Famity—CETONIIDA. Sus-Fam1ty—CREMASTOCHEILIDES. 25 
an obliquely truncated thin tooth. The mentum is broadly ovate, with the entire margin behind the palpi very 
. slightly raised, so as to cause the surface to appear nearly flat when seen horizontally ; the anterior margin is 
deflexed, and the dise marked with striole arranged circularly. The prothorax is rather wider than the head, 
the lateral margins being rounded, the greatest width being rather behind the middle; the anterior angles are 
acute and rather prominent, the hind margin is rounded and separated from the lateral ones by the posterior 
angles being rather slightly angulated. The disc is smooth, rather convex, with large punctures scattered 
wide apart, and with a central longitudinal suleus. The scutellum has the transverse base delicately punctured, 
the remainder smooth with the sides elevated. The elytra are long and rather narrow, being. widest at the 
shoulders, which are elevated. The suture and the elevated longitudinal ridges are polished, the dise marked 
with cicatricose punctures, arranged in irregular striz, and the sides and apex with small rounded punctures not 
sharply defined. The silky markings on the elytra are not quite regular, the chief consisting of two transverse 
spots near the suture before, and two larger ones near the outer margin beyond, the middle. The pygidium 
is covered with luteous pile. The body beneath is black and glossy, moderately punctured. The sides of the 
metasternum, and the whole of the second and the base and sides of the third and two following segments of 
the abdomen are clothed with straw-coloured pile with black punctures. The basal segments are very slightly 
longitudinally impressed, but the third and fourth are rather transversely swollen on each side. The fore 
tibie are bidentate at the extremity, and the under surface is dilated into an elongated triangle so as to become 
triquetrous. 
Specres 3 (41)—GENUCHINUS VELUTINUS. Westw. 
Puate X, Fic. 5. 
Niger opacus supra velutinus, albido-sparsus, prothorace fere rotundato, supra convexo, lateribus rotundatis 
albido-marginatis, angulis posticis rotundis; capite punctato, pronoti disco cicafricoso-punctato, interstitiis 
delicatissime granulatis (fig. 52); elytris supra depressis, disco punctis oblongis cicatricosis in striis irregu- 
laribus dispositis (fig. 5c) ; tibiis anticis extus bidentatis, triquetris, apice interno in lobum angustum producto. 
Long. corp. lin. 7; lat. humer. elytr. lin. 23. 
Habitat; Mexico. In Mus. Parry. 
This species is distinguished by its intense black velvety hue, marked rather irregularly with small and rather 
pale buff patches. The head is covered with minute punctures, with the anterior margin transversely rounded 
and elevated. The mentum is more pointed behind (fig. 5a), and the sides are raised behind the insertion of 
the palpi. The prothorax is nearly rounded, the posterior angles not being in the least prominent, the anterior 
angles are slightly porrected, the front margin, seen from the front, being emarginate, but when seen from 
above, its convexity causes it to appear rounded as in the figure. The whole surface is covered with more or 
less distinctly cicatricose punctures, of each of which the hinder margin is not so decided as the anterior, which 
gives somewhat a scaly appearance when seen under a lens, the interstices being entirely covered with exceed- 
ingly minute granulations. The sides of the pronotum are margined with buff, and there are two small buff dots 
between the middle and the anterior margin. The base of the scutellum is marked with an irregular buff spot. 
The epimera are posteriorly margined with buff. The elytra are oblong, flat above, velvet black with numerous 
small irregular whitish buff marks, of which the most conspicuous are a slender irregular broken transverse 
series across the middle, preceded by another nearly opposite the extremity of the scutellum, and an angulated 
one near the lateral margins towards the extremity. The apex of the elytra and the pygidium are similarly 
dotted. The elytra are thickly marked with large oblong cicatricose punctures, arranged in irregular longi- 
tudinal lines. ‘The anterior tibiae are triquetrous, the under side being produced into a long triangular lobe, 
pointed at its extremity, beneath the base of the tarsus; the outer extremity is bidentate, but the inner is 
produced into a narrow flattened oblique lobe, at the extremity of which the single calear is fixed. The body 
beneath is black and glossy, and punctured rather thickly ; the basal segments of the abdomen are longitu- 
dinally depressed in the centre. 
