of the Amazons Valley. 41 
This singular little species occurred only at Santarem, on the 
Lower Amazons. 
4, Hippopsis prona, n. sp. 
HT, linearis, elongata, fusca, nitida, collo vitta lata laterali, vertice 
lineis duabus, therace et elytris utrinque vittis tribus testaceo- 
griseis; capite infra valde retracto, supra quadrato ; elytris leviter 
oblique truncatis, acutissimis. Long. 5 lin. 
Head above quadrate, the lateral outline behind the eyes 
being nearly straight ; face elongated and very strongly retracted, 
tending towards the horizontal position, clothed with greyish 
hairs, and deeply impressed on the summit between the an- 
tenne; vertex coarsely punctured, having a shining, raised 
dorsal line, brown; sides each with a broad vitta, and vertex 
with two stripes, greyish. Antenne piceous, finely and densely 
fringed, basal joint gradually thickened from base to apex. 
Thorax cylindrical, covered with large even punctures; rusty 
brown, marked with six tawny-grey stripes. Elytra much elon- 
gated, four and a half times the length of the thorax, linear, 
gradually narrowed, and near the apex more quickly narrowed ; 
the latter prolonged into an acute point, the inner side of the 
prolongation formed by an oblique truncature, the sutural angle 
of which is distinct ; surface punctured in distinct rows, punc- 
tures indistinct towards the apex, brown, shining, marked on 
each elytron with three testaceous-grey stripes, the inner two of 
which unite at the apex; the middle stripe is famter and greyer 
than the other two, and is interrupted towards the base. Body 
beneath faintly punctured, piccous, and, with the legs, clothed 
with thin, grey pile. 
S. Paulo, Upper Amazons. 
5. Hippopsis fractilinea, n. sp. 
H. elongato-fusiformis, fusco-nigra, collo vitta laterali, vertice lineis 
duabus, thorace et elytris utrinque vittis duabus fulvis, vitta in- 
teriore elytrorum mox pone medium fracta; thorace supra trans- 
verse ruguloso ; elytris valde acuminatis. Long. 5-10 lin. 
Head narrower than the middle part of the thorax, and con- 
stricted midway between the eyes and the hind margin; face 
very short, moderately retracted, clothed with fulvous pile, cen- 
tral line deeply impressed; antenniferous tubercles with their 
mner margin dentate; vertex having a few large punctures in 
the middle, and a shining central line impressed posteriorly ; 
dark brown, sides each with a stripe, vertex with two narrow 
converging lines fulvous. Antenne greatly elongated, black. 
Thorax narrowed in front, and constricted near its hind margin, 
surface transversely punctate-rugose ; brownish black, shining, 
surface with two tawny lines, sides each with one similar line 
