1070 COLEOPTEKA 



long as broad. Thorax very finely punctured and pubescent, a good 

 deal sinuate at the base on each side, so that the hind angles appeal- 

 prolonged backwards. Elytra with a distinct sutural stria, and 

 rather closely transversely strigose. Spurs of hind tibiae elongate. 



The male has the front and middle tarsi greatly dilated. The 

 species apparently varies much in size. 



There can be no doubt that this insect is congeneric with Cholera 

 antipodum, Kirsch, but whether it be so with our European species 

 I cannot decide at present. C. lugubris resembles a good deal the 

 European C. coracina, though very distinct by its sculpture. 



Greymouth. Mr. Helms. 



Isocolon, 



Nov. gen. 



The insect for which this genus is intended cannot be associated 

 with Aspha 'rites, though the sternal structure is very similar, nor can 

 it be placed with its Choleva allies. 



Body compact, perfectly oval, regularly convex, finely marginated. 

 Head broad, inserted up to eyes, not trigonal ; its short frontal portion 

 nearly vertical, limited behind by a slightly-curved interantennal 

 suture ; labrum incurved at apex ; mandibles broad and prominent ; 

 eyes not at all conspicuous, not convex. Antenna inserted just 

 below the edge of forehead in front of the eyes, very Anisotoma- 

 like, short ; second joint shorter and more slender than the cylindric 

 first joint ; third nearly twice the length of fourth ; joints 4-6 de- 

 crease in length ; these joints rather slender, the terminal five, ex- 

 cepting the minute eighth joint, abruptly larger; seventh, ninth, 

 and tenth transverse ; eleventh large, conical. Thorax transverse, 

 curvedly narrowed towards the front ; apex subtruncate, its angles 

 quite obtuse, not at all projecting ; base truncate, with almost rect- 

 angular angles. Scutellum small, broadly triangular. Elytra of the 

 same width as thorax at base, gradually narrowed posteriorly, 

 covering the abdomen. Legs short, tibia; straight, slender, multi- 

 spinose externally, with well-developed apical spurs ; tarsi slender 

 and elongate. Coxa contiguous, the anterior placed near the front 

 of the breast ; intermediate minute, deeply imbedded. Prosternum 

 deeply and widely emarginate. depressed or hollowed laterally. 

 Mentum truncate. Palpi with acuminate terminal joints. Meta- 

 sternum moderate, not depressed at the sides. Abdomen on a lower 

 plane. Epipleura linear behind. 



1912. I. hilaris, n.s. Shining, nearly glabrous, castaneous ; 

 head, sides of thorax, base and apex of elytra paler; tibiae dark-red ; 

 five terminal joints of antennae blackish, the others pale-ferruginous ; 

 tarsi and palpi yellow. 



Head and thorax almost without sculpture, there being only a 

 few isolated punctures along the base of the latter. Elytra with 

 about eight rows of fine punctures on each, these punctures and the 



