COLEOPTERA 



(9) Xyleborus oahuensis, sp. nov. 



^n 



Nigricans, antennis pedibusque testaceis, spp. duabus praecedentibus simillimus, 

 sed paullo major. Elytra subtilissime sed subdistincte punctata, subnitida, parte declivi 

 depressiuscula, tuberculis 6 sat distinctis, setas longas ferentibus, armata, horum 4 

 anterioribus curvatim dispositis. %. Long, vix 4 mm. 



Very like the preceding two species, having four well-developed tubercles similarly 

 disposed on the posterior portion of the elytra, two in a line on one side and two so 

 placed on the other side of and near to the suture. Behind the anterior tubercles on 

 either wing-case towards the side there is another distinct tubercle, these two and the 

 anterior pair being placed in a curve. These sublateral tubercles are well-developed 

 but smaller than the anterior and about equal to the posterior pair in size. From the 

 base of each of the tubercles posteriorly a long fine seta rises. There are no evident 

 smaller tubercles in this species. 



Hab. Oahu. A single e.xample was taken in the northern part of the Koolau 

 rang-e, at an elevation of about 1000 ft. 



&^ 



(10) Xyleborus ditbiosus, sp. nov. 



Castaneus, subnitidus, pedibus antennisque testaceis. Elytra subtilissime seriatim 

 punctata, parte declivi minus abrupta, tuberculis 2 minus fortibus lineariter dispositis 

 utrinque juxta suturam armata, necnon latera versus utrinque tuberculis aliis minutioribus 

 2 vel 3 lineariter dispositis munita, setis brevioribus. %. Long. 3 "5 mm. 



The single example above characterized is a very obscure species. The four larger 

 tubercles of the posterior declivous portion of the elytra are less strong than those of 

 the several preceding species, yet more so than those of the series ending with 

 X. truncaius. In front of the anterior pair of these there is a third pair smaller and ill- 

 developed, and in a line with the others. They are situated close to the suture just at 

 the beginning of the posterior declivity, and in the unique example are placed quite 

 obliquely and not opposite the one to the other. Besides this series there is a second 

 one of about three minute tubercles on each wing-case towards the side. 



Hab. Maui. A single example was taken in the lao valley in 1894. 



(11) Xyieboriis confustis Eichhoff. 



Xyleborus confusus Eichhoff, Ratio, Descr. emend. Tomicinorum (1S79). 



Xyleborus insularis Sharp, Tr. Dublin Soc. iii. 1885, p. 193. 



Hab. Oahu and Kauai (Blackburn) ; Oahu (both ranges), Maui, Kauai, Hawaii. 

 At elevations from 1500 — 4000 ft. above sea-level. We are indebted to Mr W. F. H. 

 Blandford for the identification of this species. 



