178 SCAPHIDIIDA. 
nitidissimis, stria suturali profunda, lateribus vix rotundatis, leviter marginatis, apicibus ferrugineis, 
modice rotundatis; abdomine nigro, apice rufescenti; pedibus modicis, rufis; antennis modicis, rufes- 
centibus, clavis modice incrassatis. Long. corp. 1°50 millim.; lat. 0°75 millim. 
Body oval, convex, very smooth and very shining, deep black. Head short and broad; eyes large, not pro- 
minent ; antenne moderate, rufescent, with the club but slightly incrassated. Thorax moderate, widest 
at the base, very shining and very smooth; sides a little rounded and slightly margined; basal margin 
not sinuated, produced towards the scutellum, with the angles acute and rather produced. Scutellum 
covered by the thorax. lytra rather longer, but not broader than the head and thorax, widest at the 
shoulders, very smooth and very shining ; sutural stria deep ; sides scarcely rounded and slightly margined ; 
extremities ferruginous, moderately rounded. Abdomen black, with the apex rufescent. Legs moderate, 
rufous. Underparts black, with the apex of the venter rufous. 
Hab. Mzxico, Teapa and Frontera in Tabasco (Hége); British Honpuras, R. Hondo 
(Blancaneauz). 
Differs from all our other species in its smooth, very shining, impunctate surface. 
TOXIDIUM. 
Toxidium, Leconte, Proc. Acad. Phil. 1860, p. 324. 
Antenne 11-jointed—1 and 2 rather large ; 3-6 very slender, incrassated on the inner side; 8 not incrassated ; 
9-11 moderately incrassated on the inner side, forming an elongate moniliform club, 11 the longest and 
oval in shape. Mazillary palpi long and slender, 4-jointed—1 minute; 2 and 3 subcylindric, equal ; 
4 very long, acutely acuminate. Labial palpi rather large, distinctly 4-jointed—1, 2, and 3 subquadrate, 
transverse, nearly equal; 4 much longer than 3, and more slender, strongly incurved. Labrum large, 
much dilated, much rounded and broadly transparent at the sides, faintly emarginate in front. Mandibles 
rather long, hooked and bifid at the apex, furnished with a ciliated appendage above the middle. Mazilla 
very robust, bilobed; the outer lobe very broadly dilated towards the apex, with the apex circularly 
rounded, and deeply and strongly pectinated ; the inner lobe rather robust, and armed at the apex with 
long incurved setiform teeth ; stipes very robust. Mentwm elongate, suboblong, widest at the base. Labium 
suboblong, widest in front. Lingua very large and broad, emarginate in front. Prosternwm very small; 
episterna rather large, triangular; epimera very narrow, linear; coxal cavities extending into the meso- 
sternum. Mesosternum large, carinated between the anterior coxe, and produced into a lanciform point ; 
episterna humeral, long, and narrow ; epimera very small, linear, not extending more than halfway to 
the coxal cavities. Metasternwm moderate, not extending to the sides of the body, with the hinder 
margin concave between the coxe; episterna moderate, rather narrow, extending to the coxe; epimera 
narrow, very little inflected beyond the episterna. Venter composed of five segments—1 and 5 long, 2, 3, 
4 short. Legs moderate; tibie spinose; tarsi 5-jointed, 1 the longest. Coxe: anterior prominent and 
contingent; intermediate moderately distant ; posterior very near, not contingent. 
This genus contains five described species, from North America, Japan, &c.; a similar 
number inhabit Mexico or Central America, four of which are here treated as new. 
Epitome of the Species. 
L. c. 2°40 mm. Compressed, elongate, almost impunctate; black, with two in- 
distinct crimson fasciz on the elytra; legs and antenne rufous . . . . . bifasciatum. 
L.c.2mm. Elongate oval, narrow, very shining; elytra deeply punctured, deep . 
black ; legs and antenne long, rufescent . . . . ~ + + « punctatum. 
L.c. 2mm. Compressed, narrow, very shining, almost impunctate, deep black ; legs 
and antenne moderate, rufo-piceous . . . . 2. + © © + + + + + « gammaroides. 
