CLASSIFICATION OF THE RHYNCHOPHOROUS COLEOPTERA. 467 
the peculiar arrangement of the last ventral segment, which is 
prolonged upwards along the whole lateral and apical margin, so 
that the pygidium is confined entirely to the dorsal surface, and, 
as it were, surrounded by this sharp edge. 
The mouth is normal in form, the gular peduncle emarginate, 
the mentum moderate in size, prominent, buccal fissures broad, 
maxille exposed. Mandibles stout, curved, convex on the outer 
face, toothed on the inner side. Beak short, or almost wanting, 
antennz short, geniculate, club usually solid, annulated on one or 
both sides, base usually smooth and corneous for a greater or less 
extent ; rarely (Phiceotribus) the club is lamellated. Eyes usually 
large and transverse. 
Front coxe usually contiguous and subconical, hind coxe large, 
not widely separated ; tibige compressed, usually serrate on the 
outer edge, terminal spur large ; tarsi sub-pentamerous, not spongy 
beneath, 3d joint sometimes narrow, sometimes dilated ; 4th joint 
usually rudimentary, sometimes (Platypus) quite distinct, last joint 
long, claws simple, separate, strong. 
The ventral segments are not very unequal in length, anid the 
suture between the 1st and 2d is straight and well marked, the 5th 
is frequently the longest ; the intercoxal process of the 1st is usu- 
ally acute. 
The dorsal segments are membranous, the pygidium is small 
and horizontal, covered by the elytra: the last spiracle is visible ; 
the lateral upward prolongations of the ventral segments are well 
marked, and furnished with a sharp edge, continued even to the 
tip of the 5th segment. The lateral fold of the elytra is conse- 
quently well marked, the groove narrow and deep, sapere ob- 
literated, but not wider toward the tip. 
Two sub-families are indicated, Platypodide and Seolytide, the 
“Ist with the basal joint of the tarsi very long, and the 4th dis- 
tinct; the latter with the 1st joint shorter than the others united, 
and the 4th joint less developed.* 
The synonymy of our species will probably present much diffi- 
culty, and the number is by no means that indicated by the names 
*On p. 369, of vol. vii of the Genera des Coléopteres, Lacordaire haa alge enti 
tribe E he erigan 
m the apasi by a distinet edge; and the maa m antenne © 
posed of 7 lamellate jo’ al 
I cannot help su ermiton dad these insects have been misplaced. I sought for speci- 
mens in all of the large European collections ‘which I visited, but without success. 
. 
