194 CEUAMBYCIDjE. 



t 



narrowed from the fourth joint up to the apex. The acetabula of 

 the front coxse are open posteriorly. 



210. Niraeus tricolor, Newman, Mag. Nat. Hist, iv, p. 194 (1840). 



Euchroa dimidiata, Guer. Deless. Souv. d'un Voy. ii, p. 57, pi. 14, 

 fig. 1 (1843). 



Head above and more or less in front, prothorax, and a broad 

 band passing along the side of each elytron for a short distance 

 from the base and then turned towards the suture, testaceous 

 red ; this band subnitid, strongly and densely punctured ; the 

 rest of the elytra bluish black, densely and finely punctulate, 

 covered with dark tomentum ; antennae bluish black, with joints 

 third to sixth pale yellow, subnitid ; breast and abdomen steel- 

 blue ; legs dark blue. Head densely and rather strongly 

 punctured, impressed with a median line which does not 

 extend on to the vertex or clypeus ; a transverse line separates 

 the front and clypeus, the latter inclined forwards at an angle 

 with the front. Prothorax densely punctured, its front margin 

 rounded in the middle, the anterior and posterior transverse 

 grooves rather shallow, the disc slightly raised on each side just 

 in front of the posterior groove. Elytra gradually narrowed pos- 

 teriorly, rounded at the apex. Body beneath faintly covered 

 with silky greyish pubescence. Femora densely punctured, the 

 punctures unequal in size ; hind femora not reaching quite to the 

 apex of the elytra in the male. Fifth ventral segment of male 

 sinuate at the apex, the sixth slightly notched at the apex, 

 impressed with a line along the middle. 



Length 27-32 ; breadth 8-9 ram. 



Hab. Tenasserim ; Penang (?). 



Genus PACHYTERIA. 



Pachyteria, Serville, Ann. Soc. Ent. Fr. ii, p. 553 (1833) ; Lacord. 

 Gen. Coleopt. ix, p. 10 (1869). 



Type, P. fasciata, Fab. 



Range. Oriental Eegion. 



Head narrowed and more or less elongated below the eyes ; 

 raised so as to form a ridge, concave from side to side, between 

 the antennae ; front oblique, the clypeus prolonged in front, ends 

 in a narrow membranous epistome ; mandibles narrowed down- 

 wards, obliquely inclined towards one another and abruptly 

 incurved at the apex. Antennae thick, about equal in length to 

 the body in the $ , shorter in the $ ; first joint more or less 

 angulate in front at the apex, third much longer than the 

 fourth ; fifth to tenth successively shorter, each cariuate in front 

 and angulate at the apex ; eleventh appendiculate, longer than the 

 tenth. Prothorax constricted and transversely grooved near base 

 and apex, dilated in the middle, and usually tuberculate at each 

 side. Scutellum triangular, with the apex acute and more or less 



