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the margins), but crossed by a thin yellowish line from lateral 
margin to suture. Body beneath silky ashy. Legs reddish, 
ringed with grey and black. 
J Terminal abdominal segment with dorsal plate semicircu- 
larly notched at the tip, ventral with a shallower notch. 
Found only at S. Paulo, Upper Amazons. 
5. Toronceus virens, n. sp. 
T. ohlongus, convexiusculus, fusco sericeus, viridi micans : elytris 
plaga magna ante medium cinerea, apicibus canis utrinque macula 
trans versa fusca. Long. 3^-4|- lin. S $ • 
Head sooty black, cheeks yellowish ashy. Antennse reddish, 
bases of third to sixth joints pallid. Thorax very little broader 
than the head, the sides in the middle with a conical protuber- 
ance, surface dark brown, becoming green in certain lights ; 
disk speckled with tawny ashy, sides ashy, with a brown streak. 
Elytra oblong, obliquely truncated, surface punctured, except at 
the apex ; dark brown, with a large patch before the middle, 
and the apical region ashy, the apical spot enclosing a transverse 
curved blackish streak : the whole surface has a silky green 
lustre in certain lights. Body beneath ashy. Legs blackish, 
ringed with ashy. 
(S Terminal abdominal segment with both dorsal and ventral 
plates deeply notched. 
$ Ovipositor projecting one line and a half beyond the tips 
of the elytra ; ventral plate deeply notched. 
A common insect on branches of fallen trees in the forest, 
both on the Upper and Lower Amazons. 
Genus Callipero, nov. gen. 
Body elongate, narrow; head and thorax of nearly equal 
width, and narrower than the elytra. Muzzle short, lower lobe 
of the eyes short, and narrower below than above. Thorax with 
a slight protuberance behind the middle, but free from lateral 
spines or tubercles. Elytra without lateral keels, clothed with 
short setse. Sterna simple. Antennae moderately elongated; 
third to seventh joints thickened (the seventh thicker than the 
rest), and densely clothed on their under surface with short 
setae, besides the usual longer bristles which exist on all the 
joints (except the first) both above and beneath. Ovipositor of 
the female not exserted ; terminal abdominal segment elongated 
and conical, with the dorsal plate pointed, and ventral truncated. 
Legs moderately elongated ; thighs clavate ; basal joint of pos- 
terior tarsi as long as the three following taken together. 
This genus differs from all the genera of Acanthocinitse known 
p 
