COLEOPTERA 267 



(24) Tliriscothorax brevis, Blackburn. 



Cyclothorax bi'evis Blackburn, Ent. Mo. Mag. xv. 1878, p. 123. 



Not very likely to be confounded with any other species though it has no very 

 salient character. Size medium, colour above dark bronzy, after-body short and convex, 

 moderately deeply striate ; hind angles of thorax obtuse. Eighteen specimens. 



Hab. Oahu. Not very rare ; among decaying leaves at an elevation of about 

 2000 ft. (Blackburn). Mountains Honolulu, December 1900 (Perkins). 



(25) Tliriscothorax laticollis, sp. nov. 



Fuscus, antennarum basi, palpis peclibusque testaceis, femorum basi nigricante ; 

 prothorace lato, valde transverse, opaco ; elytris abnormaliter sculpturatis, profunde 

 striatis, interstitiis hie inde subsymmetrice fractis, fragmentis disordinatis. Long. 4^ mm. 



By the extraordinary sculpture of the elytra allied to T. perkinsi, but with a very 

 different thorax : this is but little narrower than the elytra, gently rounded at the sides, 

 and slightly narrowed behind, but without a constriction ; the hind angles are very 

 sharply marked and slightly obtuse : the surface is flat and dull, feebly wrinkled, of a 

 dull reddish colour at the sides, darker on the middle, the median channel is present, 

 the anterior impression is rendered somewhat indistinct by the numerous minute longi- 

 tudinal strigosities that are connected with it. The grooves on the elytra are deep, and 

 the convex interstices are here and there broken ; on each side, about the fifth, sixth and 

 seventh striae, there is an elongate patch of irregular fragments of the disintegrated 

 interstices. One specimen. 



In the form of the thorax this insect is allied to JMecyclothorax imiltipitnctatits \ 

 and at each hind angle ot the thorax there is an excessively minute erosion of the 

 surface at the spot where the seta is situate in the species of Mccyclothorax referred to. 



Hab. Molokai, 3500 ft., 5 June, 1S93 (Perkins). 



(26) Thriscotliorax bradydcrus, sp. nov. 



Brevis, latus, robustus, niger, supra aeneus, antennis palpis pedibusque testaceis, 

 illis extrorsum, his tibiis tarsisque sordidis ; thorace valde transverso, lateribus posteri- 

 oribus leniter breviter sinuatis, angulis posterioribus fere rectis ; elytris sat profunde 

 striatis, striis impunctatis. Long, vix 5 mm. 



Remarkable by its short, broad form ; head short and Inroad. Thorax very broad, 

 dull, brassy, the lateral margin yellowish, the anterior impression rather deep, strongly 

 crenate, the central channel deep, the base much punctate. Elytra broad, shoulders 

 but little incurved : deeply striate, but the striae not punctured. Two specimens. 



Hab. Molokai. On the boggy plateau below the densest forest, about 4000 ft., 

 June 1896 (Perkins). 



