73 
PLATE LXVIII. 
MONOGRAPH OF THE COLEOPTEROUS FAMILY PAUSSID^E. 
- ♦ - 
(Part III.) 
The insects belonging to this curious famih^ which remain to be 
described in the present monograph, are distinguished from all 
those described in the two preceding papers (except Hylotorus 
Bucephalus) by apparently possessing only two distinct joints in 
the antennss ^ the second of which is very large and irregular in 
its construction, occasionally exhibiting the appearance of constric¬ 
tions, apparently indicating the situation of articulations. This is 
the case, for example, in a transverse impression near the base of 
the great joint, in the species figured in the upper part of the 
accompanying plate, as well as in Platyrhopalus aplustrifer ; 
whilst the indentations along the hinder margin of the same 
joint, in some of the species of Paussus, may also, perhaps, be 
considered as indicating the same rudimeutal articulation. From 
Hylotorus, the species remaining to be described are distinguished 
by the possession of a narrow contraction of the head behind the 
eyes, forming a kind of neck, and by the want of the two ocelli, 
or ocelli-like tubercles, on the crown of the head. 
These species, from the construction of the labial palpi, form 
two generic groups : one (containing the old types of the genus, 
and therefore retaining the old generic name, Paussus) having the 
terminal joint of the labial palpi very long and slender, and the 
two basal joints small ; and the other having the two terminal 
joints of equal length, and generally possessing a lai-ge, broad, and 
subdepressed club to the antcnnie, Avhence, upon the separation of 
this group from the former, in my paper in the Linnsean Trans¬ 
actions, 1 applied to it the generic name of Platyrhopalus. It is to 
this genus that our attention is now to be directed. 
PLATYRHOPALUS, IVeslw. 
(Tiiiiis. Limi. Soc. Lond. vol. It), p. 654.) 
Corpus depicssuin. Caput thoiucc tulnus, poncctiiin subquadiatum, postice in colJum bicve 
contractum. Ocull magrii piominuli hiLcialcs. Labritm sub-scmicirculare tciiue setis 
diiabus anticc instrucliitn (Hg. 1 c). AfandiOultc coincje tenuissima? valde arcuatae apice 
in dentem acutissimum tcrniinalo, inlcrne uni- vel bi-dentata?; membrunaque tenui sub- 
