COLEOPTERA 533 



characteristics of A. politits Leconte and A. brevist emits de Marseul, as described b)' 

 Horn (P. Amer. Phil. Soc. \in. 1873, p. 356), appear to be combined in it. As in 

 A. politiis, the mesosternum (PI. X\^ fig. 30) has a longitudinal impression or furrow- 

 extending on to the front part of the metasternum ; a form of impression not yet found 

 in any other Hawaiian Acritits, for in all other cases the impression has a wide, roughly 

 triangular form, and is almost confined to the mesosternum. The presternum is more 

 like that oi A. brevisternus, the keel (PI. XV. fig. 31) being only \^ times as long as the 

 breadth in the narrowest part, and with a broad base. There is however no transverse 

 row of punctures between meso- and metasterna as in A. brevisterniis. In the form of 

 the prosternum the species is like A. subrotundus, but is easily distinguished by larger 

 size, less round form, by the mesosternal furrow, and the diverging striae on meta- 

 sternum and first abdominal segment not being obliterated posteriorly. 



We have only one specimen. Wings not reduced. 



Hab. Kauai, Halemanu, 4000 ft. v. 1895 ("O- 504- Perkins). 



{l-^) Acritiis parvitliis, sp. nov. 



Fortiter nitidus, nigricans, parum depressus ; prothorace elytrisque subtilissime ac 

 obsolete punctulatis ; prosterno longiore eo A. siibrotundi : metasterno et mesosterno 

 convexo, hoc nullo modo impresso. Long, circa | mm. 



This species, with A. subrotundiis and A. flavitarsis, is of the smallest size found 

 in the genus. Dorsally it is very slightly depressed, and the punctuation appears as 

 numerous exceedingly fine inequalities of the surface. 



In form it is more oblong than A. siibfotundits, but not so narrow as A. flavitarsis. 

 The prosternum (PI. XV. fig. 32) in length is intermediate between the very short form 

 found e.g. in A. siibrotiiiidiis, and the longer form found in A. longipes : in general 

 shape it is saddle-like, forming an arch transversely, and with the lateral parts having 

 rather concave-curved surfaces longitudinally ; the striae diverge considerably in tront ; 

 in one specimen they are obliterated near the anterior margin. The species agrees 

 with A. snbi'ohindus in having the mesosternum convex, but is at once distinguished 

 from it by the diverging striae not being obliterated posteriorly. The meso- and 

 metasterna bear excessively minute punctures, only visible under a high power ; suture 

 between them visible. Three specimens. Wings not reduced, examined in all three 

 specimens. 



Hab. Lanai, 2000 and 3000 ft. (nos. 92, 93, Perkins). 



(34) Acritits siibroliiitdiis, sp. nov. 



Ovalis, convexus, niger, fortiter nitidus, impunctatus ; pedibus hand longis ; pro- 

 sterno curto, basi conspicue lato ; infra fortiter convexus, mesosterno nullo modo impresso. 

 Long, circa f mm. 



Plate XV. fig. 33. 



