APTEROMECHUS. 625 
Prothorax a little broader than long, the sides subparallel at the base; densely, confluently punctate. 
Elytra much wider than the prothorax, subparallel in their basal half; shining, seriate-punctate, the 
interstices rugulose and granulate, 3, 5,7, 8, and 9 a little raised. Beneath sparsely, rather finely 
punctate. Mesosternum feebly emarginate. Legs short and stout; anterior femora unarmed, the other 
femora obsoletely dentate. 
Length 44, breadth 23 millim. (¢.) 
Hab. Panama, David (Champion). 
One specimen. The coarser pallid scales in this species are condensed into a broad 
subapical fascia, which extends up the outer part of the disc to the base. The rostrum 
is very short, stout, and rugose. 
10. Apteromechus longulus, sp. n. 
Oblong-ovate, narrow, black, the antenne ferruginous; the elytra mottled with pale brown scales (the 
vestiture becoming denser beyond the middle), with an oblong darker brown patch on the suture before 
the tip, and also set with very short, fine, decumbent sets ; the rest of the surface with small scattered 
scales, those on the prothorax longer and transversely arranged. Head densely punctate, the eyes 
narrowly separated ; rostrum short, feebly curved, shining, sparsely punctate, smooth down the centre, 
the antenne inserted at about the middle, joint 2 of the funiculus much shorter than 1, 3-7 transverse, 
the club ovate. Prothorax a little broader than long, rounded at the sides, narrowed in front; coarsely, 
confluently punctate, and feebly carinate. lytra oblong, wider than the prothorax, subparallel in their 
basal half; shining, seriate-punctate, the interstices rugulose, granulate, convex, 3, 5, and 7 a little more 
prominent. Beneath shining, coarsely, closely punctate. Legs short and stout; femora obsoletely 
unidentate. 
Length 43, breadth 14 millim. (9?) 
Hab. GuatTeMaa, Chacoj in the Polochic Valley (Champion). 
Two specimens. This is one of several very closely allied forms, and chiefly 
recognizable by its rather narrow, oblong elytra, which have a dark patch at the apex, 
the narrowly separated eyes, and the longitudinally confluent punctuation on the 
prothorax. The rostrum is smoother, more slender, and less curved than in 
A. rugirostris. 
11. Apteromechus punctiventris, sp. n. 
Oblong-ovate, nigro-piceous, the antenne, the rostrum, and the tarsi in part, ferruginous ; the elytra thickly 
clothed with rather coarse pale brown scales, each interstice with a row of fine, decumbent, pallid setze ; 
the rest of the vestiture very sparse and fine. Head opaque, rugulosely punctate, the punctuation 
becoming much coarser between the eyes, which are somewhat distant; rostrum short, feebly curved, 
dull and coarsely punctate at the base, shining and minutely punctate (except down the centre) thence 
to the tip, the antenne inserted slightly behind the middle, the club oblong-ovate. Prothorax broader 
than long, coarsely, rugosely punctate, the punctures longitudinally confluent. Elytra much wider than 
the prothorax, subparallel in their basal half; seriate-punctate, the interstices rugulose, subgranulate, 
convex, 3 and 5a little more raised. Beneath dull, very coarsely, rather sparsely punctate; ventral 
segments 1 and 2 subconnate. Legs short and stout ; femora feebly unidentate. 
Length 42, breadth 2 millim. (9?) 
3) 
Hab. Mexico, Oaxaca (f/6ge). 
One specimen. Very like A. nitidifrons, but differing from it in the sculpture of 
the head, rostrum, prothorax, and under surface, the toothed anterior femora, &c. 
The eyes are more distant than in A. longulus. 
BIOL. CENTR.-AMER., Coleopt., Vol. LV. Pt. 4, January 1906. 4LL 
