24 Orprer—COLEOPTERA. Section—PENTAMERA. 
Specixs 1 (39)—GENUCHINUS V NOTATUS. 
Puate X, Fic. 4. 
Niger nitidus, supra subdepressus; capite et pronoto punctatis; elytris velutinis cicatricoso-punctatis ; 
capite antice rotundato, margine elevato; prothorace fere circulari disco utrinque biimpresso; elytrorum dorso 
plano, ante medium lineola V irregulari lateribusque lineolis nonnullis transversis luteis notatis. 
Long. corp. lin. 74; lat. humer. elytr. lin. 23. 
Habitat; Mexico (Mus. Berol., olin D. Schaum): Chontales, Nicaragua (D. Belt.): ‘Afr. oceid.?’ 
(D. Parry.) 
Syn. : Genuchus V notatus. Westw. MS. 
Genuchus quadrinotatus. Schaum, Verz. Lam. Melit. p. 63. 
The head is of moderate size, slightly and regularly convex above, with the anterior margin rounded and 
sharply elevated. It is thickly covered with small punctures ; the antenne are black with the basal joint large 
and triangular. The maxill 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 hind 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 line covered with luteous squamosity. The disc is polished and marked with large punctures irregu- 
larly scattered about, and with two slight rounded impressions on each side of the dise forming a square. The 
scutellum is elongate-triangular with the apex acute, it is slightly marked with luteous 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 plush- 
like scales, and on each side are three transverse lineol 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 coxw, forming a sharp, compressed, curved, 
and setose point. The large metasternum is marked with a very fine central longitudinal line. The posterior 
cox 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 coxe are armed on the outside at the 
tip with two teeth, the inner margin being constricted between the teeth. On the underside the fore tibie 
are furnished near the apex with a large depressed lobe or tubercle rounded at its tip, which gives the tibie 
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 I, Fia. 3. 
Niger subnitidus luteo-sparsus ; elytris velutino-costatis cicatricoso-punctatis ; prothorace lateribus rotun- 
datis, angulis anticis porrectis acutis, posticis parum angulato-prominulis, suleo medio longitudinal: ; tibiis anticis 
extus bidentatis, subtus angulato-incrassatis; metasterno utrinque segmentisque abdominalibus gtramineo- 
velutinis nigro-punctatis. 
Long. corp. lin. 5}; lat. humer. elytr. lin. 2}. 
Habitat ; Equador (D. Buckley). In Mus. Parry. 
This species at once differs 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, 
the two next the suture disappearing beyond the middle of the elytra. The head is moderately convex, covered 
with small punctures, the anterior margin thin, rounded, and reflexed. On each side, extending forwards from 
the place of insertion of the antenne, is an oblong depression. The maxilla have the inner lobe terminated by 
