576 Mr. T. Vernon Wollaston on the 
which are perfectly parallel, and are likewise very straightly 
truncated in front), and in its rostrum being rather long 
and robust, but of eqvial breadth throughout, in its eyes 
being very largely developed, in its elytra being separately 
recurved at their extreme apex, in its third tarsal joint 
being small and almost simple, and in its four anterior 
00X03 being very widely and subequally distant, whilst the 
posterior ones are, if anything, even less remote than the 
others, — a character which is most unusual amongst the 
Cossonids. The examples now before me (all of Avliich 
seem to pertain to a single species) are from the collection 
of Mr. Pascoe, and Avere captured by jNIr. "Wallace at 
Dorey in New Guinea, as well as in 13atchian, Makian, 
and Ceram. 
96. Macrorhtncolus (Wollaston, Trans. Ent. Soc. 
Lond. 33. 1873). — The present genus, which I estab- 
lished a short time ago to receive a Cossonid which was 
obtained by JNIr. G. Lewis in Japan, and of Avhicli a 
second species (from Ceylon) is now before me, communi- 
cated by Mr. Fry, is somewhat intermediate between the 
preceding groups and Rhi/ncolus ; nevertheless I believe 
that it is, in reality, far more nearly allied to the former 
than to the latter. From Rhyjicolus it differs, principally, 
in the body being relatively longer, narrower, and more 
parallel, — it being less coiivex, and without any tendency 
to be ovate (or expanded behind the middle); and its 
surface is more shining, and of an intenser black. Its 
rostrum is more strictly parallel, — being indeed, if any- 
thing, rather contracted, perhaps, than otherwise, towards 
the base (instead of, as in the Rhj/ncoU, somewhat thick- 
ened) ; its eyes are larger and more prominent ; its pro- 
thovax and metasternum are more elongated ; its club 
(although small ) is both less narrowed and less acuminate ; 
and its four anterior coxge are a little more remote. 
97. Heterarthus (Wollaston, Trans. Ent. Soc. 
Lond. 29. 1873). — It was for tAvo very closely related 
species which were captured by ]Mr. G. Lewis in Japan 
that I lately established the genus Heterarthrns ; and a 
third is now before me, fi'om the collections of jNIr. Pascoe 
and Mr. Janson, from the same region, — it having been 
taken near Nagasaki, in the island of Kushiu. They 
may be known from the members of the neigliboiu-ing 
groups by their convex and fusiform bodies having the 
