Mr. Westwood on the Affinities of Clinidium. 215 
Colecptera, ) and the attempt which I have made to render the structure of 
already described insects more fully known, will be held a sufficient re= 
compence for the want of novelty. 
In tracing affinities, perhaps, no organs are of such essential import- 
ance as the trophi, and it is consequently to be regretted, that as Mr. 
Kirby’s specimen of 
CLINIDIUM GUILDINGII. 
was not dissected, some of the most material parts of the mouth remain 
uninvestigated. I beg, however, to call the student’s attention to the 
characters given by Mr. Kirby of the mandibles, terminal joint of the 
maxillary palpi, and especially the “‘ Mentum latum, utrinque tumi- 
“* dum,” and the delineation of this latter organ in Plate II. fig. 2.. The 
apterous body which is not depressed, the apparent want of reticulated 
eyes, and the levigated spaces regarded by Mr. Kirby as their répresenta- 
tives, the formation of the tips of the tibie, and the pentamerous tarsi, are 
also characters which the student willnot failto consider worthy of attention: 
After the observations of Mr. Kirby on its want of affinity with the 
families referred to in his paper, it was with pleasure that I received an 
insect from Germany, singularly enough on the very day on which the 
account of the Clinidiwm Guildingii was published, which, even upon a’ 
casual examination, appears to bear so great an affinity to that insect, 
that I have little doubt that the time is not long passed when they would 
both have been even considered referable to the same genus. It is equally - 
singular that the situation of the former insect has hitherto equally’ 
been matter of doubt with the authors who have noticed it. 
The insect to which I refer is the 
RHYSODES EXARATUS, 
Tas. Supp. xvi, fig. 1. 
The | genus was proposed (but not described) by Latreille, and adopted 
by Illiger, Gyllenhal, Sturm, and other authors ; but it was reserved for 
Dalman to give in the Analecta Entomologica, p. 93, an elaborate and 
detailed account of the interesting insect composing the genus. This de- 
escription being unaccompanied by any figure, and the insect not having: 
been elsewhere figured,* I feel convinced that a representation of it will. 
not be considered an uninteresting accompaniment to Mr. Kirby’s figure 
of Clinidium. There are, however, certain material characters not suffi- 
* See Note A, 
