362 Descriptive Catalogue [1898. 



Gen. ABATUS, n. gen. 



Mentum broadly sinuate, with the median part bluntly rounded, 

 and the lateral lobes not very high, but moderately sharp ; ligula 

 moderately long, sub-parallel, sinuate at tip, paraglossae much 

 longer than the ligula, very slender, disunited from the apex at 

 about two-thirds of the length and strongly arcuate at tip ; setae of 

 the ligula thick and long ; maxillae arcuate and with two long inner 

 teeth near the tip, last joint of palpi sub-fusiform not acuminate ; 

 antennae moderately long, the three basal joints glabrous, the others 

 pubescent, joint seven to tenth inclusive ovate, moniliform, joint 

 eleven one-third longer than the penultimate one, ovate and 

 acuminate ; labrum long, deeply emarginate in the centre ; man- 

 dibles long, arcuate, the right one with an inward, median tooth ; 

 head with two sulci on the anterior part ; eyes large, prominent, 

 and with two supra-orbital setae ; prothorax very little rounded 

 laterally behind, and having on each side a deep, narrow, basal 

 impression; elytra oblong, striate, without juxta-sutural stria, and 

 third interval impunctate ; legs moderately long, femora thickened, 

 tibiae not grooved and without external spine or bristle ; the three 

 basal joints of the anterior tarsi of the male are dilated in the 

 male, cordiform and squamose underneath, fourth joint short, not 

 incised. 



This genus is distinguished from Cyrtomoscelis, Catal., p. 558, by 

 the less oodiform facies, the shape of the antennae, the seven ulti- 

 mate joints of which are more ovate and moniliform, the presence 

 of an inner tooth in the right mandible, and the absence of external 

 bristles or spines on the tibiae, even in the anterior ones ; the buccal 

 organs differ also ; the ligula is more triangular, and the paraglossae 

 are fused with it to the tip, the mentum is much broader, the 

 sinuation longer and more shallow owing to the lobes being very 

 short, and the maxillae have two inner teeth at the tip, which are 

 wanting in Cyrtomoscelis. 



Abatus raffrayi. 



Black, slightly iridescent on the upper part; palpi, antennae, and 

 legs brownish red ; head smooth ; thorax smooth, straight at base 

 and apex, very slightly rounded laterally in the anterior part, a little 

 attenuate gradually from the middle to the base, where it is one- 

 fourth narrower than across the median part, posterior angle sharp, 

 disk with a narrow, median groove, base with a deep, longitudinal, 



