538 Mr. T. Vernon Wollastou on the 
and of a greenish-brassy tint, — somewhat resembling, at 
first sight, according to Lacordaire, my Pentarthrideous 
Acanthomerus conicullis, of St. Helena. It appears to be 
very slightly sculptured anteriorly, but with the elytra 
longitudinally punctured (the punctures being large in 
front, but evanescent behind) ; its rostrum is said to be 
short and cylindrical, Avith the antennae (which are slender) 
inserted at about the middle point ; its anterior cox^e are 
but feebly apart, and the third joint of its feet is large and 
bilobed.] 
41. CAULOTRuns (Wollaston, Ins. 3Iad. 308. 1854). 
— In a paper which I published, in 1861, on the ' Atlantic 
Cossonides,' I expressed a doubt {vide Trans. Ent. Soc. 
Lond. V. 375) as to whether Caulotrnpis should be re- 
garded as more, in reality, than a slight geographical 
phasis of Pliheophagus peculiar to the Madeiran archi- 
pelago ; and Lacordaire, taking advantage of this hesita- 
tion on my part, did not scruple to cite it ( Gen. des Col. 
vii, 342) as absolutely identical with that group. Yet a 
more critical inspection of it than I had formerly been able 
to bestow has convinced me, as at first, that it Avill be 
better to treat it as generically distinct, — more especially 
since the presence, at the same time, of PJiIceophar/us 
proper in the Madeiran islands would seem to imply that 
it can scarcely be a local development, at all events, of 
that widely-spread tNpe. INIoreover the Caulotrupidcs 
]ilay so im])ortant a part in the Rhynchophorous fauna of 
jNIadeira, where they attach themselves principally to the 
old and decaying stalks of various shrubby plants (though 
a few of them occur likewise beneath the bark of timber 
trees), that there is an additional advantage in keeping 
them separate ; and it is Avith the greater satisfaction 
therefore that I am able to detect certain structural cha- 
racters Avhich I cannot but think, however small when 
taken separately into account, must fully warrant, when 
combined, my original conclusions with respect to them. 
The Caulotrupides have a peculiar asjiect, Avhich, when 
once seen, can scarcely • fail to distinguish them, even 
prima facie, from the Plilcjeophofji. Thus they are more 
ellij)tical, or fusiform, in outline, much more lightly sculp- 
tured (particularly as regards their prothorax), and have, 
most of them, a greater or less tendency for a metallic 
lustre, — the terebrans, Chevrolatii and conicollis being 
completely brassy. Yet, in spite of this, their surface 
