342 MR. J. BALT ON NEW SPECIES 



rounded, the apex acute ; upper surface finely punctured, nar- 

 rowly edged with nigro-piceous. Elytra scarcely broader than 

 the thorax, subquadrate-oblong ; sides parallel in the c? , rather 

 more attenuated towards the apex in the $ , subcylindrical, rugu- 

 lose, finely punctured, rather closely covered with pale adpressed 

 hairs. Thighs stained above with nigro-piceous. 



Closely allied to M. luctuosa ; shorter and more robust, paler in 

 colour, the antennae shorter in the male and more broadly dilated, 

 the elytra more densely pubescent. 



Genus Diaspis, Lacord. 

 DiASPis BATESI, n. sp. Subquadrata, obscure cuprea olivaceo tincta, 

 granulosa, subopaca, antennis obscure rufis, extrorsum piceis ; thorace 

 crebre punctate, dorso valde gibboso, gibbere antice declivi, apice pro- 

 funda longitudinaliter inciso ; elytris profunde rugoso-punctatis, utrin- 

 que costa elevata bicurvata a callo humerali ad suturam oblique 

 ducta tuberculisque sex (duobus ante cseteris infra, medium positis) 

 instructis ; pygydio longitudinaliter tricarinato. Long. 2^ lin. 



Sab. Ega, Upper Amazons. Collected by Mr. Bates. 



Head granulose, the vertex closely, the front more distantly im- 

 pressed with round punctures ; clypeus rugulose ; labrum rufo- 

 piceous ; five lower joints of antennae obscure rufous, the six 

 outer joints thickened, slightly compressed and forming an elon- 

 gated piceous club. Thorax granulose-strigose, closely covered 

 with round punctures, sides less closely punctured, hinder por- 

 tion of disk with a strongly raised gibbosity, the anterior sur- 

 face of which is very oblique ; its apex is divided by a broad, deep, 

 longitudinal incision into two strong, longitudinally compressed 

 protuberances, the apices of which are produced slightly back- 

 wards. Elytra slightly attenuated towards the apex, the latter 

 truncate; each elytron with an oblique, bicurvate, strongly 

 raised carina, which extends from just within the apex of the 

 strongly raised humeral callus nearly to the middle of the suture ; 

 in addition, six elevated tubercles are arranged as follows : — 

 two before the middle (one at the base, halfway between the 

 suture and the humeral callus, the other small, close to the 

 suture, about halfway between the basal margin and the oblique 

 ridge); four others below the oblique ridge, namely: — the 

 first near the suture, longitudinally compressed, and forming a 

 strongly raised elongate tuberosity ; the second and third on the 

 middle disk, much less distinct ; lastly, the fourth subapical, 

 transversely compressed and much more strongly raised than the 



