of species of Lu can idee. 361 



Boirneo, of a black colour, slightly shining and much 

 rubbed, but the longitudinal bands of colour formed by 

 fine setas are distinctly visible on the sides of the elytra, 

 on the disk of which are also to be observed with a lens 

 alternate longitudinal spaces thickly covered Avith minute 

 punctures (each of which has doubtless emitted a fine seta 

 now abraded), with intervening spaces almost destitute of 

 the fine punctvu-es; in this manner four distinct rows of 

 fulvous setfe can be traced on each elytron. The head 

 and thorax have also evidently been abraded. The head, 

 instead of being transverse as in the type of O. striatus, is 

 here nearly square, almost flat on the crown with the fore 

 margin nearly straight, and projecting considerably over 

 the base of the mandibles, the clypeus being, in fact, 

 inflexed beneath ; the sides of the head near the eyes are 

 punctured ; the mandibles are about twice the length of the 

 head, the basal half compressed, with a large, triangular, 

 slightly bifid tooth halfway between the middle and the 

 apex, which is also bifid, and in the anterior curve of the 

 lower tooth is a minute tubercle ; behind the eyes the 

 sides of the head have a small but acute incision ; the pro- 

 thorax has a slight lateral and posterior raised margin. The 

 anterior tibias are externally armed with six teeth, of 

 which the first is minute and placed near the middle of 

 the outer edge; the extremity of these tibiae is flattened, and 

 the teeth close together, so as to appear nearly palmate. 

 The four hind tibi^ are unarmed in the middle of the 

 outer edge; they are ornamented with longitudinal rows 

 of fulvous setaj. The tarsi are villose beneath. The eyes 

 are entirely divided by the slender septum. The mentum 

 is transverse, densely setose. The maxillte have the outer 

 lobe strongly setose, and the inner lobe minute and simple. 

 The prosternum is black, glossy, and concealed behind the 

 insertion of the forelegs, where it forms an acute prominent 

 point. The metasternum and abdomen are impunctate, 

 subopake and slightly setose. 



The specimen is 13^ lines long, and the mandibles are 

 6 lines long; the latter are deflexed. 



Nigidms obesus, Parry. (PI. III. fig. 5.) 

 Trans. Ent. Soc. 3rd Ser. vol. ii. p. 63. 

 " N. convexus, brevis, nigerrimus, nitidus ; capite utrinque 

 infra oculos auriculato ; mandibulis subrecurvis, intus ad 



TRANS. ENT. SOC 1874.— PART III. (jULY.) B B 



