SISENES.—VODOMARUWUS. 143 
what prominent, the disc with two large deep oblique grooves on each side and traces of a median ridge, 
the base grooved within and with prominent margin, the surface densely and finely punctured; elytra ( 9) 
long, flattened on the disc, widening to far beyond the middle, the surface very densely punctured, each 
elytron with four fine coste (the first not reaching the apex, the second and fourth confluent immediately 
before the apex and enclosing the third, the latter short, much less distinct, and in a line with the 
shoulder), the suture also raised, the apices obtuse and divergent; beneath very finely and closely punc- 
tured and pubescent, black with an sneous lustre, the flanks of the prothorax bright violaceous ; legs 
black, comparatively stout, the penultimate joint of the tarsi tomentose beneath. 
Length 94 millim. (9.) 
Hab. Nicaragua, Chontales (Janson). 
One specimen only of ‘this very distinct species has been received. Larger and 
broader than the corresponding sex of S. méimetes; the thorax broader than long, and 
with two deep oblique grooves on each side of the disc; the elytra with an additional 
costa on each; the upper surface differently coloured. Specimens of a closely allied 
species from the Amazons are contained in Mr. F. Bates’s collection *, 
VODOMARUS. 
Last joint of the maxillary palpi oblong-ovate, narrow, the apex obliquely truncate, that of the labial palpi 
oblong-ovate; mandibles deeply cleft at the apex; mentum strongly transverse; head moderately 
produced in front; eyes entire (the inner edge not sinuate or emarginate), oblong-oval, lateral, very finely 
granulated, moderately large; antenne slender, filiform, moderately long, 11-jointed,—1 and 3 about 
equal in length, 2 not quite half the length of 3, 3 and the following joints subequal ; prothorax trans- 
verse; elytra moderately long, very gradually narrowing from the base, without raised or impressed lines 
on the disc, completely covering the wings, the apices obtuse and somewhat divergent; legs slender, the 
femora not dilated in the male ; tibial spurs short; claws sharply toothed within near the base. 
A single species from Central America is referred to this genus. Vodomarus 
approaches the Old-World genus demera, but differs from it in the oblong-ovate and 
shorter apical joint of the maxillary palpi, less subulate elytra, less elongate antenne, 
the first and third joints of which are about equal in length, and toothed claws. The 
oblong-oval and entire eyes, toothed claws, and more attenuate elytra distinguish it 
from Sisenes. 
1. Vodomarus quadrifoveolatus. (Tab. VII. figg. 1, 1 a, labium; 1 4, 
maxilla and maxillary palpus.) 
Elongate, finely and rather thickly pubescent, shining ; the head flavous or flavo-testaceous, the base broadly 
* Sisenes scutellaris. 
Smaller, narrower, and more parallel than S. personatus; black or blackish-violaceous, the head in the middle 
behind and in front, the prothorax with the sides narrowly (in one example at the base only) and a broad 
stripe down the middle, the scutellum, the elytra with the suture for a short distance and in one example 
the sides from the base nearly to the middle (but narrowly so behind), orange-yellow ; antenne ( 9 ) black 
more slender than in S. personatus, joints 3-5 stouter than the others ; elytra with two fine sharp coste 
on the disc and one at the sides (without trace of a third costa between the outer one on the disc and 
the one at the sides); legs rather slender; the rest as in S. personatus. 
Length 64 millim. (@.) 
Hab. Amazons, Parad, Ega (H. W. Bates), Two examples. 
