of the Amazons Valley. 383 



ring. Thorax depressed at the base, ashy or tawny, with abroad 

 central vitta, and, on each side, three narrower vittse, purplish 

 brown. Elytra moderately elongated, apex sinuate-truncate, 

 with exterior angles produced into spines, and sutural angles 

 dentiform ; surface grey, minutely speckled with dusky and 

 sprinkled with larger tawny (most often rounded) spots : each 

 side has three transverse-quadrate purplish-brown spots or fasciae, 

 which do not reach the suture, the apex edged with tawny. 

 Body beneath clothed with tawny-ashy pile ; abdomen spotted 

 on the sides with black. Legs reddish, spotted with ashy. 



Terminal abdominal segment rather more tapering in the 

 female than in the male ; dorsal plate notched in both sexes ; 

 ventral plate terminating in spines in the male, angles simply 

 acute in the female. Fore tarsi in the male moderately dilated, 

 fringed with long hairs. 



Branches of felled trees : Para, Obydos, and banks of the 

 Tapajos. Also found at Cayenne. I have seen it, in French 

 collections, under the name of C. sexlineata (Reiche, MS.) — a 

 name which I have not adopted, as the thorax has seven lines, 

 and not six. 



12. Colobothea destituta, n. sp. 



C. minus elongata, obscure grisea ; capite nigro, vertice lineis duabus 

 divergentibus griseis ; thorace vittis septem nigris, quarum una 

 mediana latiore ; elytris obscure griseis, nigro confertim irroratis, 

 ciiiereo-griseo macalatis, fasciis interruptis tribus vel duabus (plus 

 minusve obsoletis) nigris, apice sinuato-truncatis, angulis interiori- 

 bus prominulis, exterioribus spiniformibus. Long. 4^-G lin. <S $ . 



Head blackish, forehead streaked with ashy-grey, vertex with 

 two fine ashy lines diverging on the occiput. Antennae black, 

 fourth, sixth, eighth, and tenth joints with a whitish ring. Tho- 

 rax dull grey, with seven black vitta?, central one twice as thick as 

 any of the rest. Elytra moderately elongated and tapering, apex 

 sinuate-truncate, sutural angles dentiform, external spiniform ; 

 surface obscure grey, thickly irrorated with blackish, and having 

 a few larger ashy, mostly rounded spots ; each with two (and some- 

 times an indication of a third) transverse quadrate black spots, 

 not distinctly limited. Body beneath ashy ; abdomen spotted 

 on the sides with black. Legs black, spotted with grey. 



(^. Terminal ventral plate sinuate-truncate, angles acute; 

 dorsal plate narrower, sinuate-truncate. 



?. Terminal abdominal segment elongated and tapering; 

 both plates sinuate-truncate, not spinose. 



On branches of dead trees. Para. 



13. Colobothea seminalis, n. sp. 



C. minus elongata, fusco-nigra j capitis vertice liueis duabus diver- 



