244 [Nijveniber, 



angularly turned outwards in front of the middle, but does not become broader ; 

 there are also several patclies of scanty white hair at the base, and the pair of these 

 behind the scutellum may, in perfectly fresh specimens, extend so far back as to 

 almost reach the spot where the main lines commence to diverge. The femora are 

 rather slender, gradually broader from the base to near the tip, and are more or less 

 tinted with black at the tips ; the tibise are black, and the tarsi are only scantily 

 clothed with white hairs. The abdomen is polished, and has a line of white pubes- 

 cence on each side ; the breast is spotted at the side with white in front and behind. 

 The sexes are extremely similar, except that the terminal joints of the antennse are 

 considerably longer in the male. 



Kilauea, Hawaii ; September, 1895. A good series'. 



The insect lives on the Ohia lehua tree (Metrosideros). 



Plagithmysus lanaiensis, n. sp. 



Nigro-rufns ; thorace vix discrete vittato ; elytris densissime punotatis, 

 singulo linea albida anterius angulativi versus latiis divergente. 



Long., 12 m7n. 



Thorax very dark red, with the pubescence of the longitudinal spaces so short 

 and minute that it scarcely forms vittse ; the posterior hump bearing two strongly 

 marked transverse lines ; the lower parts of the flanks but little punctured. Elytra 

 flat above, broad at the shoulders and much narrowed behind, remarkably densely 

 punctured, black-red, at the sides red, and also obscurely red at the base ; the line 

 of white pubescence on each narrow and very definite, its prolongation in front of 

 the angle longer than usual, abdomen shining. 



The single specimen we have received of this species is doubtless 

 distinct from P. hilineatus, the only species it at all closely resembles, 

 its excessively dense punctuation and the very minute white hairs that 

 ornament it being conspicuous points of distinction ; besides this it is 

 different in form, and the two scabrous lines of the posterior thoracic 

 prominence are very distinct, The individual is no doubt a male, 

 though the terminal joints of the antennae are shorter than they are 

 in that sex of P. hilineatus. 



Halepaakai, Lanai, 3000 ft. July, 1894. 



Plagithmysus Perkinsi, n. sp. 



Mojor, griseo-pubescens, nigro-rufus, elytris ex parte majore nigris, basi 

 lateribusque rufescentibus, densissime punctatis, singulo linea ochracea anterius 

 grassiore et versus latus leniter curvativi divergente ; corpore subttis cum abdo- 

 mine pubescente et punctata. Long., 22 — 28 mm. 



Thorax with the central crest very broad, strongly elevated and very scabrous 

 along the summit, its front part projecting forwards as well as upwards in a tubercle- 

 like shape ; the pubescence does not form vittse. Elytra very long, transversely 

 •fonvex, very densely punctured ; the line of pallid pubescence on each very distinct, 



