The geographical distribution of animals, with a study of the relations ...

320 ZOOLOGICAL GEOGKAPHY. [part hi.Distrigus, the latter having a single species in Madagascar.There are 80 genera of this family peculiar to the region, 10of which have only been found in Ceylon.Among the Lucanidae, or stag-beetles, Lucanus, Odontolabris,and Cladognathus are the most characteristic forms. Sixteengenera inhabit the region, of which 7 are altogether peculiar,while three others only extend eastward to the Austro-Malayansub-region.The beautiful CetoniidaB, or rose-chafers, are well representedby Rhomborhina, Heterorhina, Clinteria, Macronota, Agestrata,Chalcothea and maDy fine species of Cetonia. There are 17peculiar genera, of which Mycteristes, Phcedimus, Plectrone, andRhagopteryx, are Malayan ; while Narycius, Clerota, Bombodes,and Chiloldba are Indian.In Buprestidse—those elongate metallic-coloured beetles whoseelytra are used as ornaments in many parts of the world—thisregion stands pre-eminent, in its gigantic Catoxantha, its fineChrysochroa, its Indian Sternocera, its Malayan Chalcophoraand Belionota, as well as many other beautiful forms. Itpossesses 41 genera, of which 14 are peculiar to it, the restbeing generally of wide range or common to the Ethiopian andAustralian regions.In the extensive and elegant group of Longicorns, the Orientalregion is only inferior to the Neotropical. It possesses 360genera, 25 of which are Prionidse, 117 Cerambicidse, and 218Lamiidse;—about 70 per cent, of the whole being peculiar.The most characteristic genera are RhapMdopodus and JEgosomaamong Prionidse ; Neocerambyx, Euryarthrum, Pachyteria, Acrocyrta,Tetraommatus, Chloridolum, and Polyzonus among Cerambycidse;and Ccelosterna, Rhytidophora, Batocera, Agelasta, andAstathes among Lamiidse.Of remarkable forms in other families,we may mention thegigantic horned Chalcosoma among Scaraba?ida3 ; the metallicCampsosternus amoDg Elateridae ;the handsome but anomalousTrictenotoma forming a distinct family; the gorgeous Pachyrhynchiof the Philippine Islands among Curculionidse ;Diurus