218 Mr. Westwood on the Affinities of Clinidium. 
*© tis;’? and Mr. Kirby describing the Clinidiwm as taken in a rotten tree. 
Or if we direct our attention to structure, we find the same formation of 
antenne and labrum, the same long and acute terminal joint of the 
maxillary palpi and minuteness of mandibles, maxille, labium, and la- 
bial palpi, the same subdepressed body, the similar neck, the same 
shortness of legs, apparently the same spinosity at the tip of the tibie, 
and the same number of joints in the tarsi. 
Such are the chief resemblances, constituting a very intimate affinity; 
but there are numerous points of disagreement, although not of such 
material importance, between the two genera. 
Their geographical distribution is distinct, Clinidium being an inhabit- 
ant of the tropical regions of the islands of the New World, whilst Rhy- 
sodes appears to be distributed throughout the southern half of Europe, 
the habitats given by Dalman being ** Warnaus Blekingie,”’ Tauria, the 
Croatic Alps; ‘* et ut Americee Borealis—an recte >—communicavit Dom. 
“© Sturm.” In addition to which list M. Lefebvre has captured it in pro- 
fusion in Sicily, and Latreille informs us that M. Léon Dufour has disco- 
vered it in the Pyrenees. 
We also find a material variation in the formation of the mentum, 
which in Clinidiwm (notwithstanding the inability under which Mr. Kirby 
laboured to state the formation of the trophi so accurately as he could 
have wished) is described as being “ latum, utrinque tumidum,’’* whilst 
in Rhysodes it is flat and “ anticé sinuatum lobo medio acuto,”’ forming, 
in fact, the under side of the head, as represented fig. 1, A. The presence 
of reticulated eyes in Rhysodes is also a distinguishing character, if these 
organs be really wanting in Clinidium ; upon which question I must beg 
to refer the student to the observations of Mr. Kirby and those suggested 
above. Jn their general outline also, there is a considerable difference, 
* It is material, for the purpose of tracing the affinities subsequently stated, 
to notice this formation ; and a question may arise whether this tumidity is not, 
in fact, the bilobed production of the anterior part of the under side of the 
head, and whether the lower lip and its appendages do not arise between the two 
lobes as in Passandra, &c, Should, however, the mentum be transverse, and 
merely swelled on each side, this circumstance of itself evidently shows an 
approximation to the swelled bilobed formation of the under side of the head 
in those genera. 
