Species of Agra of the Amazons Region. 365 
Genus Acra. 
Mentum lobis apice rotundatis, intus haud carinatis. Tibi non 
compressz, teretes. Zarst supra pilosi, articulis subelongatis, 
haud compressis, cordatis aut trigonis; unguiculis minus 
brevibus. 
A. Mentum lobis longioribus, angustis, apice subacute rotun- 
datis. 
1, Agra erythropus, Dejean. 
Agra erythropus, Dej. Spéc. Gén. i. 199. 
+ Pr , Chaud. Ann. Soc. Ent. Fr. 1861, p. 112. 
A. robusta, obscure anea; capite ovali, postice modice elon- 
gato, rotundato-attenuato, oculis valde prominentibus; thorace 
antice subito attenuato, Jateribus carinatis, episternis valde 
convexis, supra planis, sparsim punctatis; elytris humeris 
obliquis, pone medium ampliatis, apice peroblique truncatis, 
angulis suturalibus acutis, externis dentiformibus, dorso pro- 
funde punctato-striatis ; antennis pedibusque rufescentibus ; 
tibiis latis, compressis, angulis externis terminalibus haud 
prominulis; intermediis apice intus dilatatis. 
Long. 10 lin. @ 
$ Segmentis ventralibus punctatis, sparsim hirsutis ; segmento 
terminali dorsali inciso, ventrali late triangulariter emarginato; 
pedibus robustis, tarsis latis, articulo ultimo brevi, posticorum 
primo intus valde rotundato-dilatato. 
Villa Nova, Lower Amazons. On foliage. Itis on the authority 
of Baron Chaudoir that I refer the example I possess of this 
species to 4. erythropus of Dejean, the description of this author 
presenting no means of identifying the species with certainty. M. 
de Chaudoir, who possesses the type specimens of Dejean, was 
acquainted only with females of this and the other species of 
section A, 
2. Agra latipes, Chaudoir. 
Agra latipes, Chaud. Ann. Soc. Ent. Fr. 1861, p. 112. 
A. nigra, nitida, elytris aneo-tinctis ; capite ovali, angustato, — 
pone oculos elongato, leviter rotundato-attenuato ; thorace 
antice angustato, levi, medio linea impressa utrinque punc- 
tato, lateribus carinatis, episternis modice convexis ; elytris 
postice paulo ampliatis, apice peroblique truncatis, angulis 
suturalibus acutis, externis dentiformibus, dorso grosse 
punctato-striatis, punctis partim confluentibus ; tibiis com- 
pressis. 
 Segmentis ventralibus medio crebre punctatis, dense fusco- 
