^°^*i^i^^^^'l GovuiB, Coleoptera of North-Western Victoria. 155 



976. Bidessus bisfrigatus, Clark (Jan.-Dec.) 

 An extremely abundant species, measuring Jy of an inch in 

 length. It is of a yellowish tint, with the hinder part of the 

 head black, and the elytra blotched with dark brown. 



1024. Macroporus howittii, Clark (Oct.-Feb., April). 



Larger than the preceding, being nearly J of an inch long. 

 It is brown, the elytra having a black sutural stripe, a transverse 

 sub-apical band or fascia, narrowly connected with which is a 

 black blotch, placed about the middle of each elytron. I have 

 a specimen, supposed to be a variety of howittii, having the 

 black dorsal stripe, and two broad black longitudinal stripes, 

 joined at both ends, on each elytron. 



1057. Lancestes lanceolatiis, Clark (Nov.) 



An elongate oval species J an inch in length. It is brown or 

 yellowish ; the posterior half of head black ; posterior margin 

 of prothorax edged with black. The outer margins of elytra 

 are yellow, with the discal parts thickly marked with longi- 

 tudinal black lines. 



1058. Rhantus piilverosus, Steph. (Dec.-x\pril). 



This is a longer and broader insect than the last-mentioned. 

 The under surface, except legs, is black ; head brown, marked 

 wdth black round the eyes ; prothorax brown, with a black 

 transverse mark in centre. The elytra appear of a uniform 

 olive-brown tint, with pallid margins, but under a lens are seen 

 to be finely freckled or spotted with black, and each having 

 three rows of faintly impressed punctures. 



7591. Cybister tripunctatus, Oliv. (Sept. -Dec.) 



Described 115 years ago by Olivier, this is a well-known 

 and widely-distributed species. It is over an inch in length, 

 broad and depressed in form. In specimens freshly taken from 

 the water the under parts are yellowish or fulvous, and the 

 upper surface is dark olive-green, with a broad yellow margin 

 running right round. On each elytron are three longitudinal 

 rows of punctures — the one nearest the suture strongly, the 

 two outermost rather feebly, impressed. The hind legs are 

 developed into a pair of powerful fringed " oars,'' and these, 

 with the smooth, oval shape of the body, enable it to glide with 

 great ease through the water. It is carnivorous in its habits. 



1108. Eretes australis, Er. (Nov.-Dec.) 



A very common species, variable in size and colour, some 

 specimens measuring f of an inch. It is broad and flat, with 

 the under surface and legs pallid. The head and prothorax are 

 yellow, the hind margins of both marked with black, and there 

 is also a black mark between the eyes. The elytra are darker, 

 with a pale margin, and very densely and uniformly pitted with 



