Genera of the Cossonid(2. 5G9 
first sight of a minute Tenehrio ; and although it is mani- 
festly much allied to Cossonus, I feel satisfied that it can- 
not be admitted amongst the numerous specific modifi- 
cations of that extensive group. Thus, not only is its 
opake upper-sui"face sparingly besprinkled with very short 
and minute fulvescent seta3 (a circumstance of great signi- 
ficance in this particular department of the present family), 
but its head is considerably broader and more developed, 
with the eyes (which are rounder and more prominent) 
consequently much more remotely separated ; its rostrum 
likewise is wider, shorter, and more parallel (it being 
merely a trifle narrowed, and gi-adually so, behind), its 
prothorax (which is relatively more abbreviated and more 
oval) is* very coarsely, densely, and uniformly punctured 
all over, but unimpressed (although sub-carinulated) pos- 
teriorily, and its legs (the intermediate ones of which are 
extremely wide apart) have their femora (the four hinder 
ones of which are less clavate), their tibias (which are 
slightly flexuose), and their tarsi, each of them, propor- 
tionately, more elongated. 
86. BoEOPPiLCEUS {nov. gen.). — The members of the 
present genus, which appear to be North-American (one 
of them having been communicated by Mr. Fry as coming 
from Mexico, and the other by Mr. Janson), are, I sus- 
pect, in most collections treated as small Cossoni ; never- 
theless it seems to me to be scarcely possible to refer them 
to Cossonus, as rigidly defined, — from which they differ, 
not only in their rostrum being relatively shorter, broader, 
and nearly parallel (indeed completely so as regards one 
of the species), but also in their eyes being larger, rounder, 
more prominent, and more widely separated, in their pro- 
thorax being more equally and closely (though very 
coarsely) punctured, and unimpressed behind, in their 
metasternum being longer, their coxae more approximate, 
and the thml joint of their feet less decidedly simple (it 
being, although very minutely so, sub-bilobed). 
87. Pachytrogus {nov. gen.). — The afiinities of this 
genus, which is founded on an insect fr-om Chili com- 
municated by Mr. Janson, are extremely difficult ; for 
whilst the large size and robust general aspect of its type, 
in conjunction with its somewhat shortened scape, is at 
first sight entirely suggestive of Stereohorus and Stereo- 
trihus. its still thicker and broader rostrum (the tendency 
