2o6 FAUNA HAWAIIENSIS 



Closely allied to D. fractus, but distinguished by the dull surface, the want of 

 metallic colour, and by the remarkably narrow, elongate thorax ; the striae of the elytra 

 are deeper and broader, and the punctures in them larger. One male specimen. 



Hab. Molokai (Perkins): 4000ft., 8. vi. 1S93. 



(12) Disenochus micantipennis, sp. nov. 



Piceus, capite nigro, antennis palpis pedibusque flavis ; thorace dense rugoso- 

 punctato ; elytris inaequalibus, striatis, striis minus argute sculpturatis, interstitiis 5°, 7°- 

 que costato-elevatis, spatio inter suturam et interstitium quintum longitudinaliter 

 depresso, interstitiis 2°, 3°, 4° deplanatis, micantibus. Long. 7^ — 8^ mm. 



A very peculiar species having no near ally. Head shining black, impunctate, 

 vertex more or less distinctly depressed in the middle. Thorax uneven, densely and 

 coarsely sculptured, much narrowed behind, base a good deal rounded, hind angles 

 distinct, slightly turned up. Elytra piceous, with the margins and apex more or less 

 dilute, acuminate behind, the sculpture very peculiar, the interstices near the suture 

 flat and with a glassy appearance, the post-humeral interstices more or less costate, 

 the external grooves coarsely punctate. Under-surface piceous, becoming more dilute 

 posteriorly so as to be flavescent behind. 



A good series of about 90 specimens has been secured. They do not show much 

 variation. 



H.A.B. Kauai (Perkins); Mts. Waimea, 4000 ft., in April and May 1S94 ; Koho- 

 luamano, 4000 ft., April and May 1895. 



Chalcomenus, gen. nov. 



Alae magnae, tantum parte apicali subobsolescente (Plate \T. fig. 22). Prothorax 

 marginatus, ad angulum posteriorem seta erecta munitus. Tarsi posteriores filiformes 

 articulo penultimo nullo modo bilobato. 



This I distinguish from Discnocluis on account of the large wings, of which only 

 the apical portion is notably reduced in size. Colpodisciis has the hind tarsi strongly 

 bilobed, Mysticomenus has no prothoracic seta. The shoulders of the after-body are 

 better developed than they are in Disenochus, but the metasternum is but little longer. 



(i) Chalcomenus corruscus, Er. 



Anchometius corruscus Erichson, Acta Ac. German. 1834, xvi. Supp. p. 223. 



Niger, nitidus, supra aeneus, antennis, palpis pedibusque testaceis, his femoribus 

 (geniculis exceptis) fuscis, antennis extrorsum obscurioribus ; prothorace angusto, basi 

 recta, lateribus sinuatis, angulis posterioribus discretis, obtuse rectis, ad angulos posteriores 



