16 



and narrower than tenth. Prothorax 4J x 9 mm., twice 

 as wide at base as at apex, nearly straight in front, bisinuate 

 at base, sides little narrowed on basal half, abruptly and sub- 

 sinuately narrowed to the widely obtuse anterior angles, pos- 

 terior angles (seen from above) subrectangular, lateral mar- 

 gins evident throughout from above, disc closely, not strongly, 

 punctate, the median line more or less visible. Scutellum 

 transverse triangular, metallic. Elytra 19 x 11 J mm., of 

 same width as prothorax at base, very convex ; the highest 

 point of curve (seen from the side) in front of middle, widest 

 behind middle; seriate-punctate, the punctures in series close 

 and small near suture (of the same size as in C . iridicolor , 

 Bless.), larger towards the sides and clearly defined to the 

 apex; intervals quite flat everywhere, closely and rather 

 strongly punctate (stronger than in C. iridicolor, Bless.). 

 Abdomen finely striolate, flanks of sternum with some larger 

 punctures, prosternum carinate; posterior tarsi with joints 

 one and four of equal length. Dimensions — 19-23 x 

 10-131 nim. 



Hah. — North Queensland: Endeavour River. 



This is the species considered erroneously as C . cujpreus, 

 Pab., by Blackburn, and is the largest Chalcopterus known to 

 me. The general colour and form of C. maximus is nearest C . 

 ^upripennis, Hope ( = froggatti, Blkb.), especially in its wide, 

 somewhat explanate prothorax, and its mingled colours, with 

 greenish suture. The coppery pronotum is sometimes obscured 

 by age or alcohol, and appears black. In my two fresher 

 specimens the greenish line of punctures is in marked con- 

 trast with the more coppery intervals. Types in the author's 

 collection. 



Chalcopterus c^sar, n. sp. 



Convex, elongate-ovate, head and prothorax metallic- 

 green and purple, elytra with brilliantly variegated colours 

 arranged in vittse in the following order : the suture golden, 

 then stripes of purple, blue, golden-green, purple, green, 

 lastly the extreme border narrowly golden; the prosternum 

 also slightly metallic (in one specimen brightly so). Abdomen, 

 legs, antennae nitid black, tarsal vestiture black, with some 

 fine reddish hairs on apical-joint. 



Head deeply, closely punctate, distance between eyes 

 greater than the basal joint of the antennae, without clearly- 

 defined ocular sulcus, antennae much longer and less enlarged 

 at apex in male than in female, third joint longer than first 

 and second combined, and fully as long as the fourth and 

 fifth combined, fourth shorter than fifth, eighth to tenth 

 evidently shorter than the preceding, joint eleven longer and 

 jnore acuminate in male, shorter and more obtuse in female. 



