NOTOXUS. 207 
Found in abundance at Zapote, more sparingly elsewhere. This elegant little species 
is the smallest of the Central-American Wotoxi. It may be readily identified by the 
two oblique fasciz on each elytron (one occupying the oblique post-humeral depression, 
the other extending upwards and nearly or quite reaching the suture); the punctuation 
is dense, not only on the thorax but on the elytra also, the thorax being quite opaque ; 
the pubescence is fine and decumbent; the oblique depression on the elytra is deep in 
both sexes; the thoracic horn varies greatly in width in the two sexes (in one female 
example it is twice as wide as in some males). The North-American WV. bifasciatus, 
Lec., approaches N. eximius in some of its characters, and an undescribed Notoxus from 
Santarem on the Upper Amazons (specimens of which are contained in the British- 
Museum collection) also comes near it. 
5. Notoxus opacus. (Tab. IX. figg. 16, 16a, ¢.) 
Elongate, subparallel, opaque, piceous, thickly clothed with rather coarse decumbent pubescence and scattered, 
serially arranged, moderately long, erect hairs ; the prothoracic horn rufous ; the elytra with a large spot on 
either side of the suture immediately below the base, a rather broad fascia just beyond the middle (formed 
by a curved transverse band on each elytron, these extending upwards at the suture), and an apical patch, 
these markings black and clothed with dark brown pubescence, the rest of the surface ofa dull leaden colour 
and clothed, like the head and prothorax, with ashy pubescence. Head rather narrow, very finely and 
sparsely punctured, the front slightly concave; prothorax relatively small, about as long as broad, very 
finely and sparsely punctured, slightly shining—the horn ( ¢ ) long and narrow, rounded at the tip, very 
feebly margined and slightly serrate at the sides, the crest moderately raised, a little narrower than the horn, 
and finely margined ; elytra moderately long, comparatively broad, subparallel, very opaque, closely and very 
finely punctured, the usual oblique depression below the shoulders rather deep (the postscutellar spot appear- 
ing raised), the humeri distinct, the apices conjointly rounded ; beneath and the antennz piceous, the basal 
joints of the latter ferruginous; legs piceous, the tibie at the base and the tarsi, in part, ferruginous ; 
fifth ventral segment deeply transversely concave in the middle behind and the apex truncate in the 
male. 
Length 33 millim. (<¢.) 
Hab. Mexico, Cerro de Plumas (fége). 
One. male example. A very distinct species, recognizable by the opaque elytra, 
narrow head and thorax, and long and narrow thoracic horn; the transverse concavity 
of the fifth ventral segment of the male is very deep. ‘The markings of the elytra are 
clothed with dark brown pubescence, the rest of the surface with ashy pubescence, the 
transition from one to the other being very abrupt, though the ground-colour of the 
elytra itself is very dark. When denuded of pubescence, the thorax is moderately 
shining and the elytra are opaque. 
6. Notoxus ventralis. (Tab. IX. figg. 17, 17a, ¢.) 
Elongate, subparallel, piceous, thickly clothed with fine decumbent pubescence, without intermixed erect hairs ; 
the disc of the prothorax and the horn and crest reddish-testaceous ; the elytra with a large elongate- 
subtriangular lateral patch before the middle extending to the shoulders and along the base, and a narrow 
strongly angulated fascia (formed by a V-shaped mark on each elytron) considerably beyond the middle, tes- 
taceous, these marks clothed with whitish pubescence, the rest of the surface with brownish pubescence (the 
