72 RHYNCHOPHORA. 
longer than the second. Basal ventral segments extremely elongate, without trace of 
division. Apices of the elytra not prolonged. 
It is probable that Brenthus sublevis, Boh., belongs to this genus. 
1. Nemobrenthus eneipennis, sp. n. (Tab. IIT. fig. 8.) 
Piceus, elytris cupreis vel viridi-cupreis, bisulcatis, antennis nigricantibus; glaber, tantum ad rostri latera 
_- punctis paucis impressis. 
Long. 12-24 millim. 
Hab. Panama, Volcan de Chiriqui, David (Champion). 
This insect is remarkable for its freedom from punctuation; on each of the lateral 
faces of the rostrum there are from six to twelve large punctures, in some of which, if 
not in all, there may be detected a very minute curved seta; the under surfaces of the 
head and rostrum are quite impunctate, but on the middle of the head there is a 
definite, deep fovea, connected with the base of the head by a very distinct channel ; 
the surface is not polished, but exhibits a silky opacity. On the upper face the head 
and rostrum are more polished ; in front of the insertion of the antenne there is a very 
deep broad channel. ‘The thorax is very long, curved at the sides, and much narrowed 
in front, deeply and broadly sulcate. Elytra of a shining metallic colour, definitely 
bisuleate near the suture, the apical impressions very coarsely rugose. Breast and 
abdomen not sulcate, the former with a small fovea in the middle behind; apical 
ventral segments not punctate, except on the hind margin of the last plate. Second 
and third joints of the tarsi broadly and deeply impressed on their upper surfaces. 
The two individuals obtained of this species differ remarkably in size; the large 
individual has the wing-cases brassy, while in the smaller one they are metallic green. 
In the collection at the British Museum there is a specimen belonging apparently 
to this species labelled “ Amazones.” 
NEMOCORYNA, gen. nov. 
Antenne mediocres, articulis tribus clavam gracilem formantibus. Caput elongatum, a collo vix separatum. 
Pedes sat graciles; femoribus pedunculatis, parum elongatis ; tarsis sat gracilibus. 
This genus is proposed for two species, of each of which we have received a single 
example of the male sex. Were it not for the form of the antenne these insects might 
be placed in Nemocephalus; the organs in question have the three terminal joints 
strongly different from the preceding joints in both form and clothing (Tab. IIT. fig. 10), 
so that these insects had better be placed in a distinct genus. Joints 1-8 of the antenne 
are polished and bear a few long sete, while joints 9-11 are very densely punctured, 
dull, and provided with a minute dense pubescence. ‘here is only an extremely vague 
depression to separate the head from the neck. I have seen several allied forms from 
Brazil, but in none of them does the ninth joint of the antenne differ greatly in form 
and sculpture from the eighth, so that not any of them can enter the genus. The two 
