COLEOPTEROUS INSECTS. 201 



and there are two tubercles towards the middle, and 

 two others, one on each side, near the margin. The 

 elytra are of a dull greyish yellow thickly clouded 

 with black, and marked with longitudinal lines or 

 striae. The under parts of the body and legs are 

 black, slightly tinged with a metallic lustre. The 

 male has an elongate, slightly nutant, horn on the 

 hinder part of the head ; the female has two ele- 

 vated cross ridges, which are somewhat arched. The 

 length of the insect is about three or three and a 

 half lines. 



The next important genus that presents itself to 

 our notice, was established by Mr Macleay in his 

 valuable work on the lamellicorn Coleoptera, and is 

 named 



It is distinguished from all the allied genera, ex- 

 cept Onitis, by the structure of the antennae. These 

 organs consist of nine joints, the three last forming 

 a mass of which the basal joint (or the seventh of 

 the whole) is excavated and receives the following 

 one within it, which is partly concealed and nearly 

 of the figure of a horse shoe ; the terminal one is 

 small and in the form of a reversed cup. The ra- 

 dical joint of the labial palpi is larger than the others, 

 and dilated on its inner side. There is no apparent 

 scutellum, but a small opening is perceptible at the 

 base of the sutural line, indicating its place. The 



