OF NEW ZEALAND. 1019 



occultum. Oculi indivisi. Antenna 9-articulatae, articulis 3-6 

 simplicibus, clava sat elongata articulis 7 et 8 transversis. 

 Pedes intermedii contigui, mesosternum lamina erecta munitum ; 

 femora subtus baud punctato pubescentia, brevia, tibiae spinosulse, 

 tarsi posteriores articulo basali perbrevi, secundo elongate. Abdomen 

 e segmentis quinque, sat dense pubescentibus, compositum. 



This genus is allied to the New World Derallus, with which, 

 however, it is far from closely agreeing, and is systematically dis- 

 tinguished by the 9- jointed antennae, and by the joint preceding the 

 the club being simple. It may be placed in the New Zealand list 

 near to Saphydrus, though it is far from being allied to that genus 

 in most of the peculiarities of its structure. 



1825. T. helmsi. (Sharp; Trans. Ent. Soc. Loncl, 1884, p. 474.) 

 Ovalis, omnium convexissimus, niger, supra seneus, antennis pal- 

 pisque testaceis, pedibus rufis ; nitidus, parce obsoleteque punctatus; 

 elytris ad latera et posterius seriebus abbreviatis punctorum 

 majorum. 



Long., 3mm. ; lat., If mm. 



The excessively convex form, and the shining brassy upper 

 surface, together with the peculiar sculpture of the wing-cases, 

 readily distinguish this from all the other New Zealand Hydro- 

 philidse. The base of the thorax is extremely rounded near the 

 sides, so that the hind angles are very obtuse, almost quite rounded ; 

 on the posterior part of the icing-cases there are series of coarse 

 punctures directed obliquely somewhat upwards, but quite absent 

 from the anterior portions ; on the wide interstices between these 

 series are numerous finer punctures, but the basal region is only 

 very finely and sparingly punctate ; there is an abbreviated sutural 

 stria, which does not reach half-way to the front. 



I am greatly obliged to Mr. Helms for presenting me with the 

 only example yet found of this insect. It was captured near Grey- 

 mouth. 



Hydrostygnus. 



Nov. gen. 

 (Sharp; Trans. Ent. Soc. Loncl., 1884, p. 475.) 



Corpus ovale, convexum; labrum porrectum, emarginatum, _papt 

 maxillares crassiusculi, parum elongati, articulo pseudo-basali sat 

 elongate, sequente longiore, hoc quam ultimo paulo longiore ; men- 

 turn baud latum, longitudine vix latius ; antenna 9-articulatse, arti- 

 culis intermediis omnino discretis; pedes intermedise plus minusve 

 distantes, metasternum inter eas productum, cum mesosterni pro- 

 cessu conjunctum ; tibiis crassis, mucronibus elongatis praesertim 

 anteriorum, femoribus posterioribus subtus punctatis, sed vix 

 perspicue pubescentibus, tar sis omnibus subtus densius pubescenti- 

 bus, posteriorum articulo basali brevi quam secundo triple breviore ; 

 corpore subtus omnium densissime subtilissime pubescente. 



This is another peculiar genus ; it bears a great resemblance in 

 appearance to Cyclonotum, but belongs rather to the Hydrobiini in 



