COLEOPTERA • 579 



Hab. Kauai, Oahu, Maui, Hawaii. — Kauai, without locality. — Oahu (Blackburn) ; 

 Nuuanu valley, &c. — Maui; Jao valley. West Maui. — Hawaii, Olaa and Hilo (Perkins). 

 In decaying vegetable matter. Tahiti. 



(2) Dactylosteriinni abdoJiiiiia/e, Fabricius. 

 Sphaeridiiini abdominalc Fabricius, Syst. El. i. p. 94 ; Sharp, Tr. Dublin Soc. iii. 

 1885, p. 218. 



Hab. Oahu, Maui, Molokai, Hawaii. ^Oahu and Maui (Blackburn). — Oahu ; 

 Hawaii, Olaa; Molokai and Maui (Perkins). In decaying vegetable matter. Widely 

 distributed outside the islands. 



Omicrus, Sharp. 

 Oniicrus Sharp, Tr. ent. Soc. London, 1879, p. 81. 



(i) Oim'cncs brevipcs, Sharp. 



Oniicrus brevipes Sharp, 1. c. 



This little beetle has not been met with by Dr Perkins. It is much smaller than 

 other Hawaiian Hydrophilidae, being only i^; mm. long and i mm. broad. It has the 

 facies of a minute Cyclonotiim. 



Hab. Oahu, various elevations, generally in rotten wood (Blackburn). 



CvcLONOTUM, Erichson. 

 Cyclonotimi Erichson, Kaf. Mark r. 1837, p. 212. 



( I ) Cycloiiotuvi cxfraneitin, sp. nov. 



Ovale, conve.xum, nigrum, antennarum basi, tarsis palpisque rufis vel piceo-rufis ; 

 subnitidum, dense punctatum, stria suturali antrorsum abbreviata. Long, "j^ mm., lat. 

 vix 4 mm. 



This insect has entirely the facies of the species of Cyclo7iotiiin proper, though it is 

 of unusually large size. It differs trom C. orbicitlare, the type of the genus, by the 

 structure of the mesosternum, the anterior part of the mesosternum having a free tip 

 which projects downwards beyond the posterior part ; the posterior part of the process 

 is longitudinally raised along the middle so that the lateral margins are not conspicuous 

 as they are in C. orbicu/ajx. The palpi and the clulj of the antennae are more elongate 

 than in the old species. The punctuation is very evenly distributed and is so close as 

 to detract very much from the polish of the upper surface. 



Three specimens from Oahu, also another specimen the label of which though 

 somewhat obliterated I interpret as Kauai 1897. 



Hab. Oahu, .''Kauai. — Oahu, Waialua coast \'. 1901 and i.\. 1900 (nos. 759, 

 760, Perkins). 



