31G 



regions are also the ones npon wliicli the native lowland 

 vegetation Las persisted it is natural that the native insects 

 should survive here, if at all. 



On the Island of Oahu, these arid regions are found at 

 the extreme southeastern end in the vicinity of Makapuu 

 point, and again on the -Avestern side of the island from 

 Kaena point along the Waianae coast to Barber's point, and 

 thence eastward to near the Pearl River Inlet. In general 

 these regions are difficult of access, without good roads and 

 witlioiu water, so as to make camping difficult, and the sur- 

 face is irregular and difficult of passage for pedestrians, owing 

 to the growth of the glue (Acacia farnesiana) and algaroba 

 ilFrosupIs juli flora) v.hieh cover their surface. The native 

 vegetation is scattered and as a ruk' there is hut little to rej^ay 

 the insect collector for his trouble in working there. Such 

 conditions have led to a very general neglect by entomologists 

 of these regions and they have been but littk' investigated 

 excei)tiug tlie AVaianae coast and the vicinity of Koko Head. 



In 191<;, \\v. (\ X. Forbes, the botanist of the l>isho]) 

 ^Fuseum, .called my attention to the region to the south of 

 Ewa Mill and Sisal as a region where some of the endemic 

 lowland plants have survived, and in ^November of that year 

 the writer acomj^anied him on a collecting trip there. 



He was rewarded by finding there an undescribed .lassid of 

 the genus Nesoplirosyne attached to a form of Eaplioi-hhi 

 )niiliiformis growing there, and rediscovered the endemic 

 Plutella alborenosa Walsingham, discovering the feeding habits 

 of its larva. It is attached to the endemic caper, Vappanfi 

 sandu'icliiana. the young larva mining under the cuticle of the 

 green fruits, while the older larva burrows in its fleshy walls, 

 <'merging to spin a characteristic Plutella cocoon. 



In 1918 Mr. (). H. Swezey and Mr. P. H. Timberlake 

 visited the same region, finding there the Conoiopterygid, 

 Coniocampsa resiculigcra. which has rarely been taken. The 

 w-riter again visited the region on June 8 and 10. 1919, finding 

 a new Plagithmysine Cerandiycid, described on a later page 



