76 MONOGRAPH OF THE COLEOPTEROUS FAMILY PAUSSID A. 
blable au palpe maxillaire interne d'un Carabique ou Hydro- 
canthare. Les autres parties de la machoire forment le palpe 
maxillaire.” 
It is due to Dr. Burmeister to state, that the supposed articula- 
tion of this style in Platyrhopalus Melleii, as figured by me in the 
Entomological Transactions (vol. x. 1. pl. fig. 4 c) is apparent only 
and not real; my notes state it to have been a flat slender appen- 
dage “which was twisted in the middle, but not articulated. In 
the other maxilla, I did not discover it in this position, but after 
removing the maxilla, I found it lying loose upon one of the 
mandibles.” It is the more necessary to make this statement, 
because Dr. Burmeister, in his comparison of the structure of the 
Paussidze and Carabidee, has more especially considered this sup- 
posed biarticulated structure, as well as the equally supposed 
dilated hood-like form of the labial palpi in Pentaplatarthrus, as 
precisely analogous to the Carabideous and Cychrideous structure. 
‘“*On nyYobjectera,”’ he observes, ‘‘ que le palpe intérieur de Paus- 
sides est inarticulé, et le palpe des Carabiques biarticulé ; mais j’ai 
déja montré que quelques genres des Paussides, comme le Platyrho- 
palus Melleii, Westw. (qui forme un genre particulier et n’est 
pas un vrai Platyrhopalus) ont des palpes maxillaires internes 
tri-[bi]-articulés; et l’on voit que ce meme palpe chez le Pentaplatar- 
thrus Paussoides, d’aprés la figure de M. Westwood, (Linn. Trans. 
xvi. pl. xxxiii., fig. 7 c) est dilaté en forme de capuchon, et couvre 
le mando,* comme dans le genre Cychrus, et les congénéres chez 
les Carabiques.” 
The interest excited by these singular details led me to reinves- 
tigate the structure of the trophi of Platyrhopalus denticornis, the 
result of which is before the student in the lower series of figures 
in the accompanying Plate; and which differ in several respects 
from Dr. Burmeister’s descriptions. Without attempting to refer 
the basal portions of the maxilla marked in this and the other 
plates of the Paussidee with the marks * and + to the typical 
structure of the Coleopterous maxilla, I shall merely observe 
* The part which in Pentaplatarthrus Dr. Burmeister has regarded as a dilated labial palpus, is 
in fact the real mando; since there is nothing in my figure to which he refers, to indicate a 
separation between the part which he considers to be the mando, and the basal portion or stipes. 
Hence two of his proofs of affinity between the Pausside and Carabide are shown to be 
untenable. 
