BY WILLIAM MACLEAY, F.L.S., &C. 201 



certainly the female of the species just described, but I have no 

 certain proof of the fact. It is longer, broader and slightly flatter 

 than the male insect, is of a dark metallic green on the head and 

 thorax, which are densely punctate, the elytra are of a purplish 

 blue ; the fore tibiae are sexdentate externally and the mandibles 

 are very short. In all other respects it is exactly like the male 

 specimen described above. I cannot give the exact habitat of 

 this specimen, as it is only labelled " New South Wales," but it 

 is probably also from the Clarence River District. 



Rhyssonotus laticeps. n. sp. 



Black, nitid, slightly convex. The head is very short and very 

 broad, the anterior angles extending laterally to the width of the 

 thorax ; its anterior margin is nearly straight, and its upper 

 surface is very rugose and densely punctate, with an elevation in 

 the middle terminating in two small tubercles, and with a depression 

 on each side. The mandibles are twice the length of the head, broad, 

 very roughly punctured, pilose, cuiwed upward a little at the apex, 

 and armed on the inner side with several obtuse teeth. The 

 antennae are short, the club consisting of six joints. The mentum 

 is triangular, and immediately behind it, on the jugulum, there is 

 a large compressed transverse tubercle. The eyes are completely 

 divided. The thorax is finely and sparingly punctate, broader 

 than the length, and of the same width as the triangular 

 extension of the head ; the sides are parallel, the apex and base 

 almost truncate, the posterior angles excised, and the median line 

 deep, with a fovea on each side near the middle. The scutellum is 

 transversely rounded and punctured lightly. The elytra are of 

 the width of the thorax and not twice the length, profoundly 

 striato-punctate, with the four of five interstices nearest the 

 suture, smooth and convex near the base. The under surface is 

 minutely punctate and rather pilose. The fore tibise are armed 

 externally with four rather small teeth, the middle tibiae with one. 



Length, 9 lines. 



