SISENES. 139 
length of 3; prothorax subquadrate, the sides feebly rounded auteriorly and almost straight behind, the 
hind angles not prominent, the base grooved within, the disc with a shallow oblique depression on each 
side behind the middle, a shallower transverse depression in front of this, and a fine median ridge, the 
surface very closely and somewhat finely punctured; elytra comparatively short, parallel, densely and 
moderately finely punctured, and with two fine distinct costee on the disc and one at the sides, the inner 
one abbreviated before the apex, the suture also raised; beneath closely punctured and pubescent, piceous- 
brown, the venter a little lighter, the flanks of the prothorax bright violaceous; legs moderately slender, 
brownish, the penultimate joint of the tarsi tomentose beneath. 
Length 53 millim. (9.) 
Hab. Panama, Bugaba 1000 feet (Champion). 
* Two examples, both females. Broader than S. viridipennis; the antenne very much 
stouter; the thorax subquadrate and with the hind angles not prominent, less finely 
punctured, more opaque, rosy-red, with the basal margin in the middle and the flanks 
violaceous ; the elytra piceous-brown with a faint brassy (not greenish) lustre, and 
the first costa extending far beyond the middle; the legs a little stouter. 
2. Antenne with joints 3-5 a little thickened in the female, subfiliform or slightly 
tapering in the male; eyes feebly emarginate; elytra with fine coste. Species 
Lyciform. | 
15. Sisenes lineatocollis. (Tab. VI. fig. 19, 2.) 
Moderately elongate, finely pubescent, subopaque ; the head bronze or dark bronze, the sides of the front testa- 
ceous, the labrum piceous or black ; the prothorax orange-yellow, with a longitudinal dark bronzy, viola- 
ceous, or brownish stripe down the middle; the elytra piceous or black with a brassy, violaceous, or 
greenish lustre, sometimes of a testaceous colour at the extreme base, in one example testaceous with the 
sides and apical half indeterminately piceous-brown. Head about as broad as the prothorax, very closely 
and rather coarsely punctured, the eyes small; antenne black, stout, moderately long—subfiliform in the 
male, tapering a little outwardly and with joints 3-5 the stoutest in the female,—joint 2 very short; 
prothorax subquadrate, widest at the middle, the sides very slightly rounded anteriorly and almost straight 
behind, the hind angles not prominent, the base deeply grooved within and with prominent margin, the 
disc with a deep transverse depression on each side in front, a still deeper oblique depression on each 
side behind the middle, and a very prominent median ridge, the surface very closely and finely punctured ; 
elytra moderately long, parallel, densely and moderately finely punctured, and with two distinct coste on 
the disc and one at the sides, the inner one extending to about the middle and the others nearly reaching 
the apex, the suture also raised; beneath closely and finely punctured and pubescent, seneo-piceous, the 
flanks of the prothorax more or less stained with bright bronze or violaceous ; legs slender, variable in 
colour—piceous or piceo-testaceous with the basal half of the femora usually testaceous, the penultimate 
joint of the tarsi tomentose beneath. 
3. Fifth ventral segment broadly and feebly emarginate ; the sixth with the lateral lobes short. 
Length 44-7 millim. (¢ 2.) 
Hab. Mexico, Tapachula in Chiapas (Hége); GuatemaLa, Rio Naranjo, El Reposo, 
Zapote (Champion). 
Two examples from Mexico and seven from Guatemala, all but one from the lower 
part of the Pacific slope. As in several of the allied forms, the elytra vary a good 
deal in colour. The intermediate joints of the antenne of the female are thicker than 
in the male. The dark stripe down the disc, the prominent median ridge, on either 
TT 2 
