COLEOPTERA 211 



(54) Proterhinus pachycnemis, sp. nov. 



Rufescens, elytris nigrosignatis. Antennae mediocres, articulo secundo, quam 

 tertius, haud minus longo, sed multo crassiore, clava sat evidenter 3-articulata. Prono- 

 tum latera versus sat dense squamosum, lateribus minus fortiter rotundatis. Elytra 

 pallide squamosa, setisque pallidis erectis conspersim vestita, humeris subobscuris, haud 

 productis. Femora antica et postica miro modo incrassata, intermediis multo crassiora. 

 t. Long. 2 mm. (Plate IX. fig. 14. ^.) 



This species, which somewhat resembles P. oscillans or P. obscnrus, is quite distinct 

 by the elongate second joint of the antennae, and the extraordinarily incrassated femora, 

 the hind femur being about twice as wide as the intermediate, which itself is more 

 robust than in most of the species. A second and much damaged ^, which I refer to 

 this species, is totally different in superficial aspect, being black, with only small parts 

 of the thorax and elytra obscurely red, and the latter less nearly parallel-sided. 



Hab. Oahu. Kaala (2500 ft.), Waianae range. Two ^ examples taken, one on 

 the windward and the other the opposite side of the range. 



(55) Proterhinus laticollis, Blackb. 



Proterhimcs laticollis Blackburn, Tr. Dublin Soc. in. 1885, p. 170. 



(Plate IX. fig. 15, and 15a. Z-) 



The male of this species is a very remarkable insect, not only on account of its 

 extremely wide thorax, as indicated by Blackburn in his description, and by the name 

 which he applied to it, but still more so by the structure of the terminal joint of the 

 front tarsi, which is unlike that of any other of the genus. This joint is so extremely 

 shortened that it only just extends as far as the apex of the lobes of the preceding one. 

 The antennae are more than usually elongate and slender, and the front femora very 

 strongly incrassate, as compared with the hinder ones. In some examples the elytra 

 are quite evidently impressed across the base, but in others no trace of this is to be 

 detected. The $ of P. laticollis, on the other hand, is comparatively commonplace, 

 since neither thorax nor tarsi present the peculiar features exhibited in the $. It is 

 only to be recognised by its general similarity in colour, clothing, and the elongate and 

 slender antennae. As in the Z, the base of the elytra is sometimes sub-impressed. 

 Length 2 — 2'5 mm. 



Hab. Waianae mountains, Oahu. About 17 examples taken. 

 F. H. ir. 28 



