176 FAUNA HAWAIIENSIS 



distinguished by the characters given. It may be noted that four of the species 

 apparently are Hmited in range to one or other of the islands, while the fifth has been 

 taken on three different islands. Of this group of species I have further seen three 

 examples, which appear to belong to none of the forms described above, nor yet do they 

 agree together themselves, but the material is quite insufficient for deciding as to the 

 specific value of the characters they exhibit. 



(6) Xyleborus obliquus Sharp. 



Xyleborus obliquus Sharp, Tr. Dublin Soc. iii. 18S5, p. 192. 



Hab. Oahu and Hawaii (Blackburn) ; I have not met with this species. 



(7) Xyleborus lanaiensis, sp. nov. 



Nigricans, parum nitidus, elongatus, cylindricus, antennis pedibusque testaceis. 

 Elytra subtiliter minus distincte punctata, postice sat abrupte declivia, parte declivi 

 utrinque suturam juxta tuberculis 2 fortioribus lineatim munita, et subdepressa. $. 

 Long. 3 "6 mm. 



Readily known from any of the preceding by the stronger development of the four 

 tubercles of the posterior declivous portion of the elytra, these tubercles being placed 

 two in a line on each side of and near to the suture, the upper pair near the com- 

 mencement of the declivity, the others near the apex. From the base of each pos- 

 teriorly springs a long fine seta, directed downwards and backwards. Outwardly to 

 these larger tubercles there are on each wing-case one or two considerably smaller 

 ones. 



Hab. Lanai 2000 ft., January 1894. Three or four examples taken. 



(8) Xyleborus similliimis, sp. nov. 



Praecedenti (X. lanaiensi) simillimus et cognatissimus, parte declivi elytrorum 

 eodem modo armata. Elytra subnitida, distinctius et minus subtiliter punctata, tuber- 

 culis 2 superioribus setas breviores ferentibus. ?. Long. 3 '4 mm. 



Extremely like X. Ianaie7isis, but the elytra are somewhat striate, and the punctures 

 are decidedly larger and more distinct, the surface somewhat shining. Apical armature 

 much as in X. lanaiensls, the four larger tubercles being well-developed and there are a 

 minute pair anterior to the upper pair of these, but these may be more or less evident 

 in the preceding species also. The setae which spring from the base of the anterior 

 pair of the larger tubercles are evidently less developed than those in the same position 

 on X. lanaiensis. 



Hab. Hawaii, above Hilo (1800 ft.); two examples taken. 



