-30 . . . INSECTS OF SAMOA. 



■ The Hydrophilid fauna of Tahiti, Tonga and other parts of Polynesia is 

 practically unknown, and I am aware only of two species of Dactylosternum 

 {D. abdominale and D. subquadratum) living in the first-named of these islands. 

 The same is true of Fiji ; only two species have been recorded {Hydrous sabellifer 

 Fairmaire [? = H. gayndahensis MacLeay], and Ochthebius eremita Knisch). 

 Personally I have seen only two specimens from those islands ; they represent 

 a small Enochrus related to, if not identical with, an Australian or New 

 Caledonian species. Comparison of the Samoan fauna with that of these 

 countries is therefore still impossible. Apart from the present material, I have 

 only heard of three Samoan species, of which two were named by Knisch in 

 the paper of Dr. Friederichs already alluded to. I have discussed these two 

 forms in the systematic part of this paper. 



The material of which an account is given below was obtained chiefly from 

 Upolu and Tutuila ; there are also three specimens from Tau, Manua. From 

 the largest island, Savaii, I have only seen one specimen. 



. -\_ . SPHAERIDIINAE. 



A' 1. Dactylosternum abdominale Fabricius, 1792. 



■ Twelve specimens. Samoan Is. (Swale, 1917), kitchen refuse, 27.xi.1925 ; 

 Upolu : Apia, iii.1924 ; i.l925 ; Tutuila : Leone Road (Swezey and Wilder), 

 7.ix.l923 ; Pago Pago (0-300 ft., W. M. Giffard Coll.). 



This species is known to occur in all the warmer regions of the globe, but 

 has not been recorded from New Zealand. 



2. Dactylosternum subquadratum Fairmaire, 1849. 



Seventy -three specmiens. Upolu: Apia, 3.vii.l924 ; Malololelei, 24.ii.1924 ; 

 iv.l924 ; 25.iv.1924 ; vi.l924, 2000 ft. Tutuila : Pago Pago, 18.iv.l924 

 (Bryan) ; AmauH, Pago Pago, Fagasa, ix.l923 ; Tau, Manua, 27.ix.1923 

 (Swezey and Wilder). 



The type of D. subquadratum was obtained in Tahiti, and the species was 

 recognised by Sharp in his material from the Hawaiian Islands. It has also 

 been recorded from the Fiji Islands, Burn, Borneo and the Philippines. D. 

 seriatum-titanicum Knisch, 1922, described from a single specimen from Apia, 



