590 Coleopterological Notices, IV. 



versely oval, deep, polished and glabrous subapical pit, separated 

 from the lateral constriction by obtuse elevations. Length 3.5 mm. ; 

 width 1.65 mm. 



Arizona (Santa Rita Mts.). Mr. Wickham. The single repre- 

 sentative before me is a female ; I have not seen the male. The 

 remarkable form of the mandibles and the robust excavated tarsal 

 claws, may ultimately necessitate the generic separation of this 

 species, for which Mr. Pascoe has already suggested a name. 



The spots of the elytra appear to be denuded, but, as in all similar 

 cases in this genus, these areas are not really denuded but quite as 

 densely clothed with blackish and sometimes more slender squam- 

 ules. 



V. 



17 CentrillMS acuminatum n. sp. — Narrowly rhomboidal, black, 

 the antennae rufo-piceous with the club paler and brown ; lustre dull, the 

 sculpture dense but not very deep ; vestiture pure white, consisting of broad, 

 extremely dense scales beneath and of longer, sparser, evenly distributed 

 squamules above, not entirely concealing the surface ; those of the pronotum 

 directed transversely, those of the elytral intervals not arranged in lines. 

 Head finely, sparsely punctate, with a squamose area above each eye, the 

 transverse impression well marked ; beak in the male distinctly robust toward 

 base, strongly tapering thence to the apex and scarcely longer than the head 

 and prothorax, in the female distinctly longer and much more slender, strongly 

 arcuate, densely, deeply sculptured, squamose, the antennae inserted just 

 behind the middle, the scape moderate, rather abruptly clavate, the funicle 

 very long, slender, bristling with an irregular fringe of long flexible white 

 setae along its internal side, the second joint very slender, scarcely more than 

 one-half as long as the first and barely one-half longer than the third, two to 

 four decreasing in length, outer joints not at all transverse, the club aberrant, 

 slender, more than twice as long as wide, about as long as the preceding four 

 joints combined, abrupt, densely pubescent, with the annulations very dis- 

 tinct, almost articulate, and with the two basal joints together occupying 

 scarcely more than one-half of the length. Prothorax one-half wider than 

 long, the sides broadly, feebly arcuate, gradually convergent and sinuate 

 anteriorly, becoming nearly parallel toward base ; apex distinctly less than 

 one-half as wide as the base, the latter transverse, with the median lobe small 

 but distinct ; disk rather coarsely but not very deeply punctate, without 

 median line, the punctures extremely densely, polygonally crowded, forming 

 almost even hexagons at some points. Scutellum moderate, very densely 

 squamose, subquadrate. Elytra about one third longer than wide, nearly 

 twice as long as the prothorax, and at base, rather abruptly, distinctly wider 

 than the latter, the humeri small but prominent, the sides rapidly convergent 

 thence to the apex and feebly arcuate, the apex very narrowly rounded ; disk 

 deeply but not coarsely striate, the intervals three or four times as wide as 



