OF NEW ZEALAND. 197 



supra dense breviterque hispidulus, vix variegatus ; tibiis extus breviter 

 pubescentibus. 



Long, corp., 2\ mm. 



This species is extremely closely allied to C. dubius, and only differs 

 therefrom, so far as I can see, by the following characters : The 

 antenna and legs are a little stouter; and the tibia, instead of bearing 

 externally coarse setae such as are seen on the elytra, bear only a few 

 fine hairs ; the base of the thorax is less depressed, so that the outline 

 at the junction with the elytra seems less interrupted. 



Sent from Auckland by Mr. Lawson. 



352. C. robustus, n.s. Oblong, transversely convex, rather broad ; 

 piceous, legs and antennae red ; very sparingly clothed with sub-decum- 

 bent yellowish setae, the margins ciliated with erect fuscous setae. Head 

 finely granulated ; eyes very prominent. Prothorax large, quadrate, almost 

 transverse ; the sides almost straight, being indistinctly narrowed poste- 

 riorly, and very slightly rounded in front ; the base has a depression at 

 each side, but the middle is closely adapted to the elytra ; the surface is 

 without depressions, and is covered with small rounded granules. The 

 elytra are oblong, with sub-parallel sides, the scutellar and humeral 

 regions are depressed, and there are two rounded impressions in front of 

 the middle ; their sculpture is rugose, consisting of short, transverse 

 elevations. The femora are inflated, and the tibia externally arcuated, 

 and ciliated with short protuberant setae. The ninth antennal joint is 

 distinctly larger than the eighth. 



Length, ij; breadth, f line. 



This species is allied to C. dubtus, but is longer and much broader ; 

 the sculpture of the thorax of C. similis is quite different, there being 

 five more or less distinct depressions on the disc. 



I found one example at Whangarei Heads. 



Acosmetus. 



Nov. gen. 



This genus is established for the reception of species intermediate 

 between Coxelus and Syncalus. 



Body oblong, or oblong-oval, transversely convex. Head sub-quad- 

 rate, obliquely narrowed in front, epistome truncate ; it is immersed up 

 Ib the eyes. Mentum quadrangular, a little broader than long. Ligula 

 rounded in front, ciliated. Labial palpi very small ; the maxillary 

 stout, terminal joint obtuse-ovate, somewhat truncated at the extremity. 

 Labrum transverse, ciliated. Mandibles stout, bifid at apex. Eyes 

 rounded, prominent, coarsely facetted. Antennal furrows well-marked, 

 prolonged along inner side of the eyes. Antenna inserted below, in 

 front of the eyes, eleven-jointed, club three-jointed, not so long as head 

 and thorax ; basal joint large, sub-cylindric ; second stout, sub-monili- 

 form ; third elongate, slender at base, nearly twice as long as second; 

 fourth elongate, snorter than third ; joints five to eight as stout as the 



