Species of Agra of the Amazons Region. 381 
$ Metasterno segmentisque ventralibus medio minus dense 
pilosis. 
Long. 7 lin. 
This species, which I cannot think is more than a local form of 
the same stock as 4, cytherea, occurred at Para and on the Lower 
Amazons, 4. cytherea being confined to the neighbourhood of 
Ega on the Upper Amazons. Baron Chaudoir, on whose autho- 
rity I have referred my specimens to his species, records a 
wide range for it, he having two specimens, one from the Rio 
Negro (Amazons) and the other from South Brazil. 
38. Agra varians, Chaudoir. 
Agra varians, Chaud. Ann. Soc. Ent. Fr. 1861, p. 133. 
A, cythere@ forma similis, differt in colore, certe species dis- 
tinctissima ; nigra, elytris obscure viridibus, interdum zeneis 
et rubro-cupreis; capite pone oculos paulo latiori, feminz 
subquadrato, maris rotundato-attenuato ; elytris apice triden- 
tato, dente intermedio validiori, suturali obtuso, supra magis 
fortiter punctato-striatis. 
Long. 7—8 lin. 
Sull more common than 4. cytherea at Ega. I convinced my- 
se!f on the spot that the two species kept themselves perfectly 
distinct, and no intermediate forms were found which could prove 
that they ever intercrossed. 
39. Agra optima, n. sp. 
M. de Chaudoir has given me the following description of this 
species :— 
“4. splendid, Dej., valde affinis, forsan hujus speciei femina. 
Differt capite postice latiori, pone oculos magis rotundato, 
thorace crassiori, lateribus etiam magis rotundato; elytris 
paulo brevioribus, apice tridentatis sed dente suturali haud 
producto, obtuso, nec reflexo; antennis brevioribus, articulo 
8° breviusculo: elytris colore rubro-cupreis, splendidis.” 
Long. 93 lin. @. 
Villa Nova. 
M. de Chaudoir adds, after comparing my specimen with De- 
jean’s type in his own collection, that the affinity with 4. splen- 
dida (Dej.) is very great, and that, excepting the sexual diffe- 
rences, he finds no distinctive character except in the conformation 
of the tip of the elytra, which usually offers no difference in the 
