98 Mr. F. P. Pascoc on Additions to 



Isostira crcnafa. 



I. supra nigra, infra rufo-castanea ; antennis pedibusquo rufis ; pro- 

 thorace lateraliter crenato ; el}'tris acute costatis. 



Hah. Queensland (under bark of decaying trees). 



Oblonc:, black above ; head vertical, rather finely and closely 

 ])unctured ; eyes nearly entire ; ])roth()rax covered Avith a dull 

 brownish exudation, its sides distinctly crcnated, the disk 

 raised and having anteriorly two short strongly elevated lines 

 or ridges ; scutelluni rounded behind, indistinct ; elytra glossy 

 black (from abrasion?), each with five narrow sharjjly elevated 

 ridges and a ])roniinent line at the margin separating the epi- 

 pleura from the n])per portion, intervals of the ridges Avith two 

 lines of sh.';Uow fovea^ ; body beneath reddish chestnut ; legs 

 and antenna' pale reddish. Length 3 lines. 



Omolijnis^ cyaneiis. 



0. supra cyaneus, nitidus, infra fusco-castaneus, antennis pedibusque 

 nifis glaberrimis ; elytris fortiter seriatim et coufertim punctatis. 



Hah. Nicol Bay. 



Very dark glossy blue above ; head and prothorax very 

 smooth and finely punctured ; the latter a little gibbous ante- 

 riorly, the sides well rounded, the base and apex of nearly 

 equal breadth ; seutellum triangular ; elytra rather narrowly 

 ovate, strongly seriate-jjunctate, the punctures approximate, 

 the intervals of the lines very narrow and convex ; body be- 

 neath brownish chestnut, very glabrous ; legs and antcnnge 

 reddish, smooth. Length 4| lines. 



Mr. Masters also finds this species at King George's Soimd, 

 under the bark of growing trees. It is at present the only 

 one known not entirely black above. 



Pterohel(PUS^ arcanus. 



P. latissime ovatus, bnmneo-piceus, paulo nitidus ; elytris singulatim 

 unicostatis, lineisque subelevatis granulatis instructis, marginibus 

 late foliaceis. 



Hah. Queensland (Port Denison, under bark of living trees). 



Broadly ovate, brownish pitchy, slightly nitid ; head im- 

 punctate ; the cly^^eus, marked off by a fine line, broad and 

 rounded anteriorly ; prothorax veiy short, deeply and nar- 

 rowly emarginate at the apex, the middle of the disk Avith two 

 conspicuous fovejE ; seutellum transversely triangular ; elytra 

 moderately convex, with broad foliaceous margins raised and 

 thickened at their edges, each elytron with a glossy elevated 



• Pascoe, Journ. of Ent. i. p. 127. 

 t De Brcme, Essai &c. p. 27. 



