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



6. Oncideres dignus, n. sp. 



O. cylindricus, fuscus ; thorace tuberculis quinque in linea trans- 

 versa ordinatis ; elytris prope basin tuberculis magnis globosis 

 utrinque sex nigris, postice guttis numerosis albis. Long.lOlin. S • 

 Head ( ^ ) moderately narrow ; forehead very narrow, being 

 encroached upon by the voluminous eyes, which are oblong and 

 reach very nearly to the extremity of the muzzle ; antenniferous 

 tubercles unarmed ; colour dark brown. Antennae nearly twice 

 the length of the body, black, basal joint gradually thickened 

 from base to apex, rest of the antennae tapering to the tip. 

 Thorax longer and narrower than in the typical species of Onci- 

 deres ; lateral tubercles small, obtuse, and black ; in a line with 

 them is a row of five similar glossy-black tubercles lying across 

 the middle of the thorax; colour dark brown. Elytra cylin- 

 drical, clear dark brown, impunctate; middle of base with six 

 very prominent glossy-black tubercles, arranged in two rows ; 

 besides these, there are ten or twelve smaller tubercles on each 

 side, three of which are on the shoulder : the rest of the elytra 

 smooth, and ornamented with a number of small clear white 

 spots, distributed regularly and widely apart over the surface. 

 Body beneath and legs dark brown. 



This handsome species was very rare, at Ega, Upper Amazons. 



7. Oncideres pulchellus, n. sp. 



O. minor, cylindricus, griseo-brunneus ; elytris cinereo maculatis, 



dimidio basali tubercuUs rotundatis, dimidio apicali maculis im- 



pressis, nigro-nitidis. Long. 6| lin. $ . 



Head and thorax of same breadth ; head ashy brown, with a 

 streak down each side of the front tawny; buccal organs and 

 circuit of the mouth red. Antennse a little longer than the 

 body, dark brown. Thorax ashy brown, with three shining- 

 black tubercles in a triangle on the disk, and two smaller ones 

 on each side, the outermost of which is in the position of the 

 ordinary lateral tubercle. Elytra cylindrical, obtuse behind, 

 ashy brown, varied with a small number of equal-sized and equi- 

 distant pale ashy spots, and with a number of scattered shining 

 round spots, those over the basal half covering large rounded 

 tubercles of small elevation, and those towards the apex shallow 

 impressions; the tubercles are not crowded near the base or 

 shoulders, but are widely dispersed. Body beneath and legs 

 light brown ; sides of breast with an ashy patch. 



Ega; rare. 



8. Oncideres Cephalotes, n. sp. 



O. magnus, robustus, convexus, postice attenuatus, cinereo-brunneus; 

 elytris prope basin dense, pone basin sparsim tuberculatis, tuber- 



