526 FAUNA HAWAIIENSIS 



Agrees in colour, shape, size, and in the character of its surface, with the type ; 

 basal thoracic sculpture also similar. The prothoracic punctures are stronger. The 

 elytra bear numerous aciculate punctures not confined to a small area, extending over 

 the disc. Meso- and metasterna fairly strongly punctured. The prosternum too is 

 distinctly punctured ; its keel is concave between the striae as in the type, but is 

 narrower, being more nearl)- three times as long as broad. 



Though this form is in many respects distinctly different from the type, it appears 

 better not to make it a distinct species, as the two forms have many important points in 

 common, especially the conca\e prosternal keel. They are from the same locality. 

 There exists always the possibility of differences being sexual. Wings not examined. 

 Three specimens. 



Hab. Lanai; about 2000 ft. (nos. 84, 91, 92, Perkins). 



(19) Acrifiis nepos, sp. nov. 



Oblongo-ovalis, piceus, nitidus; prothorace subtiliter nee dense punctato, ante basin 

 in medio rugoso, linea transversa impressa parum arcuata ; elytris suturam versus 

 punctatis (interdum parum aciculatim), punctis ad latera et ad apices late obsoletis ; 

 prosterno sat longo et angusto, mesosterno impresso et rugose punctato, metasterno 

 subtiliter punctato. Long. 1 — \^^ mm. 



This is a less oblong and depressed form than A. cut ret us. The chief distinction 

 lies in the sculpture of the elytra, the punctuation of which is confined to the region 

 near the suture, and becomes obsolete over a considerable part of the disc towards the 

 sides, and towards the apices. In many respects this species is like A. lanaiensis, but 

 is more shining, and has the prosternum of different form. The keel of the latter is 

 rather long and narrow (a little over twice as long as the breadth in the middle), but 

 the surface is not concave, but slightly convex. 



The five specimens show considerable variation, but it is not possible to separate 

 them. There are two large ones from Makaweli (Kauai), one of which has the elytra 

 more strongly punctured, and the punctures more aciculate, than the rest: this specimen 

 also shows a number of very fine longitudinal scratches or striae on the back part of the 

 mesosternal impression and front part of the metasternum. The other large specimen 

 has the punctuated part of the elytra reduced to a very small area, the remainder being 

 quite smooth. The three remaining specimens are very much smaller : one is irom 

 Waimea (Kauai), the other two from Oahu. Wings not reduced. 



Hab. Kauai, Oahu. — Kauai ; Makaweli, 2500 ft. (no. -joi) ; Waimea, 4000 ft. — ■ 

 Oahu ; Waianae mts. (no. 4). — (Perkins.) 



