BY W. MACLEAY, JUN., ESQ. 185 



angles, and is rounded and almost lobate behind, The elytra 

 taken together are of an oblong oval shape with the base some- 

 vv^hat scooped out. They have each seven rows of very fine 

 punctui-es, and one large punctui^e about a third from the apex 

 between the fourth and fifth row. In my specimen the legs are 

 wanting as are also the antennae, palpi, &c. 



I place this species in the G. marginatum group, simply 

 because it answers to two of the chief characters of that group, 

 viz., thorax broader than long, and elytra bipunctate. The 

 specimen is so imperfect however that I cannot fix its position 

 with any certainty. It is one of the many rare things, for which 

 I am indebted to F. G. Waterhouse, Esq., of the South Australian 

 Institute. 



18. Carenum fro:ntale. 



Nigrum nitidum, capite fronte bipunctato, elytris sabviolaceis 

 postice bipunctatis, tibiis anticis extus bidentatis. 



Long. 9. lin., lat. 3 lin. 



Hab. Wallaroo, South Australia. 

 For this insect I am also indebted to Mr. Waterhouse. The 

 facial grooves are nearly straight, and between them in the 

 middle of the face are two large punctures placed horizontally. 

 The thorax is slightly emarginate behind, as is C. marginatum. 

 The elytra are of a violet hue margined with green, and have 

 two punctures towards their apex. The fore tibiae are bidentate 

 externally, with three minute teeth above. 



The last five species belong to the group of my table, of 

 which C. marginatum is the type. Of the species now comprising 

 that group, G. marginatum laevigatum, puncticolle, piuidulatum, 

 Murrumhidgense, laterale, and subporcatulum, are all so much 

 alike, that the closest observation is necessary to make out 

 the specific characters. I have, however, I hope, sufficiently 

 marked them out in the description I have given of eacli species. 

 Of the other three species composing the group, C. scitidum 

 most resembles G. Bonellii, G. frontale seems to approach to some 

 of the tridentate species, while G. striato-punctatuni is entirely 

 " sui generis.'''' 



