APPENDIX I 359 



and has a habit of creeping beneath the clothing and biting 

 rather sharply. It does not occur on Christmas Island. 



Sereicoenia. 



(9) Megapenthes, sp. 



Not a common insect. It does not occur on Christmas 

 Island, where M. Andreiusi, Waterh., is the representative of the 

 genus. 



(10) Melanoxanthus melanocephalus, Fabr. 



One specimen only, flying in the sunshine, on March 2, 

 1906. Does not occur on Christmas Island, but the genus is 

 represented there by M. dolosus, Cdz., and M. litimc, Cdz. 



Heteeomera. 



(11) Opatrum, sp. (near simplex, Fabr.). 



A common insect, found mostly under the bark of the 

 coconut palms. Does not occur on Christmas Island, where 

 the genus is represented by 0. duhium, Arrow. 



(12) Ceropria induta, Wied. 



Very abundant on all the islands. Lives in rotting wood. 

 The genus is not present on Christmas Island. 



(13) Sessinia, sp. 

 Native name, Madii. 



A very common insect. Found on all the islands, and 

 freely attracted to light. It is the subject of great variations 

 in size. 



Well known to the inhabitants, Malay and European, as 

 producing an acute dermatitis. 



This species would appear to be very similar to, if not 

 identical with, S. Andreivsi, Arrow, from Christmas Island ; and 

 of that insect Dr. Andrews says that it exudes an oily liquid, 



