5i6 FAUNA HAUAIIENSIS 



Section II. Scutellum invisibk-. 



(2) Acritiis minor, sp. nov. 



Piceo-testaceus, nitidus, oblongo-ovalis ; capitc parce punctato, sutura transversa 

 ante antennis distincta; prothorace crebre punctato; elytris crebre (et obsolete aciculatim) 

 punctatis, ad humeros et ad apices laevig^atis; prosterno lonyo: in medio conspicue 

 elevato, striis antice late divergentibus; mesosterno vage impresso, hoc et metasterno et 

 segmento abdominis primo crebre sed baud dense punctatis. Long. i\ mm. 



The distinctive feature in the two Kauai specimens from which the description is 

 taken lies in the form of the keel of the [jrosternum. This is more than twice as long 

 as the breadth between the striae at the base; the base is rather narrow, the striae 

 diverge very widely in front, and the surface between them in the front part is raised 

 into a conspicuous elevation or blunt tubercle (PI. XV. figs. 1 and 2). The prothorax 

 has numerous punctures ; in one specimen they are larger and a little rugulose in the 

 median basal area, forming an approach to a definite basal sculpture. Elytra numerously 

 punctured, becoming smooth and impunctate towards the apices and towards the 

 shoulders ; their surface between the punctures shows vague wrinkles and inequalities. 

 Punctures on the mesosternum, &c., well-marked but not very close. 



There is a specimen from Hawaii with the elevation on the [jrosternum, which 

 cannot lie separated from the Kauai specimens. Also two other specimens, one from 

 Kauai and one from Hawaii, agreeing in all points with A. 11111107' except in the form of 

 the prosternum. The keel lacks the elevation, and the striae, though divergent in front, 

 are less widely divergent. The relation of these to the typical specimens must remain 

 uncertain. I have not been able to see the wings in any specimens except one of these 

 doubtful examples; in which they are not reduced. 



Hai;. Kauai, Hawaii. — Kauai: Halemanu, 4000 ft.; high plateau (nos. 504, 631, 

 6S2). — Hawaii: Kona, 3000 ft. — (Perkins.) 



(3) Acritus oriiatns, s[). now 



Oblongo-ovalis, convexus, nitidus, piceus, pedibus piceo-ferrugineis; ca[)ite laevi, 

 parce et subtiliter punctato, sutura transversa ante antennis distincta; prothorace fortiter 

 ac dense aciculatim punctato; elytris dense strigoso-rugosis ; [jrosterno striis antice late 

 divergentibus, in medio antice parum elevato; mesosterno vix impresso, hoc et metasterno 

 crebre pimctatis. Long. It^ mm. 



Plate X\'. fig. 3. 



This species is by the form of its prosternum closely allied to x4. minor, but very 

 much larger, and in its dorsal sculpture (juite distinct from ./. minor or any other 

 Hawaiian Acritus. The keel of the ])rosternum is about twice as long as the breatlth 

 in its narrowest part; the striae curve outwards so widely in front, that the front margin 



