542 NEW SPECIES OF AUSTRALIAN COLEOPTERA, 



transverse, base somewhat rounded; densely, regularly and moder- 

 ately coarsely punctate; median line traceable almost to apex,, 

 becoming raised towards base Elytra slightly but noticeably 

 longer than prothorax, sides almost parallel: punctures rather 

 coarser and denser than on prothorax. Abdomen densely and 

 finely punctate, apical segments feebly punctate. Length to apex 

 of elytra 3, of abdomen 8^ mm. 



;^a6.— Upper Ord River, E. Kimberley, W.A. (Mr. R. Helms). 



The antennas are very short Judging by the descriptions, the 

 species which it most nearly resembles is ruhripp.nnis, Fauvel,, 

 which, however, is described as having the median prothoracic 

 line strongly elevated, the elytra no longer than the prothorax,. 

 and the abdomen black. 



P. AUSTRALis, Har.; {opacus, Redt.). Hab. — Clarence River, 



N.S.W. 



P. TRAPEzus, Fvl. Hab.—Hnj, N.S.W. 



P. Macleayi, Duv. //«&.— Tweed River, N.S.W. 



P. LATEBRicoLA, Blackb., (co-type). 



Stenus longivbntris, n.sp. 



Shining, very finely pubescent. Black, antennae brown, inter- 

 mediate joints paler, legs yellow, apical half of femora, apex of 

 tibife and tarsi infuscate ; palpi very pale, apical joint slightly 

 tinged with yellow. 



Mead moderately strongly and densely punctate; a longitudinal 

 excavation in middle which is narrower and deeper in front than 

 behind. Prothorax densely, coarsely and regularly punctate; not 

 wider at base than apex. Elytra slightly longer than prothorax; 

 densely and coarsely punctate; apex widely emarginate. Abdomen 

 very long, basal segment rather strongly, the 2nd very feebly 

 margined; lst-4th moderately strongly punctate, on apical two- 

 thirds the punctures not very dense, 5th-6th feebly punctate. 

 Under surface finely punctate, punctures denser and coarser on 

 sterna than on abdomen. Legs long, tarsi simple. Length ta 

 apex of elytra 2|, of abdomen 6^ mm. 



