552 ME. H. N. RIDLEY ON THE 



^STHETUS, 11. geil. 



General cliaracters of Cyrtosoma. Mentutn small, narrowed at 

 tlie base, truncate ill frout; ligula somewhat round ; labial palj)i 

 short and stout, tbe apical joiat rather large, ovate. Labrum 

 nearly twice as broad as long, nearly straiglit iu front, the angles 

 rounded. Head transversely impressed between tlie eyes. Epi- 

 stome not separated from the forehead by a distinct line, consider- 

 ably advanced in front of tlie insertion of the antennae, obliquely 

 narrowed in front. Thorax evenly convex, the sides gently arcuate. 

 Scutellum very small, short triangular. Elytra oblong-ovate, very 

 convex, but somewhat flattened dorsally ; their epipleura very 

 broad and flat, gradually narrowed to the aj^ex of the elytra. 

 "Wings absent. Prosternal process considerably produced pos- 

 teriorly, acuminate, horizontal. Mesosternum sloping, slightly 

 concave. Metasternum very short ; intermediate and posterior 

 coxal cavities separated by a very iiarroAv space. Antenna; mo- 

 derately long and slender, the third to seventh joints elongate, 

 the apical joints a trifle broader. All the tibiae slightly curved. 



JSSTHETUS TUBEECULATUS, n. sp. 



Piceo-niger, nitidus ; capite crebre sat fortiter punctato, epi- 

 stomo convexo, subtiliter punctulato ; labro piceo-flavo ; thorace 

 creberrime punctato, latera versus tenuiter ruguloso ; elytris 

 opacis, fortiter striatis, striis impunctatis, interstitiis sat convexis, 

 siugulis serie tuberculorum minutorum instructis ; antenuis, palpis 

 tarsisque piceis, tibiarum apice intus, tarsisque aubtus fulvo- 

 pilosis. 



Long. 9-11 inillim. 



The anteuune are somewhat slender ; the second joint scarcely 

 longer than broad, the third three times as long as the second ; 

 the fourth to seventh joints elongate, each a trifle shorter and 

 broader at its apex than the previous one ; the eighth, ninth, and 

 tenth joints pilose, broader and shorter than the seventh, but 

 not transverse ; the eleventh oval. The thorax is evenly convex, 

 very gently arcuate at the base, emarginate in front, moderately 

 rounded at the sides, flnely margined all round (except at the 

 middle of the front margin), the posterior angles are vert/ slightly 

 projecting, the anterior angles slightly obtuse. The punctures on 

 the disk are close and distinct, at the base and at the sides they 

 are very fine and obscure. On each side of the disk the surface 



