110 RHYNCHOPHORA. 
several with the femora sulcate along the greater part of their length beneath, one 
(EZ. septemnotatus) with the anterior femora feebly dentate, and one (F. sqguamu- 
latus) with the posterior femora faintly carinate. In £. tenutrostris and its allies, 
which will probably have to be separated eventually, the antenne are inserted very 
near the base of the rostrum, the prothorax is more or less conical, and the rostrum 
and rostral canal are sometimes longer in the female thanin the male. In EF. scutulatus 
and E. coruscus the meso- and metasternal excavation is wanting. The mesothoracic 
epimera often ascend more or less, and some of the species (£. nitidus and £. coruscus) 
might easily be mistaken for Barids, from which they may be distinguished by the form 
of the eyes. 
The various Central-American forms, many of which are represented in our 
collection by a single example only, may be grouped thus :— 
a. Anterior femora obsoletely dentate, the others unarmed, the posterior pair not 
carinate externally, all sulcate along the greater part of their length beneath; 
rostral canal not extending beyond the mesosternum . . . . . . . . Species 1. 
b. All the femora unarmed, the posterior pair not or rarely carinate externally. 
a’, Antenne (except in E. levirostris) inserted at some distance from the base 
of the rostrum, the latter usually rather stout. 
a’, Rostral canal reaching about as far as the posterior margin of the middle 
COX2.: 
a’. Femora sulcate along the greater part of their length beneath; joints 1 
and 2 of the funiculus subequal inlength . . . . . . . . . Species 2. 
6°. Femora sulcate at the apex only beneath. 
a‘, Eyes smaller; joints 1 and 2 of the funiculus subequal in length. 
a’. Vertex with a conspicuous smooth flattened space down the middle ; 
elytral strie broad: body subrhomboidal, the vestiture coarse, 
the scales on the elytra oval . . . Lo. . Species 8. 
6°, Vertex simply punctate; elytral strie narrow: body oblong, the 
vestiture rather coarse and overlapping . . - « . Species 4, 
b*. Eyes very large ; joint 2 of the funiculus longer than L: , prothorax 
hollowed at the apex, with feebly-developed ocular lobes - + « . Species 5. 
6°. Rostral canal extending well into the vertical anterior face of the meso- 
sternum, not reaching as far as the posterior margin of the middle coxe ; 
joint 2 of the funiculus not longer than 1. 
c’. Femora sulcate along the greater part of their length beneath. . . Species 6-16. 
ad’. Femora sulcate at the apex only beneath. 
c’. Body oblong 
d’. Body ovate . Loe . see ee 
» Rostr al canal (as seen from above) not extending beyond the mesosternum. 
. Prothorax subcylindrical ; prosternum with a conical tubercle behind 
each anterior coxa ; femora sulcate at the apex only beneath 
f°. Prothorax more narrowed anteriorly ; prosternum without conspicuous 
tubercle behind the anterior cox. 
Species 17, 18. 
Species 19, 
Species 20. 
