276 



INDEX. 



PAGE 



Testis of Papirius omatns . 83 

 Thoracic segments of Thysa- 



nura 204 



Thorax 67 



Thysanuea . ] , 32, 33, 40, 201 

 — , the order, instituted by 



Latreille .... 10 

 — , classification of the . . 31 

 — , Dana's view of the . . 34 

 — , general organization of . 201 

 — , internal anatomy of . 207 

 — , LatreiUe's classification of 



the . . . . .11 

 — , — , description of . .33 

 — , Say on the, of the United 



States .... 11 

 — , thoracic segments of . 204 

 — , Irish, Mr. Templeton on . 12 

 Tomocerus . . 20,27,39,136 

 — , mouth-parts oi . . 65 



— , muscular system of. 94 — 98 

 — , nervous system of . .89 



— celer. . . 22,139,140 



— lepidus .... 140 



— longicornis 



8, 15, 16, 22, 23, 58, 61, 137 



— niger . . 15,22,23,139 



PAGE 



Tomocerus nivalis . . 5 



— plnmbeus 4, 5, 7, 8, 10, 13, 15, 



16, 22, 23, 75, 80, 137, 138 

 Tracheae, none in Poduridse, 36, 77 



— in Trombidium . . 78 

 Tracheal system, Nicolet on 



the 76 



in Smynthurus . . 77 



Tritomurus . . .27,39,140 



— macrocephalus . . 27, 141 



— scutellatus . . . 141 

 Trombidium holosericeum . 78 

 Tullberg's monograph of the 



Lipuridse .... 30 



Yentral tube , 



35,68 



W. 



Wings, probable nature and 

 origin of the, of insects 



Xenylla . 



— brevicauda 



— maritima . 



53 



187 

 188 

 187 



^\^ 



PRINTED BS J. E. ADLAHU, BAKTHOLOMEW CLOSE, 



It 



