24 
The disk of the thorax on each side is very convex, the mid- 
dle is depressed, with a raised dorsal line ; on each side is a 
large, rounded, velvety, dark-brown spot, which is impunctate, 
the rest of the surface being punctured. The elytra are grey- 
fulvous, the suture and some indistinct lines on the disk light 
grey, covered with small rounded brown spots, confluent in 
places ; the disk behind the middle is crossed by an elongate 
dark-brown spot, besides which there are two transverse macular 
lines of a yellowish colour. Body beneath black, scantily clothed 
with grey ; the second to fourth ventral segments have a spot of 
yellow hairs on each side. Legs pitchy, clothed with grey ; the 
tarsi yellowish, the middle and hind tibiae ringed with yellowish 
at the middle and the apex. The fore tibiae in the ^ are widely 
and abruptly dilated from near the base. 
Para and Villa Nova. It is found also at Cayenne, and exists 
in many collections under the name I have adopted. 
7. Acanthoderes albonigerj n. sp. 
A. oblongus, niger ; fronte, thoracis vitta mediana, elytrorum plaga 
magna elongata basali communi fasciaque magna maculari sub- 
apicali tomentosis ochraceo-albis ; ipso apice ochraceo. Long. 
7 lin. 2 • 
Head black, front ochreous punctured. Antennse shorter than 
the body, black, the basal half of the third and the bases of the 
remaining joints light grey. Thorax with the lateral tubercles 
prominent, acute ; the disk depressed, longitudinally punctured, a 
broad central stripe and a lateral one below the tubercle ochrey 
white. Elytra oblong, their sides rounded posteriorly, their 
apices sinuate-truncate, outer angles produced : the centro-basal 
ridge is strongly pronounced, and produced forward towards a 
corresponding sinuation in the hind margin of the thorax ; it is 
smooth and shining, not reaching the middle of the elytra be- 
hind, and leaving a broad depression at the base : the elytra are 
punctured, partly in lines, most thickly so on the sides near the 
base; black, a broad, basal, common stripe, including the scu- 
tellum, notched in the middle externally, and a broad, macular, 
uneven belt before the apex, not touching the suture, ochrey 
white ; the extreme tips are yellowish brown. The black parts 
are nearly naked, and have a few grey specks. Body beneath 
and legs black, thinly covered with grey hairs; tarsi grey. There 
is a row of ochreous points on each side of the abdomen. The 
fore tibise are widely dilated. The prosternum is produced be- 
hind, and the mesosternal tubercles are very prominent. 
Santarem. This species bears a superficial resemblance to 
certain Curculionidse of the genus Heilipus, inhabiting the same 
district. 
