COLEOPTERA 175 



(3) Xylcborus maiiiensis, sp. nov. 



AngListus, elongatus, cylindricus, niger, antennis pedibusque testaceis. Elytra vix 

 nitida, seriatim punctata, puncturatione minus distincta, subobsoleta, postice setis pallidis 

 pluribus vestita, parte declivi suturam juxta tuberculis 4 vel 5 minutissimis, lineariter 

 dispositis, utrinque munita, et ubique minutissime sat distincte asperula. $. Long. 



3"2— 3"5 mm. 



Closely allied to X. molokaiensis but much smaller and narrower, and with the 

 posterior declivous portion of the elytra with more numerous setae. This area has also 

 the appearance of being covered with rows of longitudinal and very minute asperities, 

 apparently due to the mode in which the punctures are impressed. The tubercles are 

 very minute, and form a row on each side near the suture, in each of which rows 3 to 5 

 tubercles can be distinguished on careful examination. The better developed ones are 

 usually those in the middle of the series. On either side exterior to these rows other 

 very obscure and minute tubercles may be sometimes distinguished. 



Hab. Maui, Haleakala (5000 ft.). On Cheirodendron. 



(4) Xyleborus hawaiiensis, sp. nov. 



Niger, antennis pedibus testaceis, haud nitidus, X. ;;/a;//r«.f?' cognatissimus. Elytra 

 opaca, subobsolete seriatim punctata, parte declivi suturam juxta tuberculis minutissimis 

 2 vel 3 lineatim utrinque armata, pilis brevioribus parum conspicue vestita, vix asperula. 

 %. Long. 3 mm. 



Apparently slightly less elongate than X. mauiensis, but extremely similar to it in 

 nearly all respects. It may be distinguished from that species by the decidedly less 

 hairy apical surface of the elytra, the hairs being less evident than those on the dorsal, 

 and the general surface of the declivous portion is moreover not distinctly covered with 

 very minute asperities. 



Hab. Hawaii, Hilo (2000 ft.) ; four examples taken. 



(5) Xyleborus trjmcatns Sharp. 



Xyleborus triincatus Sharp, Tr. Dublin .Soc. iii. 1885, p. 192. 



The elytra of this species are evidently shining, and it is smaller than any of the 

 preceding. I have seen only two examples besides the types, and they are both darker 

 than the latter, but otherwise nearly identical. 



Hab. Oahu (Blackburn). Lanai, Hawaii, in the Kona district; one from 

 each locality. 



Obs. The five species enumerated above are extremely closely allied, and almost 

 agree together in the character of the tubercles on the apical portion of the elytra, but 

 so far as I can decide on the scanty material e.xamined, the various forms are readily 



