84 RKVISION OF THE AUSTRALIAN AMARYGMIDES, 



distinctions, for among upwards of a liundred specimens whicli I 

 have examined, I find some in whicli tlie seriate punctures of the 

 elytra are quite as large as in iridicolor (with intermediate shades 

 of difference), and a few in which the colours approximate a little 

 to iridicolor, while in a few (otherwise indistinguishable) the 

 interstices are almost impunctate, and in some (all, I think, from 

 the northern parts of N. S. Wales) the red hairs in the tarsal 

 vestiture are quite as plentiful as the black ones. In all pro- 

 bability Amarygmus resplendens, Boisd., is one of these varieties. 

 These variations, if they be mere variations, are especially 

 remarkable because in other species of Chalcoi^terus the sculpture 

 seems very constant, scarcely varying for example in C. cupripennisy 

 Blackb., (of which I have examined large numbers), exce[)t in the 

 slight sexual variation that I have referred to in describing that 

 insect. 



C. VIRIDICOLLIS; W. S. Macl. 



This is an extremely distinct species, not very near any other 

 that I have seen. In a natural arrangement of the Chalcoj)teri 

 it would probably stand nob far from Icetus, Blackb., but the 

 exigencies of classification require me to place it at the other end 

 of the genus on account of its having perfectly distinct (though 

 not very greatly developed) ocular sulci. It is an oval, somewhat 

 elongate, moderately convex species of moderate size (long. 6, 

 lat. 34 lines). The type is coloured as follows : — head and pro- 

 thorax dark rich green, elytra coppery or golden or purple, 

 according to the point of view, undersurface iridescent (blue, 

 green and purple), legs and antennae black. The antennae (^ 1) 

 are considerably shorter than half the length of the body, and are 

 not much thickened towards the apex, joints 8-10 not much 

 shorter than the joints immediately preceding them. The clypeus 

 and labrum are closely punctured, the rest of the head very 

 sparsely. The space between the eyes is moderately wide (about 

 ^ of the width of the same in C. cupripennis, Blackb.), and in the 

 type is of peculiar form, its front and hind part resembling two 

 plates applied to each other almost at a right angle (of course 



