1896.] 243 



pubescence, very distinct, separated from the shining black suture ; all the lateral 

 part of the elytra almost impunctate. Legs dark red, femora broadly black at the 

 tips. Hind tarsi rather densely clothed with white hairs. 



Kilauea, Hawaii ; August, 1895. A series of seventeen specimens 

 exhibiting comparatively little variation. Found on the " mokihaua" 

 tree. A single individual found on another kind of tree, " growing 

 with and resembling pua, but with lighter, smoother bark," is a well 

 marked variety, var. gracilis, of slender form, and much suffused with 

 black, and a rather greater development of the punctuation of the 

 elytra. 



I have ventured to name this species in recognition of the great 

 services the Hon. T. Bishop has rendered to Natural History, and the 

 generous aid he has afforded to the Committee for investigating the 

 fauna of the Hawaiian Islands. 



Plagithmysus vicinus, n. sp. 



Niger, antennarum basi, pedibus elytrisque rufis, femoribus ad apicem 

 nigris, tibiis nigricantibus ; thorace vittis quatuor albidis ; elytro singulo 

 linea lata pubescente pallida, lineis his anterius furcani formantibus,furca 

 hac cum tomento nigra repleta. Long., 15 — 17 mm. 



This interesting form is perhaps only a subspecies of P. Bisliopi ; 

 nevertheless, the series of ten examples exhibits distinctions by which 

 the two are readily separated, one of them being that the antennae 

 are blacker but the femora less black than they are in P. Bisliopi. A 

 marked difference exists in the broader line of pale pubescence on the 

 elytron of P. viciniis ; the thorax has the median elevation broader, 

 and its posterior part more scabious. 



Ten specimens from the western side of Mauna Loa, 3000 ft., in 

 Hawaii, October, 1892. 



Plagithmtsus bilineatus, n. sp. 



Brunneo-rufus, plus minusve nigro-tinctus, thorace vittis quatuor albidis, 

 vittis externis obsoletescentibus ; elytris undique crebre punctatis, singulo linea 

 albida, anterius abrupte angulatim versus latus divergente ; femoribus minus 

 crassis, tarsis posterioribus parcius albido-vestitis. Long., 11 — 20 mm. 



Of a very dark sanguineous red colour, suffused with black to a variable extent, 

 sometimes the posterior portions of the elytra are entirely black, and the under- 

 surface may be black. The posterior hump of the pronotum has no transverse lines 

 on it ; the outer of the two pairs of thoracic vittse is very distinct, the flanks of the 

 prothorax are densely punctate, except for a bare shining space on the middle just 

 below the outer vitta. The elytra are broad at the base and greatly narrowed 

 behind ; the pair of white lines on them is very distinct, and each is abruptly 



