366 COLEOPTERA. 
behind, posterior angles rectangular, base truncate, apex slightly emar- 
ginate, lateral rims well developed; disc smooth, mesial groove well marked 
but hardly attaiming the base or apex; basal region distinctly punctate, 
its fossae apparently duplicate, the outer without a definite external plica, 
the inner broader and forming a depression towards the central groove. 
Scutellum triangular, rather small. Elytra elongate-oval, widest before 
the middle, a good deal narrowed posteriorly, almost thrice the length of 
thorax, only slightly wider than it is at the base ; their finely yet distinctly 
punctate striae are deeper near the suture than at the sides; interstices 
slightly convex, the 3rd generally tripunctate, subapical plicae slender. 
The narrow head, inconspicuous eyes, feebly developed basal plicae, and 
almost duplicated fossae of the thorax distinguish this species from all that 
are known as yet. 
Length, 7} mm.; breadth, quite 2 mm. 
Routeburn, Hollyford, and Mount Earnslaw. Five during February, 
1914; also about a dozen from more southern localities of Z. subopacus 
(3689) were found by Mr. T. Hall. 
3809. Tarastethus convexus sp. nov. Tarastethus Sharp, Man. N.Z. 
Coleopt., p. 1003. 
Convex, moderately short and broad, nitid ; piceo-castaneous, the head, 
thorax, base, and suture of elytra more rufescent; lateral margins and 
apices of elytra, and the legs, pale flavo-castaneous ; antennae, tarsi, and 
palpi more or less fulvescent. 
Head moderately elongate and, including the only slightly convex eyes, 
rather narrower than the thoracic apex, with a few fine punctures in the 
elongate frontal impressions. Thorax subcordate, nearly a third broader 
than long, widest near the middle, well rounded and margined there, rather 
strongly sinuously narrowed towards the rectangular posterior angles, base 
truncate, apex shghtly emarginate ; mesial groove not attaining either base 
or apex and somewhat expanded behind, the whole basal region moderately 
closely punctate, the fossae neither very deep nor sharply defined. Elytra 
more convex than thorax, almost thrice its length, but, owing to the 
curvedly narrowed shoulders, but little broader than it is at the base, their 
sides obviously rounded, with reflexed margins, they are evidently broader 
than the thorax in the middle, somewhat sinuously narrowed and indis- 
tinctly margined behind ; their striae are rather deep near the suture, less 
so towards the sides, all rather strongly punctured; interstices a little 
convex, more or less confluent behind, the 8th plicate. 
This comes near Sharp’s 7’. puneticollis (1799), but the head is narrower 
and impunctate along the middle, the eyes are rather smaller and less 
convex, the hind-body is more oviform, and the outer striae are more 
shallow and irregular, and the coloration is altogether dissimilar. 
3. Length, 5mm.; breadth, 2 mm. 
Routeburn, north of Lake Wakatipu. Two examples found on the 13th 
February, 1914, by Mr. T. Hall. 
3810. Tarastethus diversus sp. nov. 
Shining, nearly similar in colour to 7. convexus, but the thorax more 
nigrescent ; the body more elongate and much less convex. 
Head rather narrower than front of thorax, smooth, labrum distinetly 
emarginate ; eyes unusually small, slightly convex. Thorax only a sixth 
