243 
rali fulvo-flava, inter antennas profunde indentato ; thorace utrin- 
que vitta lateral! fulva ; elytris elongatis, juxta apicem angustalis, 
apice singulatim rotundatis et brevissime emarginatis, supra punc- 
tato-striatis, macula humerali cuneiformi vittaque lata mediana 
fulvis ; antennis nigris, ultra medium annulo lato flavo, articulo 
tertio longissimo, ciliato. Long. 5 lin. <S . 
Head coarsely punctured, forehead convex, mouth projecting, 
vertex deeply depressed between the bases of the antennse, tawny 
yellow, the crown and occiput and a stripe behind each eye 
black. Antennee as long as the body, black, with the apical 
half of the fourth, the whole of the fifth, and the base of the 
sixth joints yellow ; basal joint elongate, gradually thickened 
and fringed with very long, fine hairs ; third joint nearly as long 
as the whole of the succeeding joints taken together, not thick- 
ened, but furnished beneath with a continuous fringe of very 
long hairs ; fourth joint not much longer than the fifth, and 
destitute of fringe. Thorax coarsely punctured, leaving smooth 
spaces on the disk, behind deeply impressed ; fulvous, with a 
broad central and lateral vittse black. Elytra linear, except very 
near the apex, where they are narrowed, the apex itself being- 
narrow and apparently entire, but showing, on close examina- 
tion, a very shallow emargination and minute tooth ; disk regu- 
larly and rather deeply punctate-striate, black, a wedge-shaped 
basal spot and a broad median vitta fulvous. Body beneath 
black ; sterna and centre of the breast bright testaceous yellow. 
Legs black, base of thighs testaceous yellow. 
S. Paulo, Upper Amazons. 
2. Tyrinthia scissifrons,^ n. sp. 
T. elongata, linearis, setosa, fuliginoso-nigra ; fronte, vitta lateral! 
thoracis lineolaque lateral! elytrorum fulvo-testaceis ; femoribus 
basi articuloque quinto aiitennarum rufo-testaceis ; antennis arti- 
culis tertio et quarto biciliatis ; fronte (maris) tumida, conica, apice 
fissa. Long. 4 lin. S • 
Head testaceous yellow, vertex and occiput black ; upper part 
of the forehead ( ) conically produced and cleft at the apex, 
and antenniferous tubercles armed on the inner side with a 
conical prominence. Antennse as long as the body, black, with 
the fifth joint reddish ; basal joint on its upper side abruptly 
thickened, hairy ; third and fourth joints together longer than 
the whole of the remaining joints, slightly thickened and fur- 
nished beneath with two fringes of long and fine hairs. Thorax 
coarsely punctured, and with a smooth dorsal line, black, a 
narrow stripe on each side pale testaceous. Elytra linear, singly 
rounded and entire at the apex ; surface very closely punctured 
and furnished with three obtuse costje, dull black; lateral edge 
2 a2 
