INDEX. 



PAGE 



Abdomen . . . .67 

 Abdominal segment, second 98 

 Absence of tracheae, siarnifi- 



cance of 

 Achorutes 



— affinis 



— agaricorum 



— aquaticus . 



— armatus . 



— bielanensis 



— cellaris 



— cyanocepbalus 



— dubius 



— liumicola . 



— byperboreus 



— bypnorum 



— lai'vatus . 



— manubrialis 



— maritimus 18 



— muroruni . 



— muscorum 



— purpurescens 



— purpureias 



— rufescens . 



— similatus . 



— si mills 



— tuberculatus 



— uniungiiiculatus 

 Adaptive changes 

 Adicranns 



— corticina . 



— fimetarius 

 ^tbeocerns . 



— aquaticus . 



— cinctus 



— crystalliuus 



. 36 



20, 27, 39, 177 



. 184 



25, 39 



25, 185, 186 



21, 25, 180 



18, 25, 183 



21, 25, 179 



16, 21, 25, 179 



13, 18, 28, 178 



. 183 



. 180 



. 184 



25, 181 



. 184 



25, 72, 187, 193 



16, 25, 28, 182 



13, 18, 25, 197 



. 181 



. 184 



21, 25, 181 



16, 21, 25, 178 



. 184 



21, 197, 198 



. 186 



43,44 



. 17 



16, 191 



16, 189 



. 17 



16, 169 



16, 130 



16, 143 



PAGE 



-lEtbeocerus dimidiatus 16, 134 



— griseus . . .16, 131 



— pulcbricoi'nis . . 16, 130 



— quinquefasciatus . 16, 1.34 



— rubrofasciatus . . 16, 134 



— rufescens . . . 16, 134 

 Analytical tables of genera 



11, 17, 20, 26 

 Anoura ..... 27 



— albipes . . . .200 



— atra 199 



— chilensis .... 200 



— granaria .... 198 



— maritima .... 193 



— muscorum . 13, 21, 25, 197 



— rosea ... 25, 199 



— tuberculata . . 25, 197 

 Anourida; . . .39, 197 

 Antennae .... 58 

 — , asymmetry of . . .59 

 — , experiments on . .62 

 Anurida granaria . . . 198 



— maritima .... 193 

 Anurophorus . . 20, 27 



— ambulans . . .189 



— certus . . . .195 



— dubius .... 195 



— fimetarius . 21, 189, 191 



— Kollarii . . . .195 



— laricis . . . 21, 191 



— stillicidii . . . .196 

 Aptera, Von Siebold's order 32 

 Apteres bexapodes, Kicolet's 



synopsis of ... 20 

 Araclmides Crustaceennes, 



Lamarck's . . . * . 31 



Atelura formicaria . . 235 



