196 



Index 



Tracheal gill of pupa, 141 ; castinff of, 

 144. 



Tracheal gills, S3. 



Transformation, of Chironomus dor- 

 salis, 7, 119; off. mmutus, 12; of 

 C. nireipennis, 13; of Orthocladius, 

 17 ; of insects, 151 ; embryonic and 

 adult, 152. 



Transverse nerve.=, 45. 



Two groups of Chironomus-larvae and 

 pupae, II, 146, 150. 



Ventral plate of embryo, i6x. 

 Viallanes, Recherclies of, 71. 

 Vignon on histology of alimentary 



canal, 60 (note). 

 Villot on hair-worms (Gordius), 4. 



Walker on methods of fixing, staining, 

 and cutting, 177. 



Waterhouse on chitinous tunnels in 

 heads of insects, 91. 



Weismann, on insertion of larval 

 muscles, 42 ; on Coi-ethra, 49, 129 ; 

 imaginal discs of, 120 ; on develop- 

 ment of thoracic appendages, 124; 

 on continuity of germ-plasm, 156 ; 

 on embryonic development of Chiro- 

 nomus, 156. 



Wielowiejski, on oenocytes, 40; on 

 pericardial cells, 74. 



Wilkinson on mounting entire larvae, 

 181. 



Wings of fly, 104; of pupa, 140. 



THE END 



