1909. ] FAUNA OF COCOS-KEELING ATOLL. 157 
ACHETID®. 
(9) GRYLLODES SIGILLATUS Walk. 
Native name, “ Orong Orong.” 
Most commonly taken near to dwelling-houses; not very 
abundant. 
(10) OrNEBIUS sp. 
A very abundant species. It lives in the bushes of ironwood 
(Cordia subcordata), and passes its early stages in a rolied-up leaf. 
Neither of these species occurs on Christmas Island. 
(11) GryLLAcris sp. near signifera Stal. 
Native name “ Chingkrek.” 
This species also passes its early stages in the leaves of the 
Cordia. When adult it appears to be carnivorous; it has 
exceedingly powerful jaws, and is credited with waging war on 
the large centipedes. When put in a box with a centipede it 
certainly fights with great vigour, and though it bites the 
centipede, the fights that I have arranged ended fatally for the 
Gryllacris,—but I believe that this is by no means invariable. 
This species does not occur on Christmas Island, but the allied 
G. rufovaria takes its place. The antenne are 150 mm. long. 
(12) Puisis pecrinata Guer. 
A fairly common species, usually found in the Cordia bushes. 
It is a bright green when living. It is not found on Christmas 
Island, but P. listeri, that occurs there, is very nearly allied to it. 
(13) ConocEPHALOIDES SOBRINUS Bol. 
The male is buff-coloured, and the female green, during life. 
The species is abundant, and commonly lives in bushes. It is 
very musical. Does not occur on Christmas Island. 
Locustip&, 
(Native name, “ Blalang blalang.”) 
(14) AcRyDIUM, sp. near japonicum, Sauss. 
Very abundant on all the islands. Feeds on the fronds of the 
coconut palm. It varies greatly in size when adult, and is the 
subject of great seasonal changes of abundance and rarity. 
Tt is not found on Christmas Island. 
Although fourteen species of Orthoptera are found on the 
Cocos-Keeling atoll, and twenty-three occur on Christmas Island, 
there is only one species—Leucophea surinamensis—that is 
common to both places. Of this species Dr. Andrews took only 
a single specimen, 
