74 
SILPHID., 
2. Clambus exiguus, sp. n. 
Ovalis, validissime convexus, niger, angulis posterioribus pronoti sat late dilutioribus, glaber, nitidissimus ; 
capite magno, sat longo, clypeo antice valde rotundato, lateraliter haud dilatato ; oculis sat parvis ; pronoto 
parvo, brevi, quam caput parum breviore et latiore, ad basin latissimo, lateribus rotundatis, margine basali 
fere recta angulis sat obtusis ; elytris semiovalibus, quam caput atque pronotum parum longioribus, haud 
latioribus, ante media latissimis, leviter et indistinctissime punctatis, angulis subhumeralibus sat pro- 
minentibus, apice obtuso; pedibus atque antennis modicis, gracilibus, lete flavis, harum clavis parum 
obscurioribus. Long. corp. 8 lin.=1-:0 millim. 
Body oval, exceedingly convex, black, with the hinder angles of the thorax broadly pale, smooth and very 
shining. Head large and rather long, with the clypeus much rounded in front, but not dilated laterally ; 
eyes rather small ; antenne moderate, slender, bright yellow, with the club rather darker. Thorax small 
and very short, rather shorter and broader than the head, widest at the base; sides rounded; basal margin 
nearly straight, with the angles rather obtuse. Scutellwm rather small, triangular. Llytra semioval, 
rather longer but not broader than the head and thorax, widest before the middle, slightly and very in- 
distinctly punctured, very shining; subhumeral angles distinct; apex obtuse. Legs moderate, slender, 
bright yellow. Underparts piceous, with the mouth yellow. 
Hab. Guatemata, San Gerénimo (Champion). One example. 
Differs from C. gibbulus in its smaller size, longer head, much shorter and smaller 
thorax, and obtuse apex of the elytra. 
ANISOTOMINA. 
AGATHIDIUM. 
Ayathidium, Uliger, Kugel. Verz. Kaf. Preuss. p. 81 (1798). 
Body either wholly or partially contractile. Head large and flat, with deep antennal grooves on the under- 
side. Thorax generally large, transverse, and very convex, often much dilated and rounded at the sides, 
the base much rounded and incumbent on the shoulders of the elytra. lytra entire, exceedingly convex. 
Antenne arising beneath the frontal plate, 11-jointed, 1 and 2 large, 8-11 forming a much incrassated 
club. Prosternum very small and short ; episterna small, triangular ; epimera moderate, not enclosing the 
coxal cavities ; coxal cavities large and contingent, open both in front and behind, with a large foramen 
at the outer extremities. Mesosternum moderate, very deeply excised anteriorly ; episterna humeral, long, 
and narrow ; epimera rather large, reaching to the coxal cavities ; coxal cavities oblique, very large and 
very long, moderately distant. Metasternum short, nearly extending to the sides of body ; episterna long 
and narrow, not reaching to the coxe ; epimera long and narrow, extending to the coxe ; coxe very long 
and large, nearly reaching to the sides, almost contingent. Venter composed of six segments, with the 
apical segment very small. Cove: anterior contingent, large, and prominent ; intermedzate not contingent, 
very large and prominent; posterior almost contingent, very large and long. TYarsi in the male 5-, 4-, 
4-jointed, in the female 4-, 4-, 4-jointed. 
This well-known genus contains a large number of described species, nearly all of 
which are from Europe and temperate North America; five species are now recorded 
from Mexico or Guatemala. 
1. Agathidium oniscoides. 
Agutiidium oniscoides, Beauv. Ins. Afr. et Amér. p. 160, t. 6. f.2'; Lec. Proc. Ac. Phil. 1853, 
p- 285”. 
Agathidium piceum, Melsh. Proce. Ac. Phil. ii. p. 108 (1844) * (nec Erichs.). 
