COLEOPTERA 271 



thorace elongate, basin versus minus abrupte constricto, angulis rectis, medio canalicu- 

 lato, basi mediocriter punctata, impressione transversa anteriore parum profunda baud 

 sculpturata ; elytris obsolete striatis, stria suturali ad basin et versus apicem sat pro- 

 funda. Long. 5 mm. 



Closely allied to RI. dcvcrilli, but with the constricted basal portion of the thorax 

 more definite and the hind angles therefore sharper. Almost equally near to RI. halea- 

 kalac but smaller, with the thorax less abruptly constricted at the base, and with a 

 broad, definitely yellow apex to the elytra ; the highly polished surface of the elytra is 

 remarkable. Five specimens. 



This species was discovered by the naturalist to whom we are indebted for 

 Atelothorax opt a tits. 



Hab. Maui. Haleakala. 



(5) Mctrotliorax haleakalae, sp. no v. 



Elongatus, parum convexus, niger, elytris subviridescentibus, antennis pedibusque 

 rufis, illis extrorsum, tibiis tarsisque plus minusve fuscescentibus ; prothorace majore, 

 vix transverso, basi constricta et punctata, angulis posterioribus rectis, fere acutis ; elytris 

 tenuissime striatis, stria suturali tantum ad apicem sat profunde impressa. Long. 5^ — 

 6 mm. 



Closely allied to M. deverilli, rather larger, with a larger thorax which is more 

 abruptly constricted behind, with the angles sharper. The elytra are not at all pale at 

 the tip and the suture is not, or only faintly red behind. The antennae and legs are 

 rather longer. Eleven examples. 



Hab. Maui. Haleakala, 5000 ft., on several occasions (Perkins). 



(6) ]Mctrothorax laticollis, sp. nov. 



Niger, politus, elytris viridescentibus, antennis (articulo basali excepto) palpisque 

 fuscis, pedibus antennarumque basi testaceis ; prothorace lato, posterius abrupte angus- 

 tato, angulis acute rectis, canaliculato ; elytris fere estriatis, stria suturali subtili. Long. 

 5 mm. 



I have seen only five examples of this species. Though extremely near to M. 

 perkiiisiaiuis I think it may prove distinct on account of the broader thorax which is 

 very abruptly narrowed behind, and is less punctate at the base. The colour is more 

 that of M. halcaka/ae, and so is the form of the thorax. The elytra also are compara- 

 tively shorter in proportion to their width. 



Hab. Maui. Hawaii ? Haleakala 4000 — 6000 ft. No. 680 (Perkins). I am not 

 convinced that the exponent, supposed to be from Hawaii, was really found there. It 

 is No. 686, = Kilauea viii. '95. A confusion between 680 and 686 is very easy. 



F. n. III. 35 



