of the Amazon Valley. 145 
Seriphus viridis, n. sp. 
S. supra viridi-sericeus, purpureo nitens, nigro setosus: thorace 
postice macula, elytris plagis tribus cinereo-tomentosis. Long. 
33 lin. ¢. 
Head minutely punctured, black; vertex silky green. An- 
tenne black; base of the third joint and a broad ring on the 
fourth grey. Thorax shagreened silky green, the middle of the 
hind margin with a patch of ashy tomentum. Elytra briefly 
truncated at the tip; surface thickly punctured towards the 
base, and having besides many rows of setiferous punctures, 
running from base to apex; silky green, changing with the play 
of light into dullish purple; a rounded spot of ashy tomentum 
on the disk of each before the middle, and a similar common 
spot over the suture near the apex. Legs shining black. Body 
beneath black, clothed with scant ashy pile. 
One example only of this peculiarly-coloured species occurred, 
namely at Ega, on the Upper Amazons. 
Genus Ciporeza, Serville. 
Leiopus (§ Gidopeza), Serville, Ann. Soc. Ent. Fr. iv. p. 88. 
This group was distinguished by Serville from Leiopus on 
account of the singular dilatation of the basal joint of the 
anterior tarsi, and the length of the basal jomt of the hind 
tarsi, which ‘“ equals the three following taken together.” The 
enlargement of the anterior tarsi, which is peculiar to the males, 
seems to be only a specific character, as several other species, 
agreeing with Serville’s (idopeza in shape of thorax and tarsi, 
style of coloration, and other minor features, do not present this 
peculiarity. The group seems to be distinguished from Trypa- 
nidius, to which it is otherwise closely related, by the great 
narrowness of the prosternum, the depressed mesosternum, and 
the length of the hind tarsi. The thorax is convex, and widens 
from the front to the tips of the lateral spines, which are conical 
and placed a little behind the middle. The elytra are somewhat 
uneven, with faint carine and centro-basal ridges; they are 
sparsely setose in some species, naked in others. The terminal 
ventral and dorsal plates in the ¢ are more or less emarginated ; 
and the ovipositor of the ? with its sheath is elongated, the ven- 
tral plate being truncated, and the dorsal pointed. 
1. Cdopeza pogonocheroides, Serv. 
Leiopus (C&dopeza) Pogonocheroides, Serv. l.c. p. 88. 
This species is sufficiently well known through the description 
of Serville. It is of a brown colour, tawny in some parts, and 
marked behind the middle of the elytra with a black angulated 
Ann. & Mag. N. Hist. Ser. 3. Vol. xin. 10 
