268 RHYNCHOPHORA. 
convex part of the head is sharply separated from the lateral portion. The seven species 
from Mexico or Guatemala now added may be distinguished thus :— 
a. Scutellum visible. 
a’, Upper surface pubescent ; elytra about twice as long as the prothorax, 
with seriate punctures; all the femora minutely dentate; head 
without a supra-ocular sulcus. 
a’, Prothorax coarsely, closely punctate; elytra comparatively long, 
moderately convex, somewhat flattened on the disc, punctate- 
striate... . . . Loe . . piliferus, sp. n. 
6’. Prothorax very sparsely punctate ; elytra shorter, convex, ‘finely 
serlate-punctate . 2... 1. 1 ee we we ew eee CaStaneipennis, sp. 1. 
b’. Upper surface glabrous; elytra very little longer than the prothorax, 
smooth ; anterior and intermediate femora minutely dentate; head 
with a deep supra-ocular sulcus . . . . . . . . .  . . Oactrianus, sp. n. 
6. Scutellum not visible. 
c’. Upper surface pubescent ; elytra gibbous, punctate-striate, the striz 
coarsely punctured towards the sides; all the femora minutely 
dentate. 
ce’, Elytra rather more than twice the length of the prothorax, inflated 
for the greater part of their length . . . . . gibbipennis, sp. n. 
d’’, Elytra barely twice the length of the prothorax, inflated anteriorly 
and rapidly narrowing and declivous thence to the apex . . . @neopiceus, sp. n. 
d'. Upper surface glabrous; elytra smooth; anterior femora only, at 
most, minutely dentate. 
e’’, Elytra moderately convex; head not deeply excavate above the 
eyes; legs stout, annulate . . . . . wu. . » . « levigatus, sp.n. 
f". Hlytra gibbous ; head deeply: excavate above the eyes ; legs slender, 
notannulate. . . 2. 2. ee ee ew we ew we ee ew ghabratus, sp. n. 
1. Oopterinus piliferus, sp.n. (Tab. XIV. figg. 1, 1a.) 
Moderately elongate, shining, piceous, the antenn, the cox, the base of the femora, the tibiw, and tarsi more 
or less ferruginous ; sparsely clothed with adpressed, rather long, yellowish-white hairs, the pubescence of 
the under surface and legs a little shorter. Head convex, coarsely, closely punctate, the eyes moderately 
large and widely separated ; rostrum stout, a little shorter than the prothorax, rugosely punctured and 
longitudinally wrinkled. Prothorax convex, slightly longer than broad, rounded at the sides anteriorly, 
sinuously narrowed behind, coarsely, closely punctate, the punctuation becoming more scattered on the 
flanks. Scutellum minute, vertical. Elytra moderately convex, slightly flattened on the disc, two and 
one-fourth times the length of, and in their widest part about once and two-thirds broader than, the 
prothorax ; punctate-striate, the punctuation becoming coarser towards the sides, the interstices feebly 
convex, and each with an irregular row of very minute scattered punctures. Legs stout, rugulosely 
punctulate ; femora each with a minute tooth. 
Length 43, breadth 2 millim. 
Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith). 
One specimen. Larger and more elongate than 0. gibbipennis and O. castaneipennis, 
