45 



tarsorum posticorum articulo basali quara 2"^ parum breviori. 

 Long., 7— 8J 1. ; lat., 31—4 1. 

 W. Australia; Perth, Albany. &c. 



NESO (gen. nov. Sericoidarum). 

 Mentum antice leviter emarginatum ; palpi labiales modici, 

 articulo ultimo subcylindrico baud vel vix dilatato, sat 

 elongato ; palpi maxillares modici, articulo ultimo quam 

 prsecedens sat longiori ; labrum in medio vix prominulum, 

 antice (superne visum) emarginato-truncatum ; oculi magni 

 nitidi subtilissime granulati, antice a cantho profunde 

 incisi ; antennae (specierum cognitarum) 9-articulatie, clava 

 3-articulata (hac maris quam articuli 1-6 conjuncti baud 

 breviori, feminse sat breviori) ; prothorax transversus, basi 

 baud marginata ; elytra varie striata ; coxa? posticse minus 

 elongatse ; tibiae anticse extus S-dentatse, posticis sat brevi- 

 bus ad apicem dilatatis intus arcuatis ; unguiculi simplices ; 

 sterna sparsim pilosa. 

 This genus (which seems peculiar to tropical Australia) differs 

 from Colpochila in facies more widely than in structural charac- 

 ters. It is however distinct by several good characters, — espe- 

 cially its prothorax not margined at the base its short hind coxge 

 and the sparseness of the pilosity on its sterna. The canthus 

 cutting into the front part of the eye moreover is much less 

 divergent from the clypeal outline than in Colpochila, being 

 evidently a mere prolongation of the clypeus, while in Colpochila 

 it has the appearance of a carina distinct from the clypeal out- 

 line. It should be noted that this genus presents the very rare 

 (among the Australian Sericoides) character of including among 

 species with simply striate, one at least with geminate-striate, 

 elytra. In the latter however the striation is very different from 

 that of Colpochila, Scitala, &c., the width of the interstices 

 between stria and stria of the pairs being very little less than of 

 the alternate interstices and all the interstices being equally flat, 

 whereas in Colpochila, (fee, the wider interstices are twice as 

 wide (or more) as the narrower ones and the latter are distinctly 

 more convex than the former. 



N. usta, sp. nov. Ovata ; sat convexa ; nitida ; supra glabra ; 

 rufo-brunnea, capite prothorace pedibusque obscuris ; capite 

 cum clypeo sat crebre sat grosse, prothorace sparsius sub- 

 fortiter, punctulatis ; prothorace sat fortiter transverso, 

 antice fortiter angustato, lateribus sat rotundatis, basi 

 retrorsum declivi utrinque vix sinuata, angulis anticis acutis 

 subprominulis posticis rotundato-obtusis ; elytris subtilius 

 punctulato-striatis, interstitiis subtilius confuse punctulatis, 

 planis ; tarsorum posticorum articulo basali quam 2"*^ sub- 

 breviori. 



