178 FAUNA HAWAIIENSIS 



(12) Xyleborus rugatus Blackb. 



Xyleborus 7'ugatus Blackburn, Tr. Dublin Soc. iii. (1885), p. 192. 

 Hab. Oahu. A single specimen taken. (Blackburn.) 



(13) Xyleborus frigidus Blackb. 



Xyleborus frigidus Blackburn, Tr. Dublin Soc. iii. 1885, p. 193. 



Hab. Maui. A single specimen taken on Haleakala, 4000 ft. (Blackburn.) 



(14) Xyleborus ininiaturus Blackb. 



Xyleborus immaturus Blackburn, Tr. Dublin Soc. in. 1885, p. 193. 



I have taken what is probably the t of this insect. It is testaceous or rufotesta- 

 ceous in colour, but otherwise bears no resemblance to the $. Form short and robust, 

 the whole insect hardly twice as long as wide, longitudinally convex. Thorax very 

 narrowly rounded, or somewhat pointed, in front, of ovate form, truncate at the base. 

 The sculpture is very feeble, and there is none of the coarse rugosity in front such as is 

 seen in the $, and the clothing there consists of shortish and inconspicuous hairs. 

 Elytra short, rather longer than wide in dorsal aspect, rather distinctly substriate, the 

 striae finely punctured. There are no evident tubercles on their posterior portion. 

 Length hardly 2 mm. 



Hab. Oahu and Hawaii (Blackburn) ; Hawaii in various localities. 



(15) Xyleborus agaiiius, sp. nov. 



$ castaneus, parum elongatus, tibiis omnibus plus minus obscuratis, tarsis pallidis. 

 Pronotum magnum, antice acuminatum, ruguloso-punctatum, anterius et latera versus 

 pilis longis vestitum, lateribus sat fortiter rotundatis. Elytra parce pilosa, desuper 

 visa longiora quam latiora, haudquaquam striata, obscure confuse punctata, lateribus 

 subcompressis. $. Long. 2 mm. 



The form of the thorax is much like that of the $ assigned to X. immattirus, but 

 its sculpture and clothing are very different, as also is the colour of the entire insect. 

 The elytra are different in form and sculpture, having no trace of striation, and the 

 punctures are very feeble and indistinct. 



Hab. Lanai. Two examples were taken at an elevation of 3000 ft. in Jan. 1894. 



