52 Mr. D. Sharp on some 



quite so invisible as that of the thorax. Hind body- 

 rather elongate, a little dilated from the base to near the 

 apex. Legs clear yellow. 



Common in Oahvi. I believe it to be an introduced 

 species ; I have, indeed, an extremely closely-allied species 

 in my collection from Brazil. 



Trogophl(Bus fontinalis, n. sp. Capite abdomineque 

 nigricantibus, thorace elytrisque sanguineo-obscuns, an- 

 tennis rufis, basi dilutiore, pedibus testaceis, angustulus, 

 sat elongatus, dense subtilissimeque punctatus, subopacus, 

 prothorace dorso obsolete bi-impresso, lateribus rotundatis, 

 basin versus angustatis. Long. 2^ mm. 



Similar in size and form to T. elongatulus, Er. An- 

 tennas moderately long, distinctly thickened towards the 

 apex, but scarcely clavate, the three terminal joints are 

 liowever perceptibly broader than the preceding ones, 

 the 10th joint scarcely shorter than long. Head rather 

 narrower than the thorax, black. Thorax narrower than 

 the elytra, rather broader than long, truncate in front, 

 without distinct angles, the greatest width is much in 

 front of the middle, and thence it is a good deal narrowed 

 towards the base, the surface is dull and is excessively 

 finely and densely punctured, and excessively indistinctly 

 bi-impressed. Elytra a little longer than the thorax, 

 and of a red colour a little clearer than it, very densely 

 and finely punctured. Hind body rather elongate and 

 narrow, a little dilated from the base to near the apex, 

 densely and finely punctured, but a little shining. Legs 

 yellow. 



Found on the margin of running water in the mountains 

 of Oahu. 



TrogojMaus abdominalis, n. sp. Similis T. exigui, 

 Er., sed major et magis elongatus ; niger, opacus, densis- 

 sime subtilissimeque punctatus, subopacus ; antennarum 

 basi, pedibusque sordide testaceis. Long. 2^ mm. 



Antennae moderately long and stout, Avith the three 

 apical joints a little thicker than the others, the 9tli and 

 lOtli rather transverse. Head rather narrow but nearly 

 as broad as the thorax. Thorax a good deal narrower 

 than the elytra, as long as broad, the front angles very 

 indistinct and depressed, transversely convex, the greatest 

 width in front of the middle, thence a good deal narrowed 

 to the base, the surface with excessively dense and fine. 



