INDEX. 197 



Calathus melanocephalus, Linn., smallness of, in the Scilly Islands, 



73. 



mollis, Mshm, variable in its wings, 43 ; lurid colour of, 64. 



Calcareous soils, effect of, on the aspect of insects, 66. 



Calceolarias, their concentration on the Andes, 142. 



Calosoma, a species of, ten miles from shore, 147 ; the genus, merges 



gradually into Carabus, 175. 



Syncophanta, Linn., its power of crossing the sea, 147. 



Canary Islands, migratory direction of their insect population, 1 19. 

 Carabidte, inconstant in their organs of flight, 43 ; family of, nearly 



similar throughout in its oral organs, 174. 

 Carpophilus hemipterus, Linn., unaffected by climate, 31. 

 Caulotrupis conicollis, Woll., large size of, on one of the Madeira 



Islands, 88, 109. 



lucifugus, Woll., varies from isolation, 90, 109. 



Causes, never final ones which we investigate, 191. 



Centrinus, its concentration in S. America, 143. 



Ceutorhynchus contractus, Mshm, smallness of, in Lundy Island, 



59, 73. 



Cholovocera, common to Madeira and Sicily, 139. 

 Choreius ineptus, Westw., on a winged state of, 44. 

 Chorosoma miriforme, the development of the wings of, 100. 

 Chrysomela, apterous in Madeira, 82. 

 Chrysomelce, vary from altitude, 41. 

 Chrysomelidce, almost absent in Tierra del Fuego, 47. 

 Cicindelafasciatopunctata, Germ., a state of C. sylvatica, 41. 

 CicindelidcB, often variable, 41. 

 Cillenum laterals, Sam., lurid hue of, 64. 

 Cimex apterus, Linn., the development of the wings of, 100. 



lectularius, Linn., on the development of the wings of, 45. 



Cistela sulphurea, Linn., its variability near the sea, 60. 

 Clausilia deltostoma, Lowe, a Porto-Santan form of, 134. 

 Climatal modifications significant, although small, 42. 

 Climate, not important as a disturbing cause, 23, 24, 31, 32, 42. 

 Clouded-yellow Butterfly, unaffected by climate, 31. 

 Ctypeaster pusillus, GylL, differs slightly in Madeira, 65. 

 Coast, inconstancy of insects in the vicinity of the, 57- 

 Coccinella 7-punctata, Linn., unaffected by climate, 31. 

 Colias Edusa, Fabr., unaffected by climate, 31. 

 Colour, its inconstancy in insects found near the sea, 57, 58. 



of insects, affected by isolation, 88. 



Colymbetes, a species of, captured forty-five milesfrom shore, 149, 150. 

 Compensation, generally apparent when an insect is deprived of an 



organ or sense, 81. 



Coranus subapterus, Curt., the development of the wings of, 101. 

 Cordillera, Mr. Darwin on the fauna of the, 145. 



