196 INDEX. 



Aphodius plagiatus, Linn., usually black in England, 61 ; two 

 distinct states of, indicated, 105. 



Apocyrtus, its concentration in the Philippine Islands, 143. 



Apotomus, common to Madeira and Sicily, 139. 



Argutor, always apterous in Madeira, 82 ; trophi of, almost iden- 

 tical with those of Calathus, 175. 



Armadillos, their peculiarity to S. America, 143. 



Armitage, Mr., on Cicindelafasciatopunctata from Mount Oly mpus,4 1 . 



Arrangement, a lineal one is not indicated in Nature, 163. 



Atlantic continent, Prof. E. Forbes on the former existence of, 137- 



Atlantis of the ancients, the impossibility of its being identified 

 with a former Atlantic region, 140 ; perhaps the New World, 141. 



Atlantis, the genus, a modification of Laparocerus, 143. 



Azores, the colonization of, by two Madeiran Helices, 133. 



Bacon, Lord, on the importance of analogies, 13; on the Atlantis 

 of the ancients, 141 ; on the necessity of observation for forming 

 science, 159. 



Banksias, their concentration in Australia, 142. 



Barriers, natural, the difference between primary and recent, 145 ; 

 their hindrance to insect diffusion, 145. 



Bembidium Atlanticum, Woll., paler in Porto Santo than in Ma- 

 deira, 66 ; the variations to which it is subject, 107, 108. 

 bistriatum, Dufts., paler in saline districts, 62. 



- ephippium, Mshm, pallid hue of, 64. 



obtusum, Sturm, varies in southern latitudes, 33. 

 pallidipenne, Illig., pallid hue of, 64. 



- saxatile, Gyll., variety of, on the south coast of England, 60. 



- Schmidtii, Woll., perhaps a state of B. callosum, 66. 

 scutellare, Germ., pallid hue of, 64. 



tabellatum, Woll., perhaps a state of B. tibiale, 66. 

 Berginus, common to Madeira and Sicily, 139. 



Black Rat, nearly exterminated in England, 178. 

 Blemus areolatus, Creutz., paler in brackish places, 62. 

 Bolitochara assimilis, Kby, smallness of, in the Scilly Islands, 73. 

 Boromorphus, common to Madeira and Sicily, 139. 

 Brachinus crepitans, Linn., two distinct sizes of, frequently indi- 

 cated, 105. 



Bradycellusfulvus, Mshm, apterous in Madeira, 85. 

 Bread-fruit Trees, their peculiarity to the South Sea Islands, 142. 



Calathus, apterous in Madeira, 82; its trophi almost identical with 



those of Pristonychus, 175. 

 complanatus , Roll., varies from altitude, 39; variety of, on one 



of the Madeira Islands, 88. 

 fuscus, Fabr., slightly modified in Madeira, 38, 85. 



