of the Amazon Valley. ©... . 123 
bristle: the centro-basal ridges are scarcely indicated: the sur- 
face is dull ferruginous, tomentose, with a few streaks of hoary 
colour; in the middle of the suture is a short, abruptly limited, 
dark-brown line. Body beneath black, thinly clothed with 
hoary pile. Legs ferruginous, clothed with similar pile and 
also with long pale hairs. 
The elytra in the male taper towards the apex, which is 
obliquely truncated, the outer angle being slightly produced ; 
in the female, the elytra are of equal breadth, and are obtusely 
rounded towards the tips, which are simply truncated obliquely. 
This species, which is nearly allied to A. pubicornis, Serv., 
of Rio Janeiro, I found at Obydos, in Brazilian Guiana, on de- 
cayed branches. I have a specimen, ?, also from Venezuela. 
2. Alphus senilis, n. sp. 
A, oblongus, tomento cano-olivascente vestitus: thorace punctato, 
tuberibus lateralibus productis, dorsalibus tribus acutis: elytris 
granulato-punctatis, fasciculis pilorum ornatis, apice eg oa 
rotundatis, regione scutellari fusca. Long. 8 lin. 
Head punctate, tomentose, slightly depressed between the an- 
tenn. Antenne half as long again as the body, ashy ; the tips 
of the joints blackish. Thorax with very acute prolonged lateral 
tubercles, and three acute and prominent dorsal ones arranged in 
a triangle; the surface closely punctured. Elytra oblong, mode- 
rately convex, rounded at the tips; the centro-basal ridges pro- 
minent, crested with tubercles, the scutellar space between them 
very thickly impressed with large, regular, oblong punctures ; 
this space is of a dusky or brown colour ; the rest of the surface 
is olive-ashy, coarsely granulate-punctate; each elytron has 
three indistinct incomplete longitudinal ribs, and along each of 
these is an interrupted row of small fascicles of hair. Body 
beneath and legs clothed with hoary tomentum. 
On dead branches, Obydos and Para. 
3. Alphus scutellaris, n. sp. 
A. oblongus, tomentosus, cinereus, thorace brunneo, spatio triangu- 
Jari apud scutellum violaceo-brunneo : thorace punctato, tuberibus 
lateralibus productis acutis, dorsalibus tribus obtusis : elytris gra- 
nulato-punctatis, fasciculis parvis pilorum ornatis, apice singulatim 
rotundatis. Long. 43 lin. 
Head punctured, tomentose. Antenne half as long again as 
the body, ashy; tips of the joints blackish. Thorax with very 
acute-pointed lateral tubercles, two obtuse dorsal ones, and a third 
behind, smaller, also obtuses the surface coarsely punctured, 
pubescent and brown in colour. Elytra with moderately raised 
crested centro-basal midges, the scutellar space between them 
