284 ISLAND LIFE 



migratory, and thus afford none of the opportunities 

 presented by the countless hosts of migrants which pass 

 annually northward and southward along the European, 

 and esj)ecially along the North American coasts. It is 

 strictly in accordance with these different conditions that 

 we find in one case an almost perfect identity with, and 

 in the other an almost equally complete diversity from, 

 the continental species of birds. 



Insects and Land-shells. — The other groups of land- 

 animals add little of importance to the facts already 

 referred to. The insects are very scanty ; the most 

 plentiful group, the beetles, only furnishing about forty 

 species belonging to thirty-two genera and nineteen 

 families. The species are almost all peculiar, as are some 

 of the genera. They are mostly small and obscure insects, 

 allied either to American or to world-wide groups. The 

 Carabidse and the Heteromera are the most abimdant 

 groups, the former furnishing six and the latter nine 

 species.^ 



^ The following list of the beetles yet known from the Galapagos shows 

 their scanty proportions and accidental character ; the forty species be- 

 longing to thirty-three genera and eighteen families. It is taken from 

 ]\Ir. Waterhoiise's enumeration in the Froccedinq^ of the Zoological Society 

 for 1877 (p. 81), Avith a few additions collected by the U. S. Fish Com- 

 mission Steamer Albatross, and published by the i]. S. National Museum 

 in 1889. 



CaKABID^. ilALACODERMS. 



Feronia calathoides. Ablechrus darwiuii. 



,, insularis. Corynetes rufipes. 



,, galapagoensis. Bostrichus unciniatus. 



Amblygnathus obscuricornis. Tetrapriocerca sp. 

 Solenophorus galapagoensis. Lamellicorxes. 



Notaphus galapagoensis. Copris lugubris. 



Dytiscid^. Oryctes galapagoensis. 

 Eunectes occidentalis. Elaterid^. 



Acilius incisus. Physorhinus galapagoensis. 

 Copelatus galapagoensis. Heteromera. 



PALPicoRNrs. AUecula n. s. 



Tropisternus lateralis. Stomion helopoides. 

 Philhydrus sp. ,, Icevigatum. 



Staphylinid^. Ammophorus obscurus. 

 Creophilus villosus. , , cooksoni, 



Necrophaga. ,, bifoveatus. 



Acribis serrativentris. Pedonoeces galapagoensis. 

 Phalacrus darwinii. ,, pubescens. 



Dermestes vulpinus. Piialeria manicata. 



