COLEOPTERA 483 



wards, ending in a patch on the lateral margin in front of the middle ; the rest of the 

 elytron is light, except for a dark patch at the middle of the posterior border. 



The difference between the sexes is considerable, and is parallel to that found 

 in other members of the genus. The thorax of the male is broad and very closely 

 punctured, that of the female less closely punctured, usually narrower as a whole and 

 more narrowed towards the front. 



Male pygidium rather short, very rough and coarsely punctured ; with a somewhat 

 deep, narrow notch ; the teeth on either side stout and incurved ; the margins of these 

 teeth, and the lateral margins of the last ventral segment, are serrate owing to the 

 presence of tooth-like projections, and the pubescence projects over the margins, which 

 therefore are ciliate. The supplementary segment is very slightly emarginate, with a 

 fringe of long hairs on either side of the emargination (see PI. XVI. fig. 5 : in this 

 figure the hairs are not represented). 



The female pygidium is rather short and broad, with a rounded apex. Twenty- 

 eight specimens. 



Hab. Oahu. Waianae mts., 2000 ft. &c., iv. 1892 ; "on Kukui tree"; "beaten 

 from flowers and branches and from inside fruit of isolated trees" (nos. 8, 14, 26, 

 Perkins). H. S. 



(17) Nesopeplus bidens. Sharp. 



Brachypeplits bidens Sharp, Tr. ent. Soc. London, 18S1, p. 510. 



This species was described from a single male found on flowers on Mauna Loa, 

 at 4500 feet. We now have 16 specimens. The prothorax is stated in the original 

 description to be " longer than broad," but in our specimens is distinctly broader than 

 long ; the sinuation of the lateral margins near the hind angles is extremely slight, and 

 not always present ; the punctures are fine, numerous, but somewhat obsolete ; sometimes 

 there are two very slight depressions on the posterior part of the disc. The coloration 

 is striking ; the prothorax is yellow-testaceous ; contrasted with this, the elytra are very 

 dark (though some specimens have a yellow patch near the scutellum, sometimes drawn 

 out along the inner margins), often with a distinct violet reflection ; the abdomen varies 

 from entirely yellowish to entirely dark. There is a considerable variation in size, from 

 2f to 3^ mm. in length : the females are on the whole smaller, and all our very small 

 specimens are of this sex. 



The notch in the male pygidium (PI. XIV. fig. 14/; ; the notch here appears some- 

 what too narrow) is broad and somewhat deep, the tooth on either side being narrow 

 and sharp: outline of last ventral plate shown in PI. XIV. fig. i\a: supplementary 

 segment more or less sinuate, the part on either side of the sinuation rounded and 

 bearing long hairs. Female pygidium rather narrow at the apex ; the posterior margin 

 very slightly rounded, and depressed centrally, so that in some positions it appears 

 emarginate. 



