225 



GENERAL INDEX. 



Toxoptera aurantia? 



Trama, general characters of 



— fiavescens 



— pubescens 



— radicia . 



— troglodytes 



— — wiDged form . 

 Transmission of Aphides by post, eVc. 

 Tryonix rapae . 

 Tychea, remarks on 



— eragrostidis 



— phaseoli 



— setariae . 



— setulosa 



— trivialia 



Vacuna dryophila, of Huxley, identical with Calliptevus quercus 



Vander Haeven on Periphillus 



Variation in wing-veining 



Virchow on legitimate hypothesis 



Viviparism in Aphides .... 



Walker, Francis, on the winged female of Trama troglodytes 



— also of Paracleus cimiciformis 



— also of Aphis subterraneus 



— on migrations of Aphides . 

 Wallace, A. R., on climate as affecting colour of insects 



— inadequacy of heat alone to affect them 



— on sex affecting colour in insects 

 Water lilies, destruction of, by Aphides 

 Westwood, W. O., description of fossil insects 

 Wings, hooklets, use of . 



— insertions of 



— nervures and cells of 



— venation of 



Xenoneura antiquorum .... 

 Yolk-cord ..... 



Zizyphus jujuba, attacked by an Indian Rbizobius . 



PB1MTBO HY J. V.. ADI.AUU, BARTHOLOMEW CLOBX. 



