CERAMBYCID.E. Ill 



front ; the black part of the middle of the thorax is wider in 

 front than behind, and consequently the yellow margin is widest 

 behind, the reverse of which obtains in the M. zonatum : the 

 scutellum is golden, and near it is an elongated yellow triangular 

 mark common to both elytra ; the pale yellowish band across the 

 elytra is placed nearer to the end, and the ridge down the middle 

 is more distinct ; under side of head, thorax and basal segment 

 of abdomen in middle yellow, sides of abdomen yellow, the 

 yellow colour only seen in some lights from the greyish pubes- 

 cence with which the darkish abdomen is covered. (A female.) 



Hab. Brazil (Coll. Bates). 



3. Mallosoma fuligineum. B.M. 



Mallosoma fuligineum., Newman, Ent. p. 7- 

 Mallosoma thoracicum, Chevr. Coll. 

 Hab. Brazil (Ent. Club). 



4. Mallosoma submetallicum. B.M. 



Callidium submetallicum, Blanchard, Chevr. Coll. 

 Hab. Chili. 



5. Mallosoma thoracicum, n. s. B.M, 



M. nigro-sericeum, thorace rufescente, maculis quinque dorsalibus 

 nigrescentibus, duabus parvis anticis approximatis, duabus 

 majoribus, subdistantibus, unaque parvula postica. 



Head brownish black; antennae with the four basal joints 

 black, the others of a ferruginous brown; third and fourth joints 

 spiaed at the end. Thorax on the sides angled, of a light red, 

 with more or less of a gre)dsh silky pubescence ; upper surface 

 with five blackish spots, two fore ones small, transverse, approxi- 

 mating, two behind larger, transverse and somewhat distant, a 

 small one in the middle behind; two incurved ridges on the 

 thorax, not extending to the fore or hind margins. Elytra with 

 the sides parallel, the back somewhat depressed, each elytron 

 truncated at the tip ; of a black colour with silky grey pubes- 

 cence and bristly hairs arranged in lines ; two blacker streaks at 

 the base, and the side margin at base also of a clearer black ; 

 under side of abdomen covered with silky pubescence. Legs 

 slightly clavate. 



Length \\ lines. 

 Hab. Brazil. 



This species at first sight has a considerable resemblance to 

 species of Listroptera, such as L. collaris. 



