OF NEW ZEALAND. 1329 



surface with but little coarse punctuation ; apex of elytra but little 

 acuminate. Elytra with a basal plica, which is continued on to the 

 base of the thorax either as a short punctiform impression or as a 

 distinct line. Wing-cases destitute of a distinct sutural stria. - 



2334. B. impresSUS, n.s. (Sharp ; Aquatic Coleop., p. 360.) 

 Oblongo-ovalis, lasvigatus, pernitidus, testaceus, subtus nigricans, 

 elytris fusco-testaceis ; his crebre distincte punctatis, punctis versus 

 latera apicemque obsoletioribus ; prothoracis lateribus fere paral- 

 lelis ; antennis (praesertirn in femina) crassiusculis. 



Long., 3mm. ; lat., vix IJmm. 



The male has the front and middle tarsi moderately dilated, and 

 the antennae longer and more slender than in the female. 

 Hab. New Zealand. 



2335. B. plicatus, n.s. (Sharp; Aquatic Coleop., p. 360.) 

 Oblongo-ovalis, laevigatus, nitidus, castaneo- testaceus ; elytris sat 

 crebre et fortiter punctatis, punctis lateribus et apice subtiiioribus ; 

 prothoracis lateribus subparallelis. 



Long., # 2fmm., $ 2^mrn. ; lat., IJrnm. 



Closely allied to B. impressus, but smaller and more pallid, and 

 with the antennae of the female considerably more slender. 



The male has the front and middle tarsi a good deal more di- 

 lated, and the elytra are more elongate ; the breast and abdomen 

 are black. In the female the elytra are short, and not so parallel- 

 sided ; the colour of the breast and ventral segments is more or less 

 infuscate-testaceous, and the antennae are rather shorter than they 

 are in the male, but not stouter. 



The specimens sent by Mr. Lawson from Auckland are females, 

 and are slightly larger and more distinctly punctured than those 

 sent by Captain Broun. The specimens from the Southern Island 

 also depart considerably from the type in some of the details, and 

 possibly there rnay prove to be more than one species. 



North Island, Captain T. Broun and Mr. Lawson ; Christchurch, 

 Wakefield ; Otago, Professor Hutton. 



2336. B. huttoni, n.s. (Sharp; Aquatic Coleop., p. 361.) 

 Oblongo-ovalis, supra testaceus, subtus nigricans ; elytris versus 

 suturam vix fortiter punctatis ; prothoracis lateribus subparallelis. 



Long., 3mm. ; lat., 1-J-mm. 



The male is moderately shining on the wing-cases, and has the 

 front and middle tarsi but little dilated. The female has the upper 

 surface dull, and the elytra rather shorter and broader than in the 

 male, and its antennae are stouter. 



Although very similar to B. plicatus, the two species are easily 

 distinguished when the corresponding sexes are compared ; the male 

 of B. huttoni has the anterior and particularly the middle tarsi 

 almost without dilatation, and can thus be distinguished from the 

 corresponding sex of B. plicatus ; while the female of B. huttoni is 

 readily recognised by its dull upper surface and incrassate antennae. 



Otago. A pair sent by Professor Hutton in 1877. 



