2 70 FAUNA HAWAIIENSIS 



oribus subobtusis, margine lateral! subtilissimo ; elytris fere unistriatis, stria secunda valde 

 abbreviata. Long. 7^ mm. 



Plate VII. fig. 16. 



Head broad, eyes conve.x, very large. Thorax finely, but not obsoletely canalicu- 

 late on the middle, almost impunctate, anterior transverse impression very deep. Elytra 

 elongate and convex, shining, impunctate, with a single well-marked stria near the 

 suture ; the lateral margin unusually fine. 



This remarkable species cannot be confounded with any other. The general shape, 

 the subglobular thorax, with the fine margins of thorax and elytra, are distinctive. 

 M. viacrops is the only species at all near it. Only two examples have been found, one 

 of which is very immature. 



Hab. Maui. Haleakala, 5000 ft., in March 1894 and May 1S96 (Perkins). 



(2) Metrothorax viacrops, sp. nov. 



Elongatus, angustus, piceus, antennis pedibusque flavis, elytrorum apice testaceo ; 

 thorace elongate, cordato, angulis posterioribus rectis, subtilius canaliculato ; elytris 

 unistriatis vel bistriatis, striis externis obsoletis. Long. 6 mm. 



Smaller than M. mo/ops, with a distinctly constricted base to the thorax, so that the 

 angles are quite rectangular. The shape is transversely a little less convex than it is in 

 AI. molops, but is more convex than in the following species. Eleven examples. 



Hab. Maui. Haleakala, on several occasions ; 4000 — 6000 ft. ; once at Olinda 

 under bark of Koa, April 1894 (Perkins). 



(3) RlctrotJiorax deverilli, Blackburn. 



CyclotJiorax deverilli ^\-asi\^\xx\\, Ent. Mo. Mag. xvi. 1879, p. 108. 



In this species the elytra have a greenish tint and are very shining: the thorax is 

 much narrowed behind with a distinct constricted part which is punctate, the angles 

 rectangular. The striation varies but is always very slight, even the sutural stria being 

 faint except at the apex, and there it is not very deep ; the antennae beyond the fourth 

 joint are infuscate-red, and the tibiae are sometimes slightly infuscate. There is always 

 some extent of yellow colour at the tip of the elytra. 



I have seen ten examples. They vary a little in the width of the thorax, and 

 slightly in the striation of the elytra, which in one or two is evident though very faint. 



Hab. Hawaii ; various localities, generally under bark of trees at an elevation of 

 about 3000 ft. (Blackburn) ; Hilo, Kilauea, on several occasions, always singly 

 (Perkins). 



(4) Metrothorax perkinsianus, sp. nov. 



Niger, elytris viridescentibus, perpolitis, antennis pedibusque rufo-testaceis, illis 

 extrorsum fuscescentibus ; elytrorum apice suturaque posterius conspicue testaceis ; 



