578 FAUNA HAWAIIENSIS 



mistaken for any other Hawaiian form except it may be Phloeopora which lives in wood 

 or under bark. Dr Perkins has only found one specimen. 



Hab. Maui, Molokai. — Maui (Blackburn). — Molokai (Perkins). Near the sea. 



Stenagria, Sharp. 

 Stenagria Sharp, Biol. Centr. Amer. Col. i. pt. 2, p. 2'^,']. 



(i) Stenagria currax. Sharp. 



Falagria currax Sharp, Tr. ent. Soc. London, 1880, p. 37. 

 Stenagria ciirrax Sharp, Biol. Centr. Amer. Col. i. pt. 2, p. 233. 



Hab. Oahu, Honolulu (Blackburn). 



Fam. HYDROPHILIDAE. 



Hydkobius Leach. 

 Hydrobius Leach, Zool. Miscell. 18 17, p. 92. 



(i) Hydrobius semicylindriciis, Eschscholtz. 



Hydrophilus semicylindricus Eschscholtz, Ent. p. 41 ; Sharp, Tr. Dublin Soc. 

 III. 1885, p. 218. 



Hab. All the islands, on the plains and at various mountain elevations, in both 

 stagnant and running waters (Blackburn, Perkins). 



(2) Hydrobius ncsiticns, sp. no v. 



Oblongus, nigricans, vix nitidus, antennis palpisque rufis, pedibus piceo-rufis ; 

 elytris striatis, striis fortiter profundeque punctatis. Long. 12 mm., lat. 5 J mm. 



This is a very distinct species on account of the deep and coarse sculpture and the 

 very slight development of the mesosternal keel. The head is broader than in 

 H. semicylindricus. The arrangement of the sculpture of the elytra is almost exactly 

 the same as it is in H. semicylindricus, though the contrast in its coarseness is very 

 striking. Three specimens. 



Hab. Oahu, Kawailoa gulch, lar up, April 1893 (no. 65, Perkins). 



Dactylosternum Wollaston. 

 Dactylosternum Wollaston, Ins. Mader. 1854, p. 99. 



(i) Dactylosternum subquadratum, Fairmaire. 



Cyclotiotum subq7iadrat2tin F"airmaire, Rev. Zool. 1849, p. 412; Sharp, Tr. Dublin 

 Soc. III. 1885, p. 218. 



