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proximating on the crown ; antenniferous tubercles distinct, 
divergent. Antennae scarcely so long as the body, stout, the 
joints simple and gradually tapering to the apex, basal joint 
thickened gradually from base to apex. Thorax subcylindrical, 
finely wrinkled transversely, sides each armed with an acute 
spiniform tubercle. Legs moderately elongated, thighs clavate, 
middle tibiae simple on their outer edge ; tarsi about half the 
length of the tibiae, broad, not compressed; basal joint in all the 
feet short, triangular ; claw-joint slender, projecting beyond the 
third joint to an extent equal to the length of the third joint ; 
claws widely divergent and strongly curved, furnished at the 
base on the inner side with a broad square enlargement. Pro- 
sternum narrow, simple; mesosternum rather broad, bitubercii- 
lated, and vertically inclined anteriorly. 
Chalcolyne metallicaj Pascoe. 
Onocephalai^) metallica, Pascoe, Trans. Ent. Soc. n. s. iv. (1858). 
C. oblonga, nitens, nigro-senea, breviter fusco setosa ; elytris viridi- 
seneis, striato-punctatis ; thorace subcylindrico, elytris multo an- 
gustiore, antice leviter angustato, supra transverse rugoso, lateribus 
utrinque tubereulo acuto armatis. Long. 5 lin. c? ? 
Found only at Ega, Upper Amazons, on the stem of a slender 
tree in the forest. The insect is very similar in form to Gryllica 
flavo-pmtulatay Thoms., but differs not only in the spinose tho- 
rax and metallic colours, but in the basal joints of the antennse 
not being compressed. 
Genus Eumimesis, nov. gen. 
Body oblong, above plane, clothed with short, stiff hairs. 
Elytra oblong, broadly rounded at the tip. Head with long, 
slightly retracted face ; mouth somewhat projecting ; palpi 
elongate, pointed; eyes ample, but distant on the vertex; an- 
tenniferous tubercles distinct, divergent. Antennae short ; basal 
joint oblong-quadrate, compressed ; second joint rather abruptly 
dilated from the middle ; third joint curved and dilated at the 
apex ; fourth with the upper edge enlarged into a short foliaceous 
expansion; remaining joints very short, simple. Thorax sub- 
cylindrical, thickly punctured, sides each armed with an acute 
spiniform tubercle. Legs moderately elongated, thighs clavate, 
middle tibiae simple on their outer edge, tarsi short and uncom- 
pressed, claw-joint slender and short; claws divergent and 
strongly curved, furnished at the base on their inner side with a 
broad tooth. Prosternum narrow, simple ; mesosternum much 
broader, bituberculate, steeply inclined anteriorly. 
This genus, as will be seen by the above description, harmo- 
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