102 Mr. H. W. Bates on the Longicorn Coleoptera 



diverging on the occiput. Antennae greatly elongated and 

 robust, black, sixth joint ringed with white, tenth joint with an 

 exterior white line {^), in the ? the eighth and eleventh joints 

 also streaked with white. Thorax blackish, clothed with an 

 olivaceous silky pile, the upper surface with two tawny-ashy, 

 slender, nearly parallel lines ; sides each with a single similar 

 line, besides a broader streak above the coxse. Elytra broad at 

 the base, with prominent and not markedly oblique shoul- 

 ders, regularly attenuated thence to the apex, which is truncated 

 and has the external angles produced into spines ; the surface 

 has a few fine punctures surmounted by acute granulations to- 

 wards the base, and beset with short black bristles ; the colour 

 is blackish, clothed with silky olivaceous pile, and ornamented 

 with a small number of scattered and distinct, rounded, tawny- 

 ashy spots, the extreme apex having an ashy-white border de- 

 creasing in width from the suture to the external angle. Body 

 beneath black, thinly clothed with ashy tomentum ; the sides of 

 the breast have a tawny-ashy streak in continuation of the one 

 on the prothorax, and the sides of the abdomen are spotted with 

 the same colour. The legs are blackish, ringed with grey. 



^ . Terminal ventral segment narrowed to the apex, trun- 

 cated, with the angles produced into stout spines ; dorsal seg- 

 ment obtuse. Legs stout ; anterior tarsi moderately dilated and 

 fringed. In the smaller males the legs are not perceptibly 

 thicker than in the females. 



$ . Terminal abdominal segment projecting considerably be- 

 yond the apex of the elytra, broad; dorsal segment notched, 

 ventral truncated, angles not produced. 



A common insect at Ega and S. Paulo, Upper Amazons. 



30. Colohothea lucaria, n. sp. 



C modice elongata, nigra, vertice lineis duabus divergentibus, tho- 

 race lineis tenuibus quatuor, elytris maculis paucis hie illic con- 

 gregatis, griseis ; his apice cano marginatis, oblique truncatis, 

 angulis externis spinosis. Long. 5 lin. ^ . 



Head black, forehead with three obscure grey lines, vertex 

 with two divergent lines of similar colour, and the posterior part 

 of the orbits also grey. Antennae black, base of fourth, eighth, 

 and tenth joints grey on one side, sixth joint with a whitish 

 ring. Thorax black, with a silky olivaceous gloss, upper surface 

 with two slender parallel grey lines, each side also with a similar 

 line visible in part when the insect is regarded from above; 

 there is also a grey line above the coxae. Elytra prominent, and 

 scarcely oblique at tire shoulders, thence gradually attenuated 

 to the apex, which, is on each side obliquely truncated, i. e. the 

 sutural portion is more advanced than the lateral angles, which 



