Famity—CETONIID. Sus-FAamity—CREMASTOCHEILIDES. 55 
The under side of the front and middle parts of the head are represented in fig. 24, shewing the large mentum, 
with its dilated rounded sides, and the deflexed setose spine in front of the prosternum. Fig. 2d, the mentum, 
seen from behind, shewing the narrowed base, which is concealed when at rest by the dilated hind margin of the 
disc. The labial palpi have the last joint long and curved. 
Plate XI, fig. 2, represents a specimen in the Hopeian Collection, from Brazil. It has the disc of the elytra 
glossy, and the ventral surface of the abdomen quite convex. A similar specimen (except that the head is more 
conical in front, and produced into two more decided erect points) from Equador is also contained in the Hopeian 
Collection, and one from the Upper Amazons is in the collection of W. W. Saunders, Esq. In the former collec- 
tion are also contained several specimens from Equador and the Amazons, all with the dise of the elytra 
polished, and each marked with a large orange-red patch (Cyclidius Nero). These have also the ventral surface 
of the abdomen quite convex, and the front of the head still more conically elevated, with the extremity pro- 
duced into two erect conical points (fig. 3a*). The legs are thicker, and the fore legs have the inner margin of 
the tibize produced near the middle into an obtuse lobe (fig. 34%). These are of a larger size (varying in length 
from 13 to 15 lines) than the entirely black specimens mentioned above, and, from the increased development of 
the frontal horn and lobe of the fore legs, might be supposed to be males. 
Two specimens in the Collection of W. W. Saunders, Esq., from Colombia, differ from all the rest, in their 
smaller size (10 to 12 lines), and in having the elytra entirely velvety black (the seutellum alone glossy). They 
have the head produced and elevated but very slightly in front, as in the first of the above described specimens, 
with which in other respects they quite agree. The larger of these two specimens has the legs more robust than 
the smaller, the larger one being, as I suppose, the male, although the abdomen is convex; each of the second, 
third, and fourth segments is, however, marked with a very minute central longitudinal impression, not visible 
in the other specimen. 
Srrecres 3 (84)—CYCLIDIUS LACORDAIREI. 
Prare XI, Fie. 3. 
Robustus, niger; capitis clypeo conico, in cornu erecto parum clavato, apice obtuso producto; prothorace 
magno convexo, lateribus rotundatis; elytrorum disco nitido; pedibus crassis, femoribus anticis clavatis, antice 
bi-incisis ; tibiis anticis extus subinermibus, intus pone medium in spinam obtusam transversam productis ; 
tibiis 4: posticis ecalcaratis ; tarsis posticis longioribus. 
Long. corp. lin, 15. 
Habitat; Peru. In Mus. Hopeiano Oxoniz. 
Syn. : Cyclidius Lacordairet. Thomson, Mus. Scient. 1860, 1, p. 37. 
Cychdius elongatus (mas). Lacordaire, Gen. des Coléopt. v. iii. p. 533, Atlas, pl. XXXIX, fig. 3, (nec 
Gory et Perch.) 
I have here given a figure of an entirely black specimen in the Hopeian Collection from Peru, 15 lines 
long, which differs from all the specimens of C. elongatus above described in its decidedly more robust form : 
the head is much more conical in front, and elevated into a slightly dilated and obtuse horn (fig. 3a); the pro- 
thorax is larger and much more convex; the dise of the elytra is glossy ; the legs are robust; the teeth on the 
outer margin of the anterior tibiz seem to have been worn away ; the lobe on their inner side is very large, 
and the tarsi, especially of the four hind feet, are decidedly longer than in C. elongatus. Fig. 3 represents the 
maxillz, 3c the mentum, and 3¢ the anterior tarsus of this species. 
Genus 24—CYCLIDINUS. 
Corpus oblongo-ovatum, subconvexum, omnino obscurum; caput mediocre convexum; clypeo margine 
antico parum reflexo, angulis lateralibus rotundis deflexis (pl. XI, fig. 4a); antennarum articulus basalis 
magnus, trigonus ; mandibularum pars externa cornea magna curyata apice acuta, partem internam membra- 
naceam multo excedente ; maxillarum galea curvata apice acuto integro; mandonis lobo apicali parvo curvato ; 
apice acuto, obliquo, angulo basali in spinam parvam producto (fig. 44); mentum parte externa maxima 
obeonica transversa, lateribus rotundatis, disco concavo, basi obtuse in cornu deflexum sub jugulo retro producta 
