1867.] 25 
»■ 
dilated, coarsely setose, unarmed. Thorax spindd on each side. Ely tra cylindrical , 
apex truncate, unarmed ; surface with ivory-like spots, as in Eburia. Legs 
elongated, especially the hind pair, linear ; apex of thighs acute on each side ; tarsi 
not half the length of the tibias. Mesostemum with a large smooth tubercle in the 
middle. 
M. Dorilis, n. sp. 5 lines. Reddish-tawny, clothed throughout with erect, 
tawny bristles. Head i-ugose, forehead sulcate. Thorax strongly wrinkled 
transversely. Elytra thickly punctured ; an ovate ivory spot in the middle of the 
base, and two similar spots in conjunction on the disk, a little behind the middle, 
the latter bordered with brown. 
Ega ; on foliage in tlie forest. Notwithstanding the elongated 
muzzle, I believe this genus belongs to the Eburia group, standing near 
Heterops (Blanch.). 
Atharsus, n. g. 
Body rather short, sub-linear, depressed, naked. Muzzle very short, palpi 
sub-securiform, eyes prominent, coarsely facetted. Antennas clothed with long 
fine hairs, elongated, third and fifth joints armed at their tips with a short spine ; 
antenniferous tubercles obsolete. Thorax prominent in the middle, but unarmed. 
Elytra rounded at the apex, briefly truncated near the suture, unarmed. Meso- 
stemum broad, plane. Legs short, setose ; thighs clavate ; knees unarmed ; tarsi 
short, basal joints elongate -triangular. 
A. nigricauda, n. sp. 5 lines. S ■ Reddish-testaceous, neck and pro-thorax 
red, head (except the neck), antennee, apex of the elytra, and feet, black ; head 
thickly punctured, thorax very finely rugose and sub-opaque ; elytra shining, and 
finely punctured. 
Banks of the Tapajos. The genus belongs to the Sphcerion group. 
Terpnissa, n. g. 
Body elongate, sublinear, scantily clothed with fine, long hairs. Muzzle very 
short, eyes prominent and coarsely facetted; palpi sub-securiform. Antennae 
long and slender, 3rd — 5th joints spined at their apices. Thorax sub-ovate, convex, 
unarmed. Elytra rounded before the apex, the latter at a distance from the suture 
armed with a spine. Legs elongated, thighs clavate, tibiae long, linear ; tarsi short 
and narrow. Prostemum extremely narrow ; mesosternum plane. 
T. Listropterina n. sp. 5^ lines. S ■ Opaque greyish black ; four basal joints of 
antennae deep black, rest yellow. Head behind and thorax red, clothed with laid 
silken pile ; thorax crossed by two sub-interrupted ridges, sides prominent. 
Scutellum blackish, semi-oval. Elytra finely punctured, clothed with fine hoary 
pile, except the basal third, the lateral margin, and a fine streak down the disk of 
each to three-fourths the length, which are dull blackish. Legs clothed with 
fine long setse ; blackish. Breast and abdomen blackish, clothed with fine hoaiy 
pile, as in Listroptera. 
Banks of the Tapajos. Eesembles certain species of Listroptera ; 
but belongs to the SpJicsrion group. 
