344 Major F. J. Sidney Parry on the characters 
to assimilate more closely in the following respects: the 
short robust mandibles, which are slightly recurved at the 
apex ; the deeply excavate head, with the sides rounded 
and strongly produced ; the form of the thorax, with its 
anterior trilobate process ; and, finally, the elytra, on 
which the costa are more prominently defined, the sculp- 
ture of the interstices, as well as the punctuation, being 
considerably stronger than in any species pertaining to the 
genus Figulus. N. trilobus belongs to the third section 
of the genus, characterized by the mandibles being simple, 
or unarmed, on their upper surface. 
Figulus. 
Sectional arrancjement. 
The species belonging to the genus Figulus may be 
thus seetionized : — 
A. Elytra smooth, partially striate. F. Icpvljyennis. 
B. pjlytra partially, but irregularly, punctate-striatc. F. snblains. 
C. Elytra regularly punctate-striate. F. striatus, F. regxilaris, 
F. foceicollis, Manillarum, Scarltiformis, and others. 
XIII. Remarks on the affinities of the genus Nicagus, 
Lcconte. By Mons. Henri Dep'olle. Communicated 
in a letter to Major F. J. Sidney Parry, F.L.S. 
" I have availed myself during the past few days of 
certain leisure time to examine your beetle attentively, and 
regret that I am compelled to differ entirely fi-om our 
learned and esteemed fliend Mr. WestAvood,* and find that 
it is impossible to separate Nicagus from the Lucanidce, 
and that I cannot locate it satisfactorily among the Lamel- 
licornia, in whatever group I attempt to place it. 
" It presents one slight differential character, and one 
alone, from the Lucanid<2, namely, the naiTOw mentum, 
but in all other respects it coincides so entirely that I have 
not the shadow of a doubt that the position of Nicagus is 
in close proximity to Mitophgllus. 
" Observe that all its organs correspond with those of 
that group ; take for instance for comparison a female 
specimen of your M. irroratus : the head I find is nearly 
similar; the antenn(B likewise, with the lamellas a trifle 
thicker ; the prothorax agrees in every respect with that 
* Proc. Ent. See, 7 March, 1870. 
