320 ZOOLOGICAL GEOGRAPHY. [PART Ill. 
Distrigus, the latter having a single species in Madagascar. 
There are 80 genera of this family peculiar to the region, 10 
of which have only been found in Ceylon. 
Among the Lucanide, or stag-beetles, Lucanus, Odontolabris, 
and Cladognathus are the most characteristic forms. Sixteen 
genera inhabit the region, of which 7 are altogether peculiar, 
while three others only extend eastward to the Austro-Malayan 
sub-region. 
The beautiful Cetoniide, or rose-chafers, are well represented 
by Rhomborhina, Heterorhina, Clinteria, Macronota, Agestrata, 
Chalcothea and many fine species of Cetonia. There are 17 
peculiar genera, of which Mycteristes, Phoedimus, Plectrone, and 
Rhagopteryxz, are Malayan; while Narycius, Clerota, Bombodes, 
and Chiloloba are Indian. 
In Buprestidee—those elongate metallic-coloured beetles whose 
elytra are used as ornaments in many parts of the world—this 
region stands pre-eminent, in its gigantic Catoxantha, its fine 
Chrysochroa, its Indian Sternocera, its Malayan Chalcophora 
and Belionota, as well as many other beautiful forms. It 
possesses 41 genera, of which 14 are peculiar to it, the rest 
being generally of wide range or common to the Ethiopian and 
Australian regions. 
In the extensive and elegant group of Longicorns, the Oriental 
region is only inferior to the Neotropical. It possesses 360 
genera, 25 of which are Prionide, 117 Cerambicide, and 218 
Lamiide ;—about 70 per cent. of the whole being peculiar. 
The most characteristic genera are Rhaphidopodus and Aigosoma 
among Prionide ; Neocerambyx, Euryarthrum, Pachyteria, Acro- 
cyrta, Tetraommatus, Chloridolum, and Polyzonus among Ceram- 
bycide ; and Calosterna, Rhytidophora, Batocera, Agelasta, and 
Astathes among Lamiide. 
Of remarkable forms in other families, we may mention the 
gigantic horned Chalcosoma among Scarabzeide; the metallic 
Campsosternus among Elateride ; the handsome but anomalous 
Trictenotoma forming a distinct family; the gorgeous Pachy- 
rhynchi of the Philippine Islands among Curculionide ; Diwrus 
