OF NEW ZEALAND. 1013 



slender, base plane, frontal inipi'ession indistinct ; sides rounded in 

 front, widest near the front, with a dentiform angulation at the 

 broadest part and another near the base, the intervening space 

 forming one wide undulation ; hind angles quite obsolete. Elytra 

 large, oblong, shoulders rounded, apices obliquely sinuated so as to 

 appear somewhat obtusely prolonged at the suture ; their surface 

 slightly uneven, the strise ill-defined, consisting sometimes of elon- 

 gate impressions, the fovese small. 



This, I have no doubt, is closely allied to S. i)rasinus. The side 

 of the thorax, however, if it were not for the denticle near the base, 

 v.'ould seem to be gradually narrowed from the widest part to the 

 base ; the lateral margin ceases at the ante-basa,l angulation. 



Length, 2f ; breadth, 1-| lines. 



Mount Cook. One example, a female, from Mr. H. Suter. 



Obs. — No. 1751 {Scopodes antennalis). A variety occurs near 

 Eeefton, at Boatman's, differing from the type in having the antero- 

 lateral angulation well marked, but the minute punctate-rugose 

 sculpture of the thorax is wanting, or nearly so ; the elytral stride 

 are more developed, and there are, as in the type, numerous minute 

 grey hairs behind. 



No. 134 {S. Icevifjatiis). From the same locality, also forwarded 

 by Mr. Cavell, I have a variety of this species in which the head 

 does not seem to be unusually narrow ; the elytra are not ovate, 

 merely narrowed towards the base, bearing distinct but small foveas. 

 Length, 2 lines; breadth, nearly f line. 



Huxelhydrus. 



Nov. gen. 

 {Sharp ; Trans. Boy. Dub. Soc, 1882.) 



Prosteriial 2}rocess elougdute, parallel-sided; intercoxal process of 

 metasternum not attaining the mesosternal fork ; hind tibia with a 

 distinct, slender basal portion. Goxal lines shorter than the pro- 

 sternal process. 



Under this name I have separated a species {H. synilieticus) that 

 has in some respects the appearance of the members of Bidessus, and 

 likewise is similar to that aggregate in much of its structure : it, how- 

 ever, departs from them by some very interesting characters ; the 

 prosternal process is much more largely developed and elongate, it 

 is flat and only faintly margined at the sides ; the mesosternum is 

 joined to the metasternum at a very obtuse angle ; the hind coxal 

 cavities are more widely separated from one another ; the coxal lines 

 are extremely rudimentary, being very fine and short, and visible 

 only in the immediate vicinity of the cavities. To these peculiarities 

 may be added, as of minor importance, that the prothorax is straight 

 at the sides or rather slightly narrowed towards the base ; that the 

 under-surface is densely, finely, and evenly punctured, and the elytra 

 are truncate at the apices ; and that the terminal joint of the front 

 and middle tarsi is much more elongate than in any of the Bidessi. 

 Many of the peculiarities of this insect are repeated to a greater or 



