Cossonidcs of Japan. 7 
and consequently at a rather higher latitude than the area 
which was explored by Mr. Lewis. The Pentarthrum 
itself is peculiarly interesting, since the only two exponents 
of its group which had hitherto been brought to light are 
(respectively) from England and the island of Ascension ; 
and I have remarked, in the proper place, on the affinity 
which it possesses, both in structure and habits, with those 
two species. 
Amongst the Cossonides proper, Pholidoforus is un- 
usually aberrant on account of the roljust scales (so familiar, 
and ordinary, in certain other departments of the Rhynclio- 
phora) with which it is clothed; and Xenomimetes is note- 
worthy from representing, as it seems to me, in Japan, the 
genus JEremotes (or Syntomocerus) Avhich infests the pine 
trees of the Canarian archipelago. Spharocorynes intro- 
duces us to another s?<6-Hylastideous form ( yet neverthe- 
less strictly Curculionideous), of a very marked character ; 
whilst Stenoscelis, which is still nearer to the HylastidcB 
(being indeed the nearest to that family of all known 
Rhynchophorous types), has an interest, from a geo- 
graphical point of view, emphatically its own, on account 
of the single exponent as yet described (the S. hylastoides, 
Woll., Journ. of Ent. i. 142, t. 11, f. 1) being a native of 
St. Helena and the Cape of Good Hope. Indeed Steno- 
scelis, Pentarthrum and Hexarthrum are the only genera, 
out of the 15 enumerated in this paper, which do not 
appear to be absolutely new. 
In order to make the various forms, and their classifica- 
tion, intelligible, I have compiled, as a slight aid to the 
eye, the following tabular synopsis : — 
Sectio Rhynchophora. 
Fam. Cossonidce. 
a. Funiculus i-art Subf am. Dryophthorides. 
Genus 1. (Coi-pus parallelo-fusiforme, opacum, grosis- 
sime sculpturatum, parce lutosum) . . Tetratemnus. 
b. Funiculus 5-art Subf am. Pentarthrides. 
Genus 2. (Corpus breviter parallelo-oblongum, opa- 
cum, grosse sculpturatum, parce lutosum ). Pcntacoptus. 
Genus 3. (Corpus angustum, subcylindricum, subniti- 
dum, calvum) . . . . . . . . Pentarthrum. 
Genus 4. (Corpus oblongo-ellipticum, latum, nitidius- 
culum, calvum; rostro gracillimo; protbo- 
race transverse; metasterno breviusculo) . Tychlodcs. 
