OF BRACHELYTRA. 191 



the anterior margin, within which, on each side, arises a long 

 and curved bristle : the extremity of each lobe formed by this 

 notch is furnished with a very minute appendage, composed 

 distinctly of two joints, the terminal one being very minute and 

 slender : the labial palpi are entirely evanescent. The legs 

 are of a curious structure ; the anterior tibiae are furnished 

 with three short spines or calcaria at the tips, and another on 

 the outside beyond the middle ; the tarsi in all the legs appear 

 only to be three-jointed, the two basal joints being moderately 

 short, and the third longer than the two preceding together; 

 its extremity is armed with several very long erect bristles, as 

 well as with several others accompanying the claws, which are 

 long, slender, and toothed in the centre. The antennae have 

 the two basal joints longer than the rest. 



" It is not without some scruple that I have brought myself 

 to adopt the nomenclature of the parts of the instrumenta 

 lahialia, given above, more especially some in Deinopsis ; there 

 are appendages which might, perhaps, be considered as the 

 true analogues of the labial palpi. The structure of the 

 labium, and its various parts, notwithstanding all that has been 

 written upon it, still requires a philosophical investigation, in 

 order to prove the real representatives of each portion through- 

 out the great variation of form which exists even in the mouth 

 of Coleopterous insects alone, setting aside the other mandi- 

 bulated and all the haustellated orders. By a comparative 

 examination, however, of the mouth of these two genera with 

 the other genera of Brachehjtra, I think we cannot fail to trace 

 the true analogues of these parts. In Hygronoma dimidiata, 

 (Evichson, Kafer der Mark Brandenb. Homalota dimidiata, 

 Curtis, PI. 514,) the labial palpi are present, but the labium 

 or lip, as the latter author indifferently terms it, is ' terminated 

 by a transverse oval lobe, with two divaricating obtuse spines 

 at the centre.' In Callicerus Spencii, (Curtis, PI. 443, $ Homa- 

 lota callicera, Erichson, 9 Callicerus hyhridus, Hali.) the lip is 

 also furnished ' with two small lobes in the centre.' But, in 

 Dinarda dentata, {Lomecktisa dentata, Curtis, PI. 410,) which 

 is most nearly allied to those insects, the lip is ' small, narrow, 

 and bifid, each lobe producing a small glandular appendage.' 

 In all these insects, however, the labial palpi are present. 

 But, in Mr. Haliday's remarkable genus, Diglossa, (Ent. Mag. 

 XVIII. p. 253,) we find a much nearer affinity to these two 



