xii Table of Contents 



PAGE 



The furrows of the wing 58 



The anal furrow 58 



The median furrow 59 



The nodal furrow 59 



The axillary furrow 59 



The axillary excision 60 



The posterior lobe 60 



The methods of uniting the two wings of each side 60 



The hamuli 60 



The frenulum and the frenulum hook 61 



The jugum 61 



The fibula 61 



An expanded humeral angle of the hind wings 63 



The clothing of the wings 64 



The principal wing-veins 64 



The chief branches of the wing-veins of the prcanal area 65 



The veins of the anal area 66 



The reduction of the number of wing- veins 67 



Serial veins ■ 69 



The increase of the number of wing-veins 70 



The secondary longitudinal veins 71 



The accessory veins 71 



The marginal accessory veins 72 



The definitive accessory veins 72 



The intercalary veins 74 



The adventitious veins 76 



The anastomosis of veins 76 



The cross- veins 7^ 



The humeral cross- vein 78 



The radial cross-vein 78 



The sectoral cross- vein 78 



The radio-medial cross-vein 78 



The medial cross-vein 78 



The medio-cubital cross-vein 78 



The arculus 78 



The costal cross- veins 78 



Other cross- veins in many-veined wings 79 



The terminology of the cells of the wing 79 



Additional definitions 



The cubito-anal excision 8] 



Convex and coricave veins 81 



The ambient vein 



The humeral veins 



The pterostigma or stigma 



The bulte 81 



The appcndiculate cell 81 



The epipleurae 82 



The transverse cord 82 



The discal cell and the discal veins 82 



Chart of Geologic Time and Formations 84 



