402 Mr. H. W. Bates on the Longicorn Coleoptera 
Amazon region, and appears to be a rare insect. I met with 
only one example, which was found closely adhering to a dead 
branch, and scarcely distinguishable from it on account of the 
colours resembling those of the lichens with which the wood was 
covered. 
2. Polyrhaphis hystricina. 
P. brevis, subconvexa, spinosa, tomentosa, cervino-fusca, postice 
cinereo variegata : thoracis spinis antrorsum valde curvatis: elytris 
truncatis, angulis internis acutis, externis valde productis. Long. 
12 lin. Co. 
Head scantily punctured, dull black, clothed with tawny- 
brown pile. Antenne dark brown. Thorax punctured near the 
fore and hind margins, clothed with tawny-brown pile clouded 
with dusky ; dorsal tubercles very large, obtuse ; lateral spines 
strong, elongated, and more strongly curved forwards than in 
P. spinosa. Hlytra rather short, subquadrate, slightly but gra- 
dually narrowed from the base, the sides nearly straight to three- 
fourths the length, and then gradually rounded to the apex, 
which is broadly truncated ; the sutural angle very slightly pro- 
duced, and the external one armed with a stout spine: the sur- 
face is studded with stout but not long or acute spines; there 
are five or six in a row on the strongly-raised centro-basal ridge, 
three or four along the suture near the middle, several smaller 
ones on the shoulders, and a short series of three or four between 
the shoulders and the centro-basal ridge, and, lastly, five on the 
disk, namely, two in the middle and three on the posterior part; 
the interspaces are studded with large, deep, and shining pune- 
tures, the apical portion of the elytra behind the spines alone 
being entirely smooth. Under surface of the body and legs 
black, thinly clothed with brownish pile; tarsi and a ring at the 
tips of the femora bright fulvous. 
There is a specimen of this species in the British Museum, 
ticketed “ P. hystricina, White,” which name I have adopted ; it 
is larger and paler in colour than my example, but agrees with 
it in all other respects. It appears to be a rare species. My 
specimen was taken near Para. 
3. Polyrhaphis angustata, Buquet. 
oo angustatus, Buquet, Aun. de la Soc. Ent. de France, 1853, 
p- . 
This species has been described at length by M. Buquet in 
the place quoted. It is an elongated parallel-sided species, 
14 lines long ; the elytra are free from spines or tubercles, being 
simply granulate and punctate partly in rows, but smooth to- 
wards the apex. The spines of the thorax are long and straight. 
The general colour is dull-reddish brown, varied with small 
