of the Amazon Valley. 321 



2. Odontocera poecilopoda. 

 White, Cat. Longic. Brit. Mus. p. 191. 



" Nigra, elytris vitreis pallidis nigro-marginatis ; ab- 

 dominis basi subtus et apice pallidis; pedibus nigris, 

 femorum tibiarumque basi alba; tibiis posticis pilis 

 nigris hirtis." (White.) 



Long. 5| lin. cJ. 



The above description applies only to the <S . In the 

 ? the abdomen is wholly testaceous-red ; in both sexes 

 it is much narrower than the metasternum, but in the S 

 it is exceedingly slender and linear in form. The hind 

 tarsi in the ? are pale testaceous. In both sexes the 

 head and thorax are black, and the elytra are one-third 

 shorter than the abdomen. The long black hairs of the 

 hind tibiae form a brush all round the joint from the 

 middle to the apex. 



Hah. — River Tapajos. 



3. Odontocera dispar, n. sp. 



0. poecilopodce valde affinis; c? differt solum vitta 

 laterali elytrorum ante apicera desinente ; $ valde di- 

 versa, thorace fulvo, macula dorsali postica nigra; ab- 

 domine testaceo-fulvo, segmento 2ndo macula laterali 

 nigra ; tarsis omnibus flavis. 



Long. 4^-51 lin. c? ? . 



Hab. — Ega; abundant. 



4. Odontocera cinctiventris, n. sp. 



Minus elongata, nigra ; capite grosse punctato, nitido ; 

 thorace breviori, postice angustiori, rotundato, asqualiter 

 convexo, dense reticulato-punctato, marginibus antico et 

 postico lineaque curvata laterali aureo-tomentosis ; scu- 

 tello aureo-tomentoso ; elytris abdomine vix brevioribus, 

 grosse et dense punctatis, medio utrinque flavo vitreo, 

 vix punctulato ; abdomine vespiformi, segmento basali 

 rufo, reliquis argenteo-marginatis ;^ pedibus nigris, fe- 

 moribus tibiisque basi testaceis, femoribus gradatim 

 incrassatis. 



Long. 4 lin. ( cJ ?) . 



Hab. — Ega and Tapajos. 



