Genera of the Cossonidoe. 571 
(though particularly the front ones) being more approxi- 
mate. Its antennae (which are implanted before the middle 
of the rostrum) are rather thick, with their scape slightly 
abbreviated, and their funiculus (the second joint of which 
is but very little longer than those which follow it) to- 
lerably compact, — though not so compact as in Stereo- 
tribns. 
The genus seems to be peculiar (so far as I am aware) 
to the islands of the Malayan archipelago, — the specimens 
now before me (from the collections of Mr. Fry and 
Mr. Pascoe) having been captured by Mr. Wallace at 
Dorey in New Guinea, and in the islands of Gilolo and 
Matabello. 
89. Stereotribus {nov. gen.'). — The members of the 
present group are very closely allied, in external aspect 
and general structure, to those of the preceding one, — 
from which they seem mainly to differ in their head being 
a little less widened, and their rostrum (which in the 
S. incisus and tuber culifrons, from Ceylon, is rather 
longer, and distinctly narrowed towards the base) being 
not only furnished behind with a very deep, short, wide, 
and somewhat gaping slit, or (as it Avere) gash (often ac- 
companied by posterior frontal tubercles and inequalities), 
wdiicli takes the place of the narrow channel in Stereohorus, 
but likewise more or less bearded beneath, at the apex, 
with elongated hairs. Their eyes, too, are a little more 
pi'ominent ; their funiculus (the second joint of which is 
not at all longer than those which follow it) is more solid, 
or compact ; and the additional lamelliform process Avhich 
augments the inner edge of the two front tibije is armed at 
its base with a very conspicuous and robust spine (which 
is best seen when the insect is viewed obliquely and from 
behind). Like that genus, it is widely spread over the 
islands of the Malayan archipelago, — examples, obtained 
by Mr. Wallace in Batchian and Tondano, having been 
communicated to me by Mr. Pascoe ; and it appears to 
range eastward, in however a slightly modified form (as 
witnessed by its somewhat longer and more posteriorly- 
narrowed rostrum, and its more developed club), to at all 
events Ceylon— from whence several individuals (repre- 
senting my -S'. incisus and tuber culifrons) are now before 
me from the collection of Mr. Fry. 
I have thought it desirable to append a subgeneric title 
TRANS. ENT. SOC. 1873.— PART IV. (OCT.) S S 
