SISENES. 135 
raised ; beneath closely punctured and thickly clothed with long ashy pubescence, fusco-testaceous, the 
metasternum and the venter stained with eneous; legs slender, piceous, the base of the femora and of 
the tibie lighter, the penultimate joint of the tarsi tomentose beneath. 
3. Fifth ventral segment very deeply emarginate; the sixth with the lateral lobes long and spoon-shaped 
and protruding beyond the fifth. 
Length 73-83 millim. (¢ 2.) 
Hab. Nicaraeva, Chontales (Belt); Panama, Volcan de Chiriqui 3000 feet (Champion). 
A male from Nicaragua and a female from Chiriqui. From the striped form of 
S. sugfusus this species may be distinguished by the closer and finer punctuation of the 
head and thorax; the elytral vitta is narrower, placed nearer the lateral margin, and 
extends upwards to the shoulder; the legs are darker, the eyes larger and more oblong, 
the antenne longer, the under surface duller and more pubescent, and the fifth ventral 
segment in the male more deeply emarginate. 
The Chiriqui specimen is figured. 
7. Sisenes rubricollis. (Tab. VI. fig. 15, 3.) 
Elongate, finely and thickly pubescent, opaque, the elytra and the greater part of the head black or piceous- 
brown, the latter with the anterior part (the labrum and the tips of the mandibles excepted) flavous and 
the posterior part sometimes of a more eeneous tint, the prothorax dull red or rosy-red. Head very 
densely and moderately finely punctured, the eyes rather small but prominent, the palpi fusco-testaceous ; 
antennee long and filiform, about reaching the middle of the elytra in the female, longer in the male, 
joint 2 rather more than one-third of the length of 3, black, the two basal joints sometimes testaceous 
beneath ; prothorax about as long as broad, the sides moderately rounded in front and a little constricted 
behind, the base grooved within and with rather prominent margin, the disc shallowly transversely 
depressed in front, with a rather deep oblique depression on each side behind the middle, and a more or 
less distinct median ridge, the surface very densely and moderately finely punctured ; elytra long, more 
parallel in the male than in the female, densely and somewhat roughly punctured, and with two fine 
costee on the disc and one at the sides, the two outer ones nearly reaching the apex and the inner one 
extending to a little beyond the middle, the suture also raised ; beneath slightly shining, thickly pubes- 
cent, variable in colour—usually flavo-testaceous with the metasternum and the sides of the venter piceous 
or eneo-piceous, sometimes in great part piceous, the lower part of the flanks of the prothorax violaceous 
and smooth, the rest of the surface closely and finely punctured ; legs slender, varying in colour from 
piceous to fusco-testaceous, the penultimate joint of the tarsi tomentose beneath, the hind tibis in some 
examples slightly curved or sinuous. 
3. Fifth ventral segment deeply triangularly emarginate; the sixth with the lateral lobes long and spoon- 
shaped and protruding beyond the fifth. 
Length 63-83 millim. (¢ 2.) 
Hab. Mexico, Cordova’ (Sallé), Jalapa, Oaxaca (Hoge), Atoyac in Vera Cruz (Schu- 
mann). . . 
This species is apparently common on the Atlantic slope of Southern Mexico, whence 
we have received many specimens. S. rubricollis is allied to S. suffusus, from which its 
more densely and less coarsely punctured head and thorax, duller and more closely and 
more distinctly punctured under surface, more deeply emarginate fifth ventral segment 
in the male, and more opaque and differently coloured upper surface distinguish it 
at once. The specimens in the Sallé collection are labelled with the inapplicable MS. 
name of Asclera rufiventris, Chevr. 
