24 OEDEE—COLEOPTERA. SECTION—PENTAMERA.
SPECIES 1 (39)—GENUCHINUS V NOTATUS.
PLATE S , FIG. 4.
Niger nitidus, supra subdepressus; capite et proiioto punctatis; elytris velutiuis cicatricoso-piinctatis ;
oapite aiitiee rotiindato, marg-iue elevato; protliorace fere cireiilari disco utrinc(ue biiinpresso; elytroriim dorso
plauo, ante medium lineóla V irregular! lateribusque lineolis nomiullis transvcrsis luteis iiotatis.
Long-, corp. lin. ; lat. burner, elj'tr. lin. 2| .
H a b i t a t ; Mexico (Mus. BeroL, olim D. Scbaum) : Choutales, Nicaragua (D. Bolt.): ' Afr. occid. ? '
(D. Parry.)
SYK. : Gemichus V notatus. WESTW. MS.
Genudeus quadrinotatm. Scliaum, Vcrz. Lam. ilelit. p. 63.
The head is of moderate size, slightly and regularly couvex above, with the anterior margin rounded and
sharply elevated. It is thickly covered with small punctures; the antennas are black with the basal joint large
and triangular. The maxillte have a long sickle-shaped apical tooth, and the inner lobe is armed with a shorter
and broader flattened tooth. The mentum is large, covering the front of the head beneath, triangularly
produced at its base, which is rounded, free, and stands out from the jugulum; the fore margin is rounded and
the bind margin is sharply elevated; the middle of the disc is impressed, and it is finely punctured; there
is also a slight impression on each side near the insertion of the palpi. The prothorax is nearly circular, the
fore margin alone being truncated for the reception of the head with the anterior angles acute. The disc is
but very slightly convex, the lateral margins are sharp but not elevated. Within the margin is a slightly
impressed hne covered with luteons squamosity. The disc is pohshed and marked with large punctures irregularly
scattered about, and with two slight rounded impressions on each side of the disc forming a square. The
scutellum is elongate-triangular with the apex acute, it is slightly marked with Inteous scales. The elytra are
elongate, the disc flattened with a distinct costa extending from within the humeral angle of each to the
subapical tubercles. The disc is marked with elongate-oval cicatricose punctures, but at the sides the punctures
are rounded. On the disc, rather before the middle, is an irregular V-shaped mark formed of luteous plushlike
scales, and on each side are three transverse lineóte similarly formed; the apex is marked with similar
dots, as is also the pygidium. The body beneath is black and glossy, covered sparingly with moderate sized
punctures. The prosternum is porrected in front of the anterior coxie, forming a sharpj compressed, curved,
and setose point. Tlie large metasternum is marked with a very fine central longitudinal line. The posterior
coxie and the base of the abdomen are marked with luteous scales, and the basal segments of the latter are
impressed down the centre in the male, the second, third, and fourth segments being raised on each side parallel
with the posterior margin. The legs are of moderate size. The anterior coxte are armed on the outside at the
tip with two teeth, the inner margin being constricted between the teeth. On the underside the fore tibí®
are furnished near the apex with a large depressed lobe or tubercle rounded at its tip, which gives the tibiiB
a triquetrous appearance in this part. The spur on the centre of the four posterior tibia? is sharp and distinct.
SPECIES 2 (40)—GENUCHINUS SULCIPENNIS. Westw.
PLATE II, Fio. 3.
Niger subnitidns hiteo-sparsus; elytris velutino-costatis cicatricoso-punclatis; prothorace lateribus rotundatis,
angulis anticis porrectis acutis, posticis parum angulato-prominulis, sulco medio longitudinali; tibiis anticis
extus bidentatis, subtus angulato-incrassatis; metasterno utrinque segmentisque abdominalibus stramineovelutinis
nigi-o-punctatis.
Long. corp. hn. 5 | ; lat. humer. elytr. lin.
H a b i t a t ; Equador (D. Buckley). In Mus. Parry.
This species at once difix^rs from the others of the genus in the flattened elytra, of a velvety black colour
marked with various straw-coloured patches, each having three moderately raised longitudinal polished ridges,
t h e two next the suture disappearing beyond the middle of the elytra. Tlie head is moderately convex, covered
with small punctures, the anterior margin thin, rounded, and reilexed. On each side, extending forwards from
the place of insertion of the antenna?, is an oblong depression. The maxillic have the inner lobe terminated by
FAMILY—CETONIID.E. SÜB-FAMILY—CREMASTGCIIEILIDES. 25
an obbquely truncated thin tooth. The mentum is broadly ovate, with the entire margin behind the palpi very
slio'htly raised, so as to cause the surface to appear nearly flat when seen horizontally ; the anterior margin is
deflexcd, and the disc marked with striola) 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 sulcus. The scutellum has the transverse base delicately pimetured,
the remainder smooth with the sides elevated. The elytra are long and rather narrow, being widest at tlie
shoulders, which are elevated. The suture and the elevated longitudinal ridges are polished, the disc marked
witli cicatricose punctures, arranged in irregular stria?, 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-colonred 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
tibia; are bidentate at the extremity, and the under surface is dilated into an elongated triangle so as to become
triciuetrous.
SPECIES 3 (41)—GENUGHINUS VELUTINUS. Westw.
PLATE X, FIG. 5.
Niger opacus supra velutinus, albido-sparsus, prothorace fere rotundato, supra eonvexo, lateribus rotundatis
albido-marginatis, angulis posticis rotundis ; capite punctato, pronoti disco cicatricoso-punctato, iuterstitiis
delicatissime grannlatis (fig. 5 i) ; elytris supra depressis, disco punctis oblongis cicatricosis in striis irregularibus
dispositis (fig. 5 c) ; tibiis anticis extus bidentatis, tricpietris, opice interne in lobum angnstum producto.
Long. corp. lin, 7 ; lat. humer. elytr, lin. 3| .
Habitat ; Mexico, In Mus. Parry.
This species is distinguished by its intense black velvety hne, marked rather irregularly with small and rather
pale bufl' patches. The head is covered with minute punctures, with the anterior margin transversely rounded
and elevated. The mentum is more pointed behind (fig-. 5 a), 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 emarg-inate, 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 dccidcd as the anterior, which
gives somewhat a scaly appearance when seen under a lens, the interstices being entirely covered with exceedingly
minut e granulations. The sides of the pronotum are margined with bufli', and there are two small buflTdots
between the middle and the anterior margin. The base of the scutellum is marked with an irregular buif spot.
The epimera are posteriorly margined with buflj'. The elytra are oblong, flat above, velvet black with numerous
small irregular whitish biifl' 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 thicldy marked with large oblong cicatricose punctures, arranged in irregular longitudinal
lines. The anterior tibia; 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 ealcar is fixed. The body
beneath is black and glossy, and punctured rather thickly; the basal segments of the abdomen are longitudinally
depressed in the centre.