194 FAUNA HAWAIIENSIS 



and by the denser and more rugose sculpture. Apparently however it varies somewhat 

 both in the sculpture and in the form of the thorax. The sensitive seta, or its orifice of 

 insertion, is however present in all the specimens before me. The male and female are 

 extremely similar, but the former sex has, as usual, only one seta on each side of the 

 middle of the hind margin of the last ventral plate ; and the sexual clothing on the 

 under surface of the scarcely dilated front tarsus is present. 



Hab. Maui (Blackburn, Finsch, Perkins). Haleakala, 4 — 5000 ft., February to 

 May and in October. Very rare. (Perkins, Nos. 112, 413, 582, 597, 610, 680). 

 Found at Olinda both by Herr Otto Finsch and Mr Perkins, 



(2) Atracliyciicmis pcrkinsi, sp. nov. 



Niger, opacus, antennis pedibusque piceo-rufis ; thorace angulis posterioribus 

 obtusis, sculptura subobsoleta ; elytris striatis, striis vel impressionibus angustis 

 elongatis vel foveolis parvis munitis, interstitiis vix convexis. Long. 7 mm., lat. 

 elytrorum 3 mm. 



Thorax distinctly narrower behind than in front, the hind angles slightly obtuse, 

 the lateral margin fine, in front very fine ; the sculpture is somewhat coarse, but very 

 shallow, as if effaced. The elytra have rather fine striae which are here and there 

 interrupted longitudinally, or are furnished with comparatively indistinct foveoles. The 

 surface is very dull. 



Hab. Molokai : 4000 ft. June 1896. (Perkins.) 



(3) Atrachycnemis koebelei, sp. nov. 



Minus latus, niger opacus, antennis rufis, pedibus piceo-rufis ; thorace angulis 

 posterioribus obtusis, disco crebre punctato, sed baud transversim rugoso ; elytris sat 

 profunde striatis, interstitiis convexis, striis impressionibus elongatis angustis, et foveolis 

 parvis munitis. Long. 6^ mm., lat. 2^ mm. 



This is narrower than A. perkinsi, and so far as I may judge from a single 

 specimen, has a more regular punctuation than either of the other species ; the im- 

 pressions on the striae of the elytra are much smaller than they are in A. sharp! and 

 are similar to one another. The head is narrower than it is in the other two species, it 

 is dull and bears no punctures except those occupied by the sense-setae. The thorax is 

 almost destitute of sinuation at the sides behind, the hind angles are distinctly obtuse 

 and there is no sense-seta. The punctuation of the under-surface is very much reduced 

 in comparison with that of ^. s/iarpi. 



Described from a single, male, specimen for which I am indebted to Mr A. Koebele, 

 the State entomologist of the Hawaiian Islands. 



Hab. Hawaii. (A. Koebele.) 



