526 Mr. T. Vernon AVollaston on the 
the first abdominal segment and greatly abbre\'iated meta- 
sternnm of Amaurorrhinus and the allied groups. 
29. Pentatemnus (Wollaston, Trans. Ent. Soc. Land. 
2nd ser. v. 385. 1861). — In its obsolete scutelkmi and eyes 
(tlie latter of which are very minute and indistinct, being 
composed of only about six small lenses), and its dark 
piceous hue, and the fact of its funiculus being 5-articulate, 
Pentatemnus agrees with Amaurorrhinus ; but it differs 
from it essentially in most of its other details, as well as in its 
subfossorial mode of life. Thus, not only is its body (in- 
stead of being bald) sparingly studded with elongate silken 
hairs, but its elytra and under-surface are curiously and 
thickly asperated with obliquely-impinged punctures, its 
rostrum and antenna? (the former of which is more strictly 
parallel, and the latter are more medially inserted) are 
much shorter and thicker, its legs are considerably more 
incrassated, and its third tarsal joint is simple. Its tibial 
hooks too are vein/ much more developed, — the four hinder 
ones being exceedingly powerful, and rather expanded, and 
compressed, at their base, causing the tibiaj. to seem as 
though slightly rounded-outwards at their external angle. 
The Pentatemni are sand-infesting, and somewhat fossorial, 
in their habits (as indeed their pilose bodies, obsolete eyes, 
and strongly-developed legs and tibial hooks would par- 
tially imply), residing around the roots of shrubby plants 
which stud the arid tracts of loose, drifting sand in certain 
islands of the Canarian and Cape- Verde archi])elagos, — 
where they often descend to a considerable depth beneath 
the surface. In such situations I have met Avith them in 
Lanzarote, Fuerteventura and Grand Canary of the for- 
mer, and in Sao Vicente of the latter. 
30. ILvLORHYNCnus {nov. gen.). — The insect for Avhich 
the present genus has been proposed is fi-om the collection 
of Mr. Pascoe, by whom it Avas receiA'ed from Freemantle 
in Western Australia ; and it is perhaps the most impor- 
tant of all the forms Avhich he has communicated to me, — 
as establishing most completely the manifest relationship 
Avhich exists (of which, despite the opinion of Lacordaire, 
I haA'e never myself entertained the slightest doubt) be- 
tAveen the Pentarthrides and that singular de|)artment of 
aberrant, fossorial Cossonids, to receive which I have 
established the subflimily Onycholipides. Indeed so much 
has it in common Avitli Onycholips {yv'iih. AA'hich it also 
