Coleoptera.] SUBANTARCTIC ISLANDS OF NEW ZEALAND. 85 



3rd glabrous, the 2nd not much shorter than the 3rd. Thorax closely adapted to the 

 base of the elytra. Scutellum invisible. Tarsi moderately elongate ; basal 2 joints 

 of the anterior in the male dilated, the inner angle of each prolonged; 4th trans- 

 verse, not in the least lobate, truncate at the extremity. 



In general contour this small member of the Carabidae somewhat resembles 

 Longosternus semistriatus from Sierra Leone and our New Zealand Amarotypus, 

 but the palpi and tarsi are essentially different, being, in fact, almost completely 

 identical with those of our Antarctic Oopterus. 



There is on each elytron, near the extremity, a curvate carina similar to that 

 of an Oopterus, but which is lacking in Amarotypus. The scutellum is distinct in these 

 two genera, in Synteratu^ it is concealed. The sternal structure resembles that of 

 Amarotypus, but the whole underside is more elevated longitudinally. The anterior 

 coxae are less prominent, the posterior are narrower at the apex and not marginated, 

 and the trochanters are more exposed and elongated. The mesosternum is decidedly 

 longer, and mstead of being depressed in front is sharply ridged along the middle. 

 The prosternum is deeply grooved along the middle as far as the back part of the 

 coxae, where it ends, and in place of being simply incurved is deeply emarginate in 

 front but quite truncate in the middle. The metasternum is broadly channelled 

 longitudinally instead of being almost unimpressed. 



The above details sufficiently indicate the complex structure and affinities of 

 the type, which, though one of the smallest, is assuredly one of the most interesting 

 insects brought to light by the members of the expedition. 



Synteratus ovalis, sp. nov. (Plate V, fig. 1.) 



Shining, cupreo-fuscous tinged with red ; the head, apex of thorax, the suture, 

 and margins of elytra rufescent ; legs, antennae, and palpi testaceous. 



Head slightly transversely convex, densely and minutely sculptured, the inter- 

 antennal suture straight : clypeus truncate in front, with 2 obvious setigerous punc- 

 tures ; front of labrum with 6 ; there is another conspicuous one near the back of each 

 eye : frontal impressions rather shallow. Thorax of the same width as the elytra 

 at the base, finely margined laterally, gently yet considerably narrowed anteriorly ; 

 posterior angles rectangular but not acute, the anterior not at all prominent ; it 

 is one-third broader than long, moderately convex, but somewhat depressed towards 

 the front angles ; the dorsal furrow does not reach the apex, there are 4 shallow 

 foveae near the base and a few indistinct punctures and feeble rugae, the surface 

 is even more minutely sculptured than the head, and there are only mere vestiges 

 of transverse striae. Elytra distinctly marginated and channelled at the sides, 

 gradually narrowed posteriorly ; their striae are moderately well defined but their 

 punctuation is not, interstices nearly quite plane, the 3rd tripunctate, there are 

 about 8 marginal punctures ; the carina is very slender at the apex, where it forms 

 the margin, and extends forwards until merged with the 6th interstice before reach- 

 ing the hind thigh. Tibiae straight, the anterior rounded at the extremity and 

 bearing 3 or 4 short and rather coarse setae, the others setose. Posterior tarsi more 

 slender and elongate than the intermediate, the basal and terminal joints of nearly 

 equal length, the 4th entire. 



J . Length, 2 lines ; breadth, | line. 



