APTEROMECHUS. 623 
one from another, the eyes distant ; rostrum short, feebly curved, depressed at the base, rugosely punctate, 
the antenne inserted at the middle, the club stout, ovate. Prothorax broader than long, rounded at the 
sides ; coarsely, densely punctate. Elytra oblong, much wider than the prothorax, subparallel in their 
basal half; with rows of coarse, subquadrate punctures, the interstices narrow, asperate, 2-9 raised. 
Beneath coarsely, densely punctate, the metasternum very rugose, the seriate punctures on the episterna 
large and deep. Legs short and stout; anterior femora broad and unarmed, the other femora feebly 
unidentate ; tibiz rounded externally. 
Length 53, breadth 24 millim. (<.) 
Hab. Nicaragua, Chontales (Belt). 
One worn specimen. This species agrees with A. nitidifrons in the sculpture of the 
head and rostrum, but differs from it in having each of the elytral interstices 2-9 
narrowly raised, and the under surface more densely punctate. The metasternum 
is very rugose. 
5. Apteromechus pigmentatus, sp.n. (Tab. XXX. figg. 26, 26a.) 
Oblong-ovate, dull, black, the antennew obscure ferruginous; thickly clothed with small brown scales, with a 
few whitish scales intermixed, the elytra with a very large, dense, whitish or brownish-white patch at 
the apex, the prothorax with longer, coarser, and transversely arranged scales, the alternate elytral 
interstices also set with short decumbent sete; the rostrum densely clothed with ochreous or whitish 
scales at the base; the vestiture of the under surface sparse and pale. Head rugulosely punctate, the 
eyes large, transverse, and not very widely separated; rostrum short, stout, feebly curved, slightly 
depressed at the base, rugulosely punctate, the apical half bare and shining, closely punctate in the g, and 
sparsely so in the 2 , the antenne stout, inserted at about the middle, joint 2 of the funiculus much shorter 
than 1, 3-7 transverse and closely articulated, the club oblong-ovate, with very distinct sutures. Prothorax 
transverse, rounded at the sides anteriorly, narrowed and feebly constricted in front, deeply bisinuate at 
the base; coarsely, confluently punctate, and also finely carinate. Elytra moderately long, considerably 
wider than the prothorax, subparallel in their basal half; seriate-punctate, the interstices rugose and 
obsoletely granulate, the interstices 3, 5, 7, and 9 much raised. Beneath densely punctate. Legs short 
and rather stout; femora obsoletely unidentate. 
Length 5-54, breadth 23-23 millim. (¢ 2.) 
Hab. Panama, Bugaba (Champion). 
Four specimens. In this insect the dense whitish patch on the elytra extends over 
the whole of the apical declivity, as in Oxypteropsis bipartitus and Euscepes truncati- 
pennis, from both of which the present species differs in having well-developed 
metathoracic episterna, &c. The femora might almost be described as unarmed. 
6. Apteromechus stigmosus, sp. n. (Tab. XXX. fig. 27.) 
Oblong-ovate, black, the antenne and the tips of the tarsi ferruginous; the elytra densely clothed with small 
fulvo-cinereous or cinereous scales, with a common, heart-shaped patch at about the middle, a short 
streak along the suture towards the apex, and some spots towards the base, black, the alternate interstices 
each with a row of short, semierect sete; the rest of the vestiture sparse, fine, fulvo-cinereous, the 
scales on the prothorax long and transversely arranged. Head rugulosely punctate, the eyes rather 
narrowly separated ; rostrum short, feebly curved, finely punctate, rugulose and subcarinate at the base, 
a little longer and almost smooth in the 9, the antennz inserted at the middle, joint 2 of the funiculus 
shorter than 1, the club oblong-ovate. Prothorax transverse, rounded at the sides, narrowed and feebly 
constricted in front; coarsely, confluently punctate, finely carinate anteriorly. Elytra much wider than 
the prothorax, gradually narrowing from a little below the base ; shining, seriate-punctate, the interstices 
