216 THE PROCEEDINGS OF THE LINNEAN SOCIETY 



Legs moderately robust ; the fore tibiae strong and armed on 

 the inner apex, with a stout pointed curved spine, and with the 

 emargination on the inner side rather small ; three joints of the 

 tarsi of the male dilated. 



Body apterous, sub-elongate, and convex, separated from the 

 thorax by a peduncle. 



Prosternum, flat between the coxa?, extending a little backwards 

 and without margin. 



CORONACANTHUS SULCATUS. 



Of rather elongate form, about ten lines in length, and of a 

 nitid black colour, with the sides of the thorax and elytra golden 

 green, and the antennae, palpi, and tarsi piceous. 



The head is smooth, without facial grooves, of moderate size 

 and not narrowed into a neck behind. The thorax is rather 

 longer than the width, rounded at the sides and base, and very 

 deeply and largely impressed near the posterior angles, which 

 have a broad recurved margin. 



The elytra are each marked with three deep smooth striae, the 

 space between the first and second being twice the width of the other 

 interspaces, rather convex, and having an impressed puncture on 

 its outer side not far from the apex. There are two rows of large 

 punctures on each lateral margin, the outer one not continuous 

 to the apex. 



I have received a number of specimens of this remarkable and 

 beautiful insect from Port Darwin. It seems curious that a 

 beetle, apparently so abundant, should have hitherto escaped 

 observation, but I have searched in vain for any notice of it in 

 any publication of recent date. 



I have named the genus from the curved form of the spine at 

 the inner apex of the fore tibiae. 



COPTOCARPUS PLANIPENNIS. 



This insect very closely resembles G. Biverince, a species 

 described by me a few years ago in Vol. II., p. 329 of the Pro- 

 ceedings of the Entomological Society of New South Wales. It 



