COLYDIIDAK. 177 



are two equally indefinite, oblong inequalities; the .surface appears a 

 little uneven, so that the serial sculpture is somewhat interrupted. 



Antennae shortei' than the head and thorax; 2nd joint stout, oblong, 

 as long as tlie uncovered portion of the liasal, 'hd elongate and slendei', 

 4th a little longer than the next, joints 6-8 small and subglobular, 9th 

 slightly broader; club abruptly enlarged, terminal joint longer than 

 the transverse 10th. 



Most nearly related to B. picicornis, 2762, but much more slender ; 

 both are without thoracic lobes. In the type of 2762 the elytra, towards 

 the sides, seem to have 3 or 4 slender cQstae — there is no trace of these in 

 the present species; in the former, on each elytron, there is a con- 

 spicuous rotundate spot, formed of exceedingly minute white setae, 

 near the base, and in a variety fi-om the vicinity of Methven there are 

 several white specks towards the extremity — all these ai-e lacking in 

 B. ohsolefd. 



Length, '1 mm. ; bi'eadth, § mm. 



Rakaia Gorge, near Methven. One found amongst dead leaves on 

 the ground by Mr. T. Hall on the 1st November, 1912. 



3545. Coxelus instabilis sp. nov. Coxelus Latreille, Man. N.Z. Coleopt., 

 p. 195. 



Elongate, subparallel, subopaque; piceous, the thoiax and parts of 

 the elytra usually more or less rufescent, antennae dark red, the club 

 piceous, legs obscure fusco-rufous; the squamifoim setae vary from 

 fulvous to greyish, tliey are irregularly distributed and on most parts 

 decumbent, but on the hind part of the elytra they are suberect, and in 

 most specimens form 3 small spots or crests on each, the apparently 

 bare portions of the dorsum bear finer inconspicuous hairs, and in most 

 cases theie is a thick basal patch on each elytron. 



Head narrower tlian the thorax, with flattened granules, these, how- 

 ever, become indistinct in front. Eyes moderately large and prominent, 

 setigerous. Thorax of about equal length and breadth, slightly rounded 

 and wider before the middle than near the gently narrowed basal por- 

 tion, with rectangular, or slightly prominent, posterior angles; the 

 lateral margins are not perceptibly crenulate, and the channels inside 

 them are deeper and broader near the front than towards the base; the 

 apex is sinuate near each side, but its angles hardly project further than 

 the middle; the surface is covered with granules, in each of these there 

 is a minute puncture, there is a depression along the middle, in some 

 cases narrow, in others expanded, and the Irasal region is more or less 

 evidently trifoveate. Elytra quite double the lentrth of the thorax, 

 slightly wider than it is at the base, with subrectangular slioulders ; 

 sometimes they are impressed along the middle so that the suture appears 

 a little elevated, they l^ear series of graniiles and linear, sometimes in- 

 definite interstices, the suture on top of the posterior declivity is some- 

 what thickened but not crested. 



Antennae shortei- than the thorax, their basal joint not visible front 

 above; 2nd stout, oblong; 3rd nearly as long but much more slender; 

 joints 4-8 decrease in length; 9th obconical, distinctly larger than 8th; 

 club abruptly enlarged, its basal joint strongly transverse, the apical 

 narrower and subrotundate. 



Tibiae with short but distinct yellowish setae on the outside, those 

 along the inside very slender. 



