84 Mr. G. J. Arrow on the Genus Rhysodes. 
Although the family appears to be represented in every 
part of the world, its geographical distribution has given no 
support whatever to those who have attempted its classifica- 
tion. It is remarkable that, although the European species 
described amount only to five, each of the four genera into 
which the family has been divided is represented among them 
(for Clinidium marginecolle, Reitter, is very near the type of 
Faimaire’s genus Lhysodiastes). The distribution of the 
Rhysodidx, indeed, is altogether highly peculiar, Tropical 
and South America alone seeming to show any individuality 
in its representatives, which belong only to the apterous 
section. The South-American guadristriatus, though hitherto 
remaining in Lhysodes, also belongs to Rhysodiastes, as well 
as Clinidium costatum of Chevrolat (not Guérin, as in 
Mr. Lewis’s catalogue). 
Several other rectifications require to be made in the list of 
species of Idhysodes given by Mr. Lewis. £2. proprius, Broun 
(wrongly quoted “probrius” and referred to p. 215 instead 
of p. 216 in the ‘ Manual of New Zealand Coleoptera ’), must 
be removed to Clinidium. On the other hand, &. pensus, 
Broun, has been incorrectly transferred to the latter genus as 
synonymous with C. arcuatum, Chev. ‘This is evidently a 
mere slip, as there is no connexion between the two. L. pen- 
sus is one of the most easily recognizable species of Rhysodes. 
R. tubericeps, Fairm., has already been announced by its 
author, who was himself responsible for sinking the name, as 
distinct from R. cana/reulatus, Cast. No reference to the last 
species is given by Mr. Lewis; it was described in the 
‘Revue Entomologique,’ vol. iv. p. 56. 
Of the new species described here three are from India, and 
are the first hitherto recorded from that country. The metro- 
polis of the family is evidently the Indian Ocean, where it 
seems the species will ultimately be found very numerous. 
The following table will, I hope, simplify the identification 
of the new forms: to increase its usefulness I have included 
all the species of the genus known to me :— 
Head with lateral lobes approximating before and 
behind; median elevation ending posteriorly 
beyond hind border.........-. «sss eminens, Broun, 
atehind’ border. 224.4 see eeu .... sulcatus, Fabr. 
comes, Lewis. 
before poster1Or Wit can ates: coctwwe ts se strabus, Newm. 
armatus, sp. n. 
crassiusculus, Lewis. 
sbep ele oie Synthese Okiare. 6 malaicus, sp. n. 
batchianus, sp. n. 
nicobarensis, Grouy. 
in posterior pit... 
