450 FAUNA HAWAIIENSIS 



remarkable for their comparative smoothness, but they have distinct pubescence, and 

 hence have not a polished appearance. The apical portion of the abdomen has been 

 broken off. The legs are yellow. The prosternum is less flat than usual ; between the 

 coxae it is very finely margined, and is abruptly bent up behind the coxae. 

 Hab. Hawaii, Olaa, ix. 1896 (no. 688, Perkins). 



(24) Gonioryctus oppost/us, sp. nov. 



Subdepressus, haud latus, testaceus, thorace fusco-vittato, abdomine fusco-maculato, 

 elytris interdum picescentibus ; obsolete punctatus, minute pubescens, elytris aequalibus, 

 nee sulcatis neque impressis. Long. corp. 5^ mm., lat. if, long, prothoracis ii lat. 

 prothor. ij, long, elytr. 2^ mm. 



This is not like any other of the Hawaiian Nitidulidae, though it is doubtless part of 

 the precinctive network of forms. It is variable in colour, being sometimes pale yellow, 

 and in other cases the surface is more or less suffused with dark colour. The strongly 

 transverse thorax is a good deal narrowed behind, much rounded at the sides and front 

 angles, the posterior angles obtuse, the explanation of the sides remarkably conspicuous, 

 the surface subobsoletely though not very finely punctate. The elytra have neither 

 seriate punctuation nor grooves, and only traces of depressions; they have a minute 

 diffuse punctuation and pubescence. 



The female has the apex of the pygidium (PI. XIV. figs, yd and 7/) broad, and 

 almost truncate ; the fimbriae project a little behind as minute free angles ; the last 

 ventral (PI. XIV. fig. j e) is quite truncate (except at either apical angle, where it is 

 slightly produced) and the same length as the dorsal plate. The male has the pygidium 

 (PI. XIV. fig. J c) distinctly prolonged, and very obtusely acuminate in the middle; the 

 last ventral (PI. XIV. fig. j b) is slightly emarginate, and the supplementary segment 

 (PI. XIV. fig. "J a) is narrow at the tip though not pointed. 



This very distinct species has the prosternum less bent up behind the coxae than 

 the normal Goniorycti, and the eyes are rather smaller, so that it somewhat approaches 

 G. exilis. 



Hab. Hawaii. Olaa (nos. 635, 688) ; ? Kilauea (685) (Perkins). 



Nesapterus, gen. nov. 



Corpus subdepressum, apterum ; elytra lateribus explanatis ; oculi tarsique mediocres; 

 prosternum post coxas parum recurvatum. 



The type of this genus is Gonioryctus monticoia, a species formerly placed in 

 Gonioryctus with reluctance because of its aberrant character in several respects, and 

 now removed because it is found to be quite destitute of organs of flight. A new 

 species discovered by Mr Perkins closely allied to N. vioiiticola is added. 



