DARWIN MEMORIAL. 71 



ive states of larva, pupa, and imago, susceptible to modification, as 

 well as other characteristics in insects render them particularly 

 attractive and useful to the evolutionist, and the changed aspect 

 which natural history in general has assumed since the publication 

 of the " Origin of Species" is perhaps more marked in entomology 

 than in any other branch, for its author helped to replace ridicule by 

 reason. During his voyage on the "Beagle" he collected a very 

 large number of interesting species, especially in Coleoptera, and 

 they formed the basis of many memoirs by Walker, Newman, and 

 White, and particularly by G. R. Waterhouse, who named Odontoscelis 

 Darwinii after him. These memoirs were published either in the 

 Annals and Magazine of Natural History, and in the Transactions 

 of the London Entomological Society, or in various entomological 

 periodicals, and I append a list, which, in this connection, it is not 

 necessary to read. 



Scattered through his memorable works, a "Journal of Researches 

 into the Natural History and Geology of the countries visited dur 

 ing the voyage of H. M. S. Beagle round the world," (which is best 

 known by the publisher's title, "A Naturalist's Voyage Round the 

 World,") and "The Origin of Species by means of Natural Selec 

 tion," are many interesting entomological facts, and in almost 

 every instance they are illumined by his masterly genius and his 

 keen, penetrating mind. These are so numerous, so varied, and 

 withal so widely dispersed, that I can only make reference, at this 

 time, to a few of the most important and striking of them. 



He pointed out the great preponderance of phytophagous over 

 predaceous species in the tropics as exemplifying the relation of the 

 insect and plant worlds, both of which attain their maximum in 

 those zones. Carabidse are few; Scavengers and Brachelytra very 

 common ; Rhyncophora and Chrysomekdae astonishingly numerous. 

 (Journal of Researches, etc., p. 34.) 



He showed by minute observations that the insect faunas of 

 Tierra del Fuego, separated from Patagonia only by the Straits of 

 Magellan, have nothing in common, and he discussed the influence 



