252 



armed, and no spine between middle coxae; on the western 

 specimens the metasternum is more strongly ridged along the 

 middle, but the ridge is more rounded, commences at the 

 base with a spine between the middle legs, and its greatest 

 elevation is hardly spinose and more distant from the 

 abdomen. From curvicornis it differs in being larger, 

 antennae of both sexes circular in cross-section throughout 

 (on curvicornis in places the antennae are distinctly wider 

 than deep), metasternum and legs very different, oral bristle 

 less conspicuous, etc. Some parts are slightly paler than 

 others, but there are no sharply defined differences. The 

 abdominal fascicles are distinct, but smaller and less con- 

 spicuously golden than usual ; the under-surface of the 

 abdomen of the male (viewed from the sides) appears to have 

 a few short erect spines, but these are really due to a slight 

 congestion of short setae; the projection from the mouth is 

 very short. The median line of the head is conspicuous from 

 some directions. The front tibiae of the male, from a few 

 directions, appear to have a pale membranous fringe at the 

 inner apex, conspicuously increasing the apparent width. 

 Both sexes have distinctly granulate antennae. 



Articerus sulciventris, n. sp. 



(3 . Reddish-castaneous ; some parts slightly darker 

 than others. Clothed with very short pubescence, more con- 

 spicuous at apex of elytra than elsewhere, upper-surface of 

 abdomen almost glabrous, except for a few short setae, and 

 for a rather elongate fascicle of short clothing on each side 

 of the base; under-surface rather indistinctly clothed, except 

 for a distinct line along middle of metasternum. 



Head unusually short and without a median line; 

 punctures dense and rather coarse. Antennae short, scarcely 

 longer than greatest width of head, moderately wide, lightly 

 curved, basal half somewhat flattened, about apex briefly 

 elliptic in cross-section. Prothorax distinctly transverse, 

 widest near apex, front angles not completely rounded off ; 

 with a large, round, deep, medio-basal fovea; punctures 

 (except in middle of apex, where they are smaller) much as 

 on head. Elytra moderately dilated posteriorly, subsutural 

 striae lightly defined; with rather dense and small, but dis- 

 tinct punctures, becoming crowded at base. Upper-surface 

 of abdomen with a wide, deep excavation, not encroaching 

 upon middle of convex median portion ; under-surface with 

 a rather narrow groove from base to beyond the middle. 

 Metasternum sloping from base to beyond middle, where the 

 slope terminates in a short acute spine, beyond this some- 

 what widely flattened or gently concave. Front and hind 



