478 Mr. David Sharp's revision of the 



Adolopus, n. g. 

 Corpus parvum, rotundato-ovale, superne convexum. Antennae 

 9-articulatfce, clava elongata, laxe articulata; palpi maxillares 

 breves, articulis tribus ultimis longitudine snbsequalibus, articulo 

 pseudo-basali crassiore, mentum transversim quadratum, anterius 

 late depressum. Prosternum in naedio longitudinaliter carinatum. 

 Coxae intermediae distantes, metasterno inter eas longius pro- 

 ductum, cum processu triangulari mesostemi sutura recta con- 

 junctum, processu hoc ad latera marginato. Femora pos- 

 teriora subtus glabra ; abdomen densissime subtilissime punctato- 

 pubescens, segmento basali in medio carinato. Tarsi posteriores 

 parum elongati, et parum crassi, articulo basali brevi, secundo 

 parum elongato sed quam praecedente evidenter longiore. 



This genus will consist at present of two small New 

 Zealand species of Hijdroijhilidce having the aspect of 

 Cyclonotum, but differing therefrom by the basal joint of 

 the hind feet being shorter than the 2nd joint. Although 

 certain species — found in South America, Oceania, and 

 Australia — of the subgenus Dactylostermim show a much 

 greater abbreviation of the basal joint of the hind foot 

 than do the normal Cydonota, yet in them this joint is 

 always longer than the 2nd ; and this character, being 

 of great importance in the classification of the Hydro- 

 philidce, the reversal of the relative lengths of these two 

 joints in Adolopus necessitates its isolation. 



Adolopus hehnsi, n. s. 



Piceus, limbo dilutiore, elytrorum apice irregiilariter pallido, 

 pedibus rufis, tarsis, palpis antennisque testaceis, harum clava 

 fusca ; corpore supra crebre punctato, et in elytris seriatim fortiter 

 punctatis, seriebus ad basin desiuentibus. Long. 3 mm., lat. fere 

 2 mm. 



The punctuation on the head, thorax, and basal portions of the 

 elytra is close and rather coarse ; on the head it becomes finer in 

 front, so that on the epistome it is excessively fine, the surface 

 there being opaque and alutaceous ; the series of punctures on the 

 elytra are coarse behind, and at the sides none of them extend to 

 the base, the outer ones stopping short rather abruptly at about 

 one-fifth of the length ; those nearer the suture extend very nearly 

 to the base, becoming, however, very fine in front, and the one or 

 two next the suture hardly extend so far forwards as the two or 

 three outside them ; the sutural series becomes deepened behind 

 into an impunctate stria. 



Greymouth (Helms, No. 48). 



