COLEOPTERA 



107 



(9) Plagithmysus pulverulenhis Motsch. 



Stenopterus pidverulentus Motsch., Bull. Mosc. 1895, i. p. 85, PI. I. f. 12. 

 Plagithmysiis pulveridentus Motsch., Bull. Mosc. 1845, 11. p. 41, PI. VI. f. 7 ; 



Sharp, Ent. Mo. Mag. xxxii. 1896, p. 242. 

 Clytarlus rohistus Sharp, Tr. ent. Soc. 1878, p. 206. 



Hab. Oahu, both ranges ; on Acacia falcata. Blackburn (erroneously) ; Perkins, 

 on A. koa. 



(lo) Plagithviysus diana, sp. nov. 



Nigerrimus, dense regulariter griseo-ornatus : thorace subgloboso, griseo, nigro 

 trivittato : elytris griseis, areis denudatis nigris, ad suturam lineis latis discretis ante 

 medium leniter divergentibus pallide pubescentibus, ante lineas has plaga angulariter 

 nigro-pubescente. Long, i 3 millim. 



(Plate VI. fig. II.) 



An extremely distinct, beautifully, though soberly, ornamented species, with the 

 sides of the thorax more strongl)- rounded than they are in any other species of the 

 genus. There is a slight longitudinal carination of the middle of the thorax. The legs 

 are entirely black even at the base, the posterior are elongate, but less incrassate than 

 in most other species. The sexes appear to be very similar. 



Hab. Kauai, 4000ft., July, 1896. Eight examples; on Pelea sp. 



(11) Plagithmysus collaris, sp. nov. 



Niger, elytris, antennis pedibusque rufo-obscuris, his femoribus extrorsum tibiisque 

 plus minus nigricantibus ; pube pallide sulphurea ornatus ; elytris densissime punctatis, 

 singulo linea pubescente pallida anterius versus latus divergente, ante lineas plaga 

 nigro-velutina, basi rugosa, parcissime sulphureo-pubescente. Long. 8^ — 16 millim. 

 Mas, prothorace ad latera densissime punctato. Fem., prothorace ad latera plus minus 

 late laevigato. 



(Plate VI. fig. 13; Z.) 



This is a very distinct species, somewhat similar to P. bishop i and P. vicinus. 

 There are no definite thoracic stripes, but the thorax is broadly cristate and scabrous 

 along the middle, and there are distinct lateral elevations ; it is a good deal constricted 

 at the base. The elytra are dark red, and remarkable on account of their dense 

 punctuation. 



Hah. Maui; Haleakala. The larva of this species was found in October, 1S96, 

 feeding- in the wood of Pelea sp. ; by carrying this wood to Honolulu Mr Perkins 

 obtained a series of 20 specimens in the following December. 



F. H. II. IS 



