134 HETEROMERA. 
c. Tarsi with the penultimate joint only tomentose beneath ; eyes feebly emarginate ; 
elytra with fine coste. 
5. Sisenes parasiloides. (Tab. VI. fig. 13, ¢.) 
Elongate, narrow, finely and thickly pubescent, opaque, the head and prothorax slightly shining, testaceous or 
flavo-testaceous, the prothorax sometimes with a faint eneous or cupreous lustre, the apical half, two- 
thirds, or three-fourths of the elytra black or piceous (this colour usually extending more or less up the 
suture and cut off obliquely from the pale basal portion). Head thickly and somewhat coarsely punc- 
tured, broader than the prothorax in both sexes, the eyes small, the latter and the palpi slightly stained 
with piceous ; antenne long and very slender, filiform, piceous, the two basal joints (and sometimes the 
extreme base of the others) fusco-testaceous, joint 2 about half the length of 3; prothorax about as long 
as broad, the sides moderately rounded in front and converging behind, the base grooved within and with 
prominent margin, the disc shallowly transversely depressed in front, with a shallow oblique depression 
on each side behind the middle, and a more or less distinct smooth median line or ridge, the surface 
closely and rather coarsely punctured ; elytra moderately long, parallel, densely and rather coarsely punc- 
tured, and with two fine vague costz 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 a little raised ; 
beneath flavo-testaceous, the apical two or three segments of the venter usually eneo-piceous, pubescent, 
shining, very finely punctured ; legs slender, testaceous, the apices of the tibie and the tarsi sometimes 
stained with piceous, the penultimate joint of the tarsi tomentose beneath. 
é. Fifth ventral segment broadly and shallowly triangularly emarginate; the sixth with the lateral lobes 
short, hairy, and projecting beyond the fifth. 
Length 53-7 millim. (¢ 9.) 
Hab. GuaTEMALA, Purula and Sinanja in Vera Paz (Champion). 
This insect has much the general facies of the Malacoderm-genus Parasilis, two 
species of which inhabit Central America. SS. parasiloides is closely allied to S. suffusus, 
but is smaller and differently coloured ; the head and thorax are not so densely punc- 
tured and are less opaque, the oblique depression on each side of the disc of the latter 
being much shallower; the antenne are more slender ; and the sixth ventral segment 
of the male is very differently shaped. 
Numerous examples, all captured in the humid forest-region of the ‘Aviantic slope. 
6. Sisenes vittatipennis. (Tab. VI. fig. 14, 2.) 
Elongate, finely and thickly pubescent, opaque, the head and prothorax (when denuded of pubescence) rather 
shining ; the head sneous or greenish-zeneous, with the anterior portion or the sides of the front yellowish, 
the labrum and the tips of the mandibles piceous; the prothorax cyaneous, with the disc violaceous, the 
elevated transverse space before the middle seneous, and the sides flavous at the base, or testaceous with the 
disc greenish-seneous ; the elytra bluish-black with the disc dark brown, or brown with an seneous lustre, 
and with a narrow sordid yellow stripe extending from the shoulders nearly to the apex, and the suture 
also a little lighter in colour. Head very closely and finely punctured, the eyes oblong and rather large 
but not prominent ; antennz piceous or fusco-testaceous, very long, slender, and filiform, extending nearly 
to the end of the elytra in both sexes, joint 2 one-third of the length of 3, the succeeding joints very 
_ elongate ; prothorax a little longer than broad, the sides moderately rounded in front and converging behind, 
the base grooved within and the margin prominent, the disc shallowly transversely depressed in front, with 
a deep oblique depression on each side behind the middle, and a more or less distinct median ridge, the 
surface very closely and finely punctured; elytra long, parallel, densely and rather coarsely punctured, 
and with two fine coste on the disc and one at the sides, the two outer ones nearly reaching the apex and 
enclosing the yellowish vitta and the inner one extending to a little beyond the middle, the suture also 
