Image:
KID. 282.—.-//><, $ and £ beetles : , , branch of sissu showingrolled-up and basal portions of defoliated leaves : </, rolled-up leaf with C^L; inside. Sutlej Valley. I-:. I1. S.) D D 2 420 FAMILY CURCULIONIDAE midrib near the apex of the leaf. The leaf is then folded along themidrib, the surfaces on each side being turned inwards. The beetle thenrolls the leaf tightly up from the apex downwards, tucking in the outeredges, so that the ends on each side are symmetrical and the whole formsa tight little roll (fig. d). The end of the stalk where it expands intothe blade of the leaf is then partially cut through, so that the littlerolled-up mass hangs downwards. In other cases the beetle cuts theleaf at a point about one-eighth or at most one-sixth of the length ofthe leaf above its juncture with the leaf stalk. This is done in twoways: either the leaf is cut through right across by a horizontal inci-sion, only a small portion of

Note About Images