300 COLKdPTRHA. 



Antennae as long as head and thorax, moderately slender, gradually 

 incrassate ; 3rd joint obconical, slightly longer than broad ; joints 4 6 small 

 and subtransversely moniliform, 5th slightly enlarged ; 7th rather larger 

 than 6th, but not quite as broad as the 8th ; 9th nearly as broad as the 

 transverse 10th, the terminal large, conical, obtusely pointed, as long as 

 preceding two together. 



6th ventral segment unimpressed, twice the length of 5th, circularly 

 emarginate, 7th transversely oval, its operculum large, oblong. 



The shape of the thorax is like that of Reitter's Trichonyx longicollis, 

 3198, belonging to Section 1, but it is a much darker insect, with differently 

 formed antennae. These organs more nearly resemble those of E. hlaiidiatus, 

 but their last joint is obviously shorter and less acuminate, the intermediate 

 tibiae are simple, and the 6th ventral segment has no depression, &c. 



S. Length, quite 1| mm. ; breadth, nearly | mm. 



Rakaia Gorge. Two examples from Mr. T. Hall, found on the 9th 

 October, 1912. 



3719. Plectomorphus laminifer sp. nov. PJectomorphiis RafEray, Gen. 

 Ins. (Wytsm.), Pselaphidae, 1908, p. 105. 



Stout, moderately elongate and nitid, slightly convex ; castaneo-rufous, 

 legs and antennae paler, tarsi and palpi flavescent ; rather thickly clothed 

 with decumbent yellow pubescence and a few long outstanding setae. 



Head evidently narrower than thorax, still more so in front, as long as 

 it is, gently obliquely narrowed behind the small prominent eyes, with 

 obtuse angles ; it is finely but irregularly punctate, the forehead plane, the 

 pair of moderate foveae placed farther back than the eyes ; antennal 

 tubercles widely separated, not prolonged backwards. Thorax rather 

 broader than long, rounded and distinctly widest before the middle, 

 obliquely narrowed anteriorly, more gradually behind ; it is impunctate, 

 discal furrow moderately deep and attaining the apex, lateral foveae deep, 

 prolonged forwards as grooves at some distance from the sides ; basal fossa 

 deep, almost semicircular and with obtusely elevated hind margins, the 

 transverse stria connecting it with the lateral foveae well marked. Elytra 

 oblong, nearly double the length of thorax, slightly curvedly narrowed near 

 the base, with somewhat rounded shoulders ; sutural striae distinct, fovei- 

 form at the base and, in some lights, appearing duplicate there ; intra- 

 humeral impressions deep at the base but becoming shallow behind the 

 middle. Hind-body rather darker, as broad as the elytra but much shorter, 

 basal segment unimpressed, 2nd also horizontal but rather shorter, the 

 others deflexed. 



Femora robust, the posterior rather less so. Tibiae straight, the inter- 

 mediate a little thicker than the others, armed inwardly near the extremity 

 with a short process directed obliquely inwards, so that the thinner outer 

 portion appears more prolonged. 



Antennae about as long as the head and thorax, basal joint ( yliudric, 

 rather longer than the oblong-oval 2nd ; joints 3-5 almost e()ual, about 

 twice as long as broad ; 6th and 7th less elongate ; 8th still smaller and 

 bead-like ; 9th nearly twice as large as 8th, rather longer than the more 

 transver.se 10th ; the terminal largest, conical, and acuminate ; the club, 

 therefore, is triarticulate, and more thickly pubescent than the other joints. 



Underside nitid, bearing distinct yellow pubescence. Head with a large 

 basal foveae and a fine frontal carina. Prosternuni carinate along the 

 middle. Intermediate trochanters spined at the inner angle. Basal ventral 



