198 FAUNA HAWAIIENSIS 



It may be mentioned that the shrivelled, immature example does not exhibit the 

 foveae on the elytra. 



Hab. Oahu : Waianae mountains, lee-side, 2,000 ft., Feb. 1896, three specimens, 

 two ^, one %\ an extremely immature example from the same locality, April 1892 



(Perkins). 



(2) Derobroscns politits, sp. nov. 



Angustus, capite thoraceque politis, elytris viridi-auratis ; nitidus, antennis palpisque 

 rufis, pedibus piceis ; prothorace impunctato, utrinque ad angulum posteriorem im- 

 presso-punctato ; elytris in disco seriebus foveolarum profundarum munitis. Long. 8, 

 lat. 2f mm. 



Doubtfully distinct from D. micans, but with longer legs and antennae, with larger 

 impressions on the elytra, and the shoulders not quite so obsolete. The colour of the 

 elytra, if constant, would easily distinguish the two forms without an actual comparison 

 of individuals of the two. 



Hab. Oahu: Lanihuli ridge near Honolulu, 3,000 ft, 27th Oct. 1S92 (Perkins, 

 No. 42). One pair {Z and %) "from leaves of trees." 



(3) Derobrosc7is solitariits, sp. nov. 



Angustus, capite thoraceque politis, viridi-micantibus, elytris auratis, antennis 

 palpisque rufis, pedibus piceis ; prothorace impunctato, utrinque impressione parva 

 munito ; elytris seriebus foveolarum munitis. Long. 8, lat. 2f mm. 



Doubtfully distinct from the two preceding species, this unique example agrees 

 with neither ; it is of a more beautiful colour, and in general form agrees with D. politus ; 

 it has however the thorax rather longer and narrower behind, and bearing a small fovea 

 at each hind-angle, and the foveoles on the elytra are not so large. 



Hab. Oahu : Halemano, about 3,000 ft., under bark. Deer. 1892 (Perkins). One 

 female. 



Brosconymus, gen. nov. 



Corpus angustum, elytrorum humeris nullis ; prothorax angustus, lateribus obsolete 

 marginatis, margine perparum elevata, absque setis erectis ; elytra margine basali sub- 

 obsoleta. 



Except for the fact that the thorax has the lateral margin distinct, the species has 

 quite the appearance and characters of Derobroscus. There are a few species of 

 Disenockus in which the prothoracic margins are more delicate than usual (Z?. agilis 

 etc.). Brosconymus is not however allied to these ; the thoracic margin in it is not strictl)' 

 fine, but is due rather to an impressed line marking it off, than to its own elevation. 



( I ) Broscouyvi2is optatus, sp. nov. 

 Angustus, capite thoraceque politis, vix viridi-micantibus, elytris auratis; nitidus, 

 antennis palpisque rufis, pedibus piceis ; prothorace impunctato, utrinque ad angulum 



