chap, xii.] THE ORIENTAL REGION. 343 



number of species collected by myself in some of the best 

 localities. At Singapore 300 species of Coleoptera were col- 

 lected in 15 days, and in a month the number had increased to 

 520 ; of which 100 were Longicorns and 140 Ehyncophora. At 

 Sarawak in Borneo I obtained 400 species in 15 days, and 

 600 in a month. In two months this number had increased to 

 about 850, and in three months to 1,000 species. This was the 

 most prolific spot I ever collected in, especially for Longicorns 

 which formed about one-fifth of all the species of beetles. In 

 the Aru Islands in one month, I obtained only 235 species of 

 Coleoptera, and about 600 species of insects of all orders ; and 

 this may be taken as a fair average, in localities where no 

 specially favourable conditions existed. On the average 40 to 

 60 species of Coleoptera would be a good day's collecting ; 70 

 exceptionally good ; while the largest number ever obtained in 

 one day was 95, and the majority of these would be very 

 minute insects. It must be remembered, however, that many 

 very common species were passed over, yet had every species met 

 with been collected, not much more than 100 species would ever 

 have been obtained in one day's collecting of four or five hours. 

 These details may afford an interesting standard of comparison 

 for collectors in other parts of the world. 



Of Cicindelidse the most peculiarly Malayan form is Therates, 

 found always on leaves in the forests in the same localities as 

 the more widely spread Collyris. Five genera of this family are 

 Indo-Malayan. 



The Carabidse, though sufficiently plentiful, are mostly of small 

 size, and not conspicuous in any way. But there is one striking- 

 exception in the purely Malayan genus Mormolyce, the largest 

 and most remarkable of the whole family. It is nocturnal, 

 resting during the days on the under side of large boleti in the 

 virgin forest. Pericallus and Catascopus are among the few 

 genera which are at all brillantly coloured. 



Buprestidse are abundant, and very gay ; the genus Belionota 

 being perhaps one of the most conspicuous and characteristic. 

 The giant Catoxantha is, however, the most peculiar, though 

 comparatively scarce. Chrysochroa and Chalcophora are also 



