Genera of the Cossonidcp. 527 
agrees in its total freedom from even the rudiments of 
eyes) that I had at first sight supposed it to be a member 
of that actual genus ; nevertheless its 5-jointed funiculus, 
parallel outline and obsolete scutellum, in conjunction Avith 
its less completely approximated four anterior legs and 
the structure of its abdominal segments and tibite, shoAv it 
to belong unmistakeably to that particular section of the 
Pentarthrides which contains Pentatemnus. In point of 
fact it is very intimately allied to the latter genus^ — from 
which it nevertheless recedes in its eyes being altogether 
absent, in its tibite being armed at their inner angle (as in 
Lipommata) with a distinct spinule, and in the two hinder 
ones ha\dng their apical hook reduced in size and almost 
sjnniform, in its four anterior tarsi being more narrow and 
linear, whilst the hinder pair are comparatively robust, and 
in its claws being so exceedingly minute as to be barely 
traceable even beneath the microscope. In its general 
outline and sculpture, as well as in its rather paUid hue, it 
is exactly intermediate between Pentatemnus and Ony- 
choIips,—a, fact which is equally borne-out by its nearly 
rudimentary ungues, and the somewhat spiniform struc- 
ture of its hinder tibial unci. 
In its prothorax being appreciably narrower than the 
elytra, as well as in its inner tibial angle being produced 
into a very evident, robust spinule, and in its eyes being 
totally absent, Halorijhnchus embodies some of the most 
characteristic features, likewise, oi Lipommata (in the true 
Cosso7iides), — thus bearing still further testimony to that 
strange and mysterious resemblance Avhich seems, as it 
were, to bind together the ivhole of these immediate pilose, 
posteriorly -asperated, fossorial, sand-infesting forms, in the 
three subfamilies Pentarthrides, Onycholijndes, and Cos- 
sonides. 
31. Georrhynchus (Roelofs, Ann. Soc. Belg. x. 241. 
1866 ; and xi. 78. 1867).— I am indebted to M. Roelofs, 
of Brussels, for the opportunity of examining his unique 
type of the very curious insect (captured near Montevideo, 
in South America) for the reception of which he established 
the present genus ; and although I will not venture to re- 
cord more than a desultory opinion concerning its affinities, 
which Lacordaire {vide Gen. vii. 348, note) and others 
have justly regarded as very obscure ; yet, after a careful 
examination of its several parts, I cannot but think that it 
