400 Transactions. 



pression. Thorax oblong, its length nearly double the breadth, curvedly 

 narrowed in front, its sides nearly straight, posterior angles rounded; 

 it is smooth along the middle, with a shallow linear impression which 

 does not reach the apex ; its punctation is a little liner than that of the 

 head, and subseriate near the middle. Elytra oblong, a third longer 

 than the thorax, rather broader than it is; apices obliquely truncate 

 towards the suture, which is sharply defined but without definite striae; 

 their sculpture is rather shallow and subseriate. Hind-body parallel, 

 rather longer but not broader than the wing-cases, 5th segment rather 

 longer than the others, the 6th much smaller and paler, its sculpture 

 indefinite, subgranular. 



Antennae elongate, filiform, pubescent; basal joint stout, not much 

 shorter than the following two combined, 2nd shorter than the elongate 

 3rd, joints 4-10 evidently longer than broad, the terminal elongate-oval, 

 subacurninate, hardly larger than the penultimate. 



Maxillary palpi stout, hairy, their 3rd joint gradually incrassate to- 

 wards the extremity, the terminal minute. Labrum fusco-rufous, large, 

 deeply triangularly impressed in the middle. Legs elongate, anterior 

 femora thick; tibiae finely setose, the posterior thickened near the ex- 

 tremity ; front tarsi with strongly dilated basal joints, which, taken 

 together, hardly exceed the slender terminal joint in length. 



This species is chiefly remarkable for its elongated thorax and elytra. 



S- Length, 7 mm; breadth, 1J mm. 



Westport. Commander J. J. Walker, R.N., before he left New Zea- 

 land gave me a specimen, marked 15. Another from Mr. G. V. Hudson, 

 under the number 254, measures 5 mm. by 1 mm., but otherwise accords 

 almost exactly with the above description. 



3192. Dimerus whitehorni sp. nov. Dimerus Fauvel. 



Slender, elongate, slightly transversely convex, nitid; rufescent, legs 

 paler, the antennae, palpi, mandibles, and tarsi flavescent. 



Head large, somewhat rounded, broader than thorax, abruptly con- 

 tracted behind, finely and distantly punctured. Thorax nearly twice 

 as long as broad, widest near the front, moderately rounded there, 

 gradually narrowed backwards, base and apex subtruncate ; its surface 

 densely and minutely sculptured, with a few distinct remote punctures 

 and an elongate central fovea. Elytra very short, widest behind, much 

 curvedly narrowed towards the base, which is no broader than that of 

 the thorax, their apices obliquely truncate towards the sutiire; they are 

 relatively coarsely but not closely punctate, and bear some depressed 

 greyish hairs. Hind-body elongate, parallel, quite half of the whole 

 length, basal segment as long as the elytra, each of the following four 

 slightly narrowed towards the base, the 6th segment transversely quad- 

 rate, 7th obconical; the pubescence is pale-yellowish, and the punctation 

 is moderately coarse, but not close. 



Underside shining, rufo-castaneous, moderately coarsely punctured, 

 clothed with distinct yellowish hairs. Prosternum with its flanks dis- 

 tinctly marked off by oblique sutures, the coxae situated at its base. 

 Mesosternum longer than metasternum. 



Eyes longitudinal, occupying quite half of the whole sides of the 

 head, moderately prominent, with coarse facets. Mandibles as long as 

 the head, falciform, with a very elongate median tooth on the inner 

 side of each. Maxillary palpi not very much shorter than the antennae, 

 the basal joint slender and elongate, the terminal large, elongate-ovate. 



