COLEOPTERA 179 



(16) Xyleborus exsectus, sp. nov. 



Nigricans, elytrorum basi nonnunquam rufescente, pedibus antennisque rufes- 

 centibus vel testaceis. Pronotum suboblongum, antice sat profunde excisum, et in 

 processum latum, cujus apex truncatus, productum, lateribus pilis vestitis. Elytra 

 leviter striata, striis subtiliter punctatis, setis parce vestita, parte declivi baud tuber- 

 culata. 1^. Long. 3 '2 mm. 



Hab. Maui. Three examples taken on Haleakala (5000 ft.). One of these is of 

 a testaceous colour and is no doubt immature. 



( I 7) Xyleborus viilcanus, sp. nov. 



$ nigricans, elytris thoracisque basi subpiceis, pedibus testaceis, oblongus. Pro- 

 notum parum distincte sculpturatum, elytris vix latius, lateribus parallelis, setis elongatis 

 aureis parce vestitis, anterius excisum, et in processum triangularem productum. Elytra 

 sat elongata, rugulosa, vix evidenter punctata, parte declivi tuberculo minutissimo 

 suturam versus utrinque munita. $. Long. 2'5 mm. 



Much smaller than the preceding species, and very distinct by the pointed process 

 of the pronotum. The posterior declivous portion of the elytra is somewhat abrupt, 

 and on its upper portion on either side of the suture an excessively minute tubercle can 

 be seen, each of which is furnished with a longish seta at its base, while some even 

 more minute and hardly visible tubercles are placed in a transverse line with these. 



Hab. Hawaii. A single example taken at Kilauea. 



(iS) Xyleborus littoralis, sp. nov. 



$ castaneus, pronoto plus minus nigricante, pedibus testaceis, oblongus. Species 

 prima facie X. vtilcano simillima, sed major, et minus angusta, pronoto antice fere 

 similariter producto. Elytra substriata, grossius distincte seriatim punctata, parte 

 declivi juxta suturam utrinque tuberculis minutissimis 2 vel 3 lineariter dispositis, 

 aliisque paucis vel minutioribus et obscuris, munita. Z- Long. 3 mm. 



Easily distinguished from A', viilcaims by the substriate and somewhat coarsely 

 punctured elytra, and the more numerous and rather more developed tubercles of the 

 posterior truncation. These tubercles form two series on each side, those nearest the 

 suture, though very minute, being fairly distinct, those external and subparallel to these 

 are very minute and obscure. 



Hab. a single example taken at sea level on Molokai, July 1893. 

 F. H. II. 24 



