NOTOXUS. 205 
1. Notoxus ruficollis, (Tab. KY) fig. 13, 13 a.) 
Elongate, rather narrow; the head pitchy-black, finely and sparsely pubescent, and with some long erect 
hairs in front; the prothorax reddish-testaceous, the horn and crest piceous, sparsely clothed with fine, 
silky, decumbent, ashy pubescence and with scattered erect hairs, the basilar groove on either side filled 
with dense whitish pubescence ; elytra leaden-black, dull, clothed with exceedingly short, fine, decum- 
bent, ashy pubescence and with scattered, rather longer, serially arranged, decumbent hairs. Head 
minutely punctured, the front concave, the eyes moderate in size; antenne pitchy black, the apical joint 
lighter; prothorax broader than long, minutely and rather sparsely punctured—the horn moderately long, 
rather narrow, slightly wider in the female, oval at the tip, the sides coarsely serrate and margined, the 
crest not much raised, its margins indicated by a row of rather coarse tubercles ; elytra moderately long, 
widest about the middle, very finely, shallowly, and closely punctured, the usual oblique depression below 
the shoulders obsolete, the humeri moderately distinct, the apices conjointly rounded in both sexes, the 
sutural angle obtuse; beneath piceous ; legs pitchy-brown. 
Length 3 millim. 
Hab. Panama, San Lorenzo in Chiriqui (Champion). 
Two examples, apparently male and female. Closely allied to J. bicolor (Say), a 
common insect in the Atlantic States of North America, from a type of which (kindly 
communicated by Dr. Horn) it differs in its narrower shape, narrower thoracic horn, 
much more finely punctured elytra, darker head, antenne, legs, and thoracic horn, and 
smaller size. The elytra are very opaque, and clothed with exceedingly short, fine, 
decumbent pubescence and serially arranged rather longer hairs. The head and thorax 
bear scattered long erect hairs, the thoracic horn is clothed with long hairs beneath, 
and the basilar groove is filled on either side with dense whitish pubescence. 
2. Notoxus atripennis. 
Elongate, rather narrow, opaque; the head piceous-brown, testaceous in front, finely and sparsely pubescent ; 
the prothorax reddish-testaceous, the horn and crest piceous, sparsely clothed with long, silky, decum- 
bent fulvous pubescence, the horn above and beneath with rather long hairs, the basilar groove on 
either side filled with dense whitish pubescence; elytra dull black, clothed with exceedingly short, 
fine, decumbent, ashy pubescence. Head finely punctured, the~front slightly concave, the eyes large ; 
antenne pitchy-black, the apical joint lighter ; prothorax as long as broad, finely punctured—the horn 
moderately long, rather broad, rounded at the tip, the sides serrate and margined, the crest not much 
raised, its margins indicated by a row of coarse tubercles; elytra long, widest about the middle, very 
finely, shallowly, and closely punctured, the usual oblique depression below the shoulders obsolete, the 
humeri moderately distinct, the apices conjointly rounded, the sutural angle obtuse ; beneath piceo-testa- 
— ceous ; legs pitchy-brown. ; 
Length 33 millim. (@.) 
Hab. GuateMaa, Chacoj in the Polochic valley (Champion). 
One female example. The eyes in this species are ‘unusually large, considerably 
larger than in V. ruficollis or N. bicolor. ‘The thorax is‘longer than in N. ruficollis ; 
the pubescence on the disc is longer and fulvous in colour ; ‘and the horn is broader and 
less coarsely serrate laterally. As in V. ruficollis, the elytra are much more finely and 
shallowly punctured than they are in WV. bicolor. 
