1 
09 
CLAMBUS. 
CLAMBINA. 
CLAMBUS. 
Clambus, Fischer, Ent. Russ. Gen. i. p. 52 (1820). 
Body perfectly contractile. Head very large and flat, with deep antennal grooves on the underside. Thorax 
small, transverse. Elytra large, entire, exceedingly convex. Antenne 9-jointed, 1 rather short and robust, 
2 very long and slender, 3-7 gradually shorter, 8 and 9 forming a much incrassated club. Prosternum 
short; ¢pisterna very small; epimera small, but distinct, not enclosing the coxal cavities; coxal cavities 
moderate, suboblong, with a foramen at the outer extremity, partly closed posteriorly by a dilated process 
of the prosternum. Mesosternum moderate, very deeply excised in front; episterna humeral, long, and 
narrow ; epimera rather large, extending to the coxal cavities ; coxal cavities very large and very oblique, 
elongate-oval, moderately distant. Metasternum rather large, scarcely reaching the sides of the body ; 
episterna long and very narrow, produced anteriorly below the coxal cavities, and almost reaching the 
posterior cox ; epimera very narrow, with their extremities only visible. Venter composed of five nearly 
equal segments. Legs very long and very slender ; tarsi 4-jointed, with the first joint the longest. Coxe: 
anterior large, contingent, and very prominent ; intermediate very long and large, not contingent, promi- 
nent; posterior contingent, very large, extending to the sides of the body, and furnished for their whole 
extent with broad, circularly rounded lamine. 
Numerous species of this genus have been described from Europe, North America, 
the Canary Islands, Ceylon, &c. ; I have to record two from Central America. 
1. Clambus gibbulus. 
Clambus gibbulus, Lec. in Agassiz’s Lake Sup. p. 222; Proc. Ac. Phil. 1853, p. 2861; Horn, Trans. 
Am. Ent. Soe. viil. p. 312’. 
Ovatus, validissime convexus, nigro-piceus, pronoti marginibus late dilutioribus, glaber, nitidissimus; capite 
rufo-piceo, permagno, lato, clypeo valde dilatato, antice rotundato, lateraliter producto; oculis magnis, 
prominentibus; pronoto transverso, quam caput parum longiore et latiore, nigro, lateribus atque basi rufo- 
piceis, glabro, nitidissimo, lateribus valde rotundatis, margine basali rotundata angulis fere obsoletis ; elytris 
semiovatis, quam caput atque pronotum nec longioribus neque latioribus, prope media latissimis, glabris, 
nitidissimis, lateribus leviter marginatis, angulis subhumeralibus sat prominentibus, apice acuminato ; 
pedibus atque antennis longis, gracilibus, late flavis. Long. corp. ~ lin.=1:12 millim. 
Body ovate, exceedingly convex, nigro-piceous, with the sides and base of the thorax broadly pale, not pubes- 
cent, smooth, and very shining. Head rufo-piceous, very large and broad ; clypeus much dilated, rounded 
in front, and much produced at the sides; eyes large and prominent; antenne rather long and slender, 
bright yellow. Thorax transverse, rather longer and broader than the head, smooth and very shining ; 
sides much rounded; basal margin rounded, with the angles almost obsolete. Scutellum moderate, 
triangular. lytra semiovate, not longer nor broader than the head and thorax, widest near the middle, 
smooth and very shining; sides slightly margined, with the subhumeral angles rather prominent; apex 
acuminate. Legs long and slender, bright yellow. 
Hab. Norta America, Canada to Texas?, Michigan !.—Guatema.a, near the city 
(Champion). 
Differs from the following species in its ovate form, longer and broader head and 
thorax, greater dilatation of the clypeus, and paler sides of the thorax. One 
specimen. 
BIOL. CENTR.-AMER., Coleopt., Vol. II. Pt. 1, November 1887. L* 
