Mr. Westwood on the Affinities of Clinidium. 217 
beyond the mentum. The lower lip is attached to the inside of the 
mentum, and is very minute and triangular; the palpi are rather long, 
and composed of three joints of nearly equal length, the first of which 
is slender, the second rather thicker at the tip, and the third the thickest, 
especially in the middle, with the tip acute (Ibid. E.) The mentum is 
very large and horny, and occupies the whole of the under side of the 
head ; its front is produced into three points, the medial being the most 
advanced ; it is covered on the outside with punctures (Ibid. A.), and is 
fleshy on the inside where the lower lip and maxille are attached to it. 
The anterior angles of the thorax are rounded, and the place of the 
insertion of the head is narrower than at its base, although, as Dalman 
observes, the base is narrower than the front part of the thorax. 
The femora of all the degs are thickened ; the tip, however, of each 
is slenderer, being hollowed beneath to receive the slightly incrassated 
base of the tibiz in the manner represented in fig. 1, K. and L. 
The tips of the four posterior tibie are slightly clothed with hairs on 
the inside, and are rather thicker than the rest of the joint. They are also 
furnished with two spines of unequal length on the inside, so that when 
the legis laterally observed, the tip of the tibia appears to be emargi- 
nate (Ibid. fig. I.) The tip of the cubiti or anterior tibiz is, however, 
different, having the inner edge produced at the tip, both above and be- 
low, into a bent obtuse spine, below each of which there is a much 
smaller spine, and the surface between these spines thus appears both 
above and below to be emarginate and ciliated (Ibid. F. G, and H.) The 
formation of these parts is not satisfactorily detailed in the account of 
Clinidium, 
Having thus endeavoured to supply the description of the characters 
omitted by Dalman, I now proceed to trace the various points of resem- 
blance and disagreement between the two genera. 
If we regard general appearance or habit, as well as size, we are im- 
mediately struck with the resemblance between the insects; indeed it is 
even carried so far as to exist in the singular sculpturing of the head and 
thorax. 
If we regard natural habits, we find them similar, Dalman describing 
the Rhysodes as collected in numbers by Paykull “ in ligno putrido abie- 
