138 HETEROMERA. 
thorax, and broader head distinguish S. ¢estaceipes from S. telephoroides. A Chiriqui 
example is figured. 
12. Sisenes puncticollis. 
Elongate, finely pubescent, slightly shining; the head bronze, the anterior part reddish-yellow, the labrum 
and tips of the mandibles piceous; the prothorax reddish-yellow; the elytra piceous with an «neous 
lustre. Head broader than the prothorax, closely and coarsely punctured, the eyes small; antenne 
- brownish-ferruginous, moderately long, rather stout, joint 2 not half the length of 3; prothorax narrow, 
as long as broad, the sides rounded in front and moderately constricted behind, the base grooved within, 
the hind angles prominent, the disc very shallowly transversely depressed on each side in front (the usual 
oblique depression on each side behind the middle obsolete), the entire surface closely and coarsely 
punctured ; elytra long and parallel, densely, coarsely, and confluently punctured, and with one costa on 
the disc (the usual one between this and the suture obsolete) and one at the sides, the suture also raised ; 
beneath (the head and prothorax excepted) seneo-piceous, very closely and finely punctured and pubescent ; 
legs slender, piceous-brown, the femora darker, the penultimate joint of the tarsi tomentose beneath. 
Length 5; millim, 
Hab. Mexico, Oaxaca (Hége). 
One example, apparently a female. The more shining, almost unimpressed, more 
coarsely and more deeply punctured, rather narrower thorax, and the more coarsely 
sculptured and less opaque elytra distinguish this species from S. telephoroides. 
13. Sisenes foveatus. (Tab. VI. fig. 18, 2.) 
Elongate, finely pubescent, subopaque, the prothorax shining; the head greenish-eneous or red with the 
extreme base piceous, the anterior portion yellowish or red, the labrum, tips of the mandibles, and palpi 
piceous ; the prothorax red with a coppery lustre; the elytra blackish-violaceous. Head closely and 
comparatively coarsely punctured, the eyes small; antenne black, moderately long, rather stout, joint 
2 about half the length of 3; prothorax nearly as long as broad, the sides moderately rounded in 
front and feebly constricted behind, the base deeply grooved within and with prominent margin, the disc 
with a broad deep transverse depression on each side in front, a very deep, laterally extended, and 
more sinuous one on each side just behind the middle, and an interrupted median ridge, the surface 
coarsely and rather sparsely punctured, the transverse sinuous elevations separating the deep depressions 
smoother; elytra moderately long, parallel, densely and rather coarsely punctured, and with two fine 
sharply defined costz on the disc and one at the sides, the inner one abbreviated before the apex, the 
suture also raised; beneath (the prothorax excepted) sneo-piceous, finely and closely punctured and 
pubescent ; legs black, slender, the penultimate joint of the tarsi tomentose beneath. 
Length 63-63 millim. (9.) 
Hab. Mexico (Sallé), Oaxaca (Hoge). 
Two female examples. The shining, very deeply excavate, and coarsely and sparsely 
punctured thorax distinguishes this small species at once from the other similarly-coloured 
members of the genus, 
14. Sisenes thoracicus. 
Moderately elongate, finely pubescent, opaque ; the head bronze, the sides of the front testaceous, the labrum 
and palpi piceous ; the prothorax rosy-red, the basal margin violaceous in the middle; the scutellum and 
elytra piceous-brown with a brassy lustre. Head a little broader than the prothorax, densely and rather 
coarsely punctured, the eyes small; antenne black, very stout, moderately long, joint 2 not half the 
