IV CONTENTS. 



PAGE 



The claw . . r-V r .49 



The comb and suckers . it -.- i* t ; . ib. 

 The Wing* in Insects. 



Their number . . , . fn;t ?i . ib. 



First pair of wings . o;'f . 50 



Wing joint pieces . . ..*>: . ib. 



Wing muscles . tii*,'*- > . ib. 



Structure of the wings . j,' . 51 



Wing ribs or nervures . IY V J . ib. 



The edge rib and its hook s % .i .; . . ib. 



The mid rib . vsff< tu^ . 52 



The mid rib branch . fc*& frH'l i&. 



The mid rib branchlets .iv-;>iJ . i6. 



The inner rib ^ i.-' . > -*v- . ift. 



The lower rib J--A!V ??a. . i^>. 



The small marginal ribs . . f . t'6. 



Terms for the circumference of the wing . 53 



Areas of the wing . . .16. 



Upper area . . ib. 



Mid area 16. 



Lower area . . a/./? . ib. 



Meshes of the wing \ f ) jirt . ib. 



Base meshes . .. :r*f.& . ib. 



Mid meshes . ,. uo-.*- ' . ib. 



Outer meshes . .%'... .. . ib. 



Streak, band, spot, and eyelet of the wings . 54 



Fringes and tail of the wings < '*<> - . ib. 



Texture of the wings v >% ^ . . ib. 



Horny wings of beetles . j>'"*i . ib. 



Leathery wings o-f locusts - . .55 



Winglet . . . 4i . ib. 



The second pair of wings '.. . . ib. 



