290 RHYNCHOPHORA. 
10. Apical elytral process scarcely longer than broad... . . . . [schaufussi, sp. n.] 
Apical elytral process much longer than broad . . . . . . « « = torneutes, sp. n. 
11. Antennal club with no marginal fringe ; funiculus 8-jointed . . . 12. 
Club with a fringe of long hairs, at least in one sex ; funiculus 2-jointed. hydridus, sp. n. 
12. Elytra explanate at tip, subcontiguous at the apex of the suture ; 
declivity conically elevated in the middle . . . . . . . ~~. Is. 
Elytra produced, and divaricate at tip . . 14. 
13. Elytra evidently wider than the length from the base to o the top of ‘the 
declivity . . . . . .  brevipennis, sp. n. 
Elytra not wider than the length from the base to 5 the declivity . . [grouvellei, sp. n.] 
14. Processes of the elytra gouge-like, concave internally, narrowly sepa- 
rated . . 2 9 
Processes narrow, clubbed, not concave internally, remote, convergent. propugnatus, sp. 0. 
15. Prothorax rounded at apex . © 2... ee ee ee ew eee 1. 
Prothorax produced beyond the head into an acute peak . . . . . fastigatus, sp. n. 
16. Elytra unicolorous black or piceous . . . re 2 
Elytra testaceous-yellow, with the apex darker es £25 
17. Apical processes of the elytra transverse, narrowly separate . . . . collaris, sp. n. 
Processes much longer than broad, rather widely separate. . . . . tenuis, sp. n. 
18. Outer apical angle of the elytral process armed with a strong inwardly 
directed tooth . . . . woe ee ee we ee ws. filiformis, sp. n. 
The angle rounded and unarmed woe ee ew ee ww ee berebella, sp. n. 
1. Amphicranus elegans. (Tab. IX. figg. 5; 5a, antenna; 50, apex of 
elytra.) 
Amphicranus elegans, Eichh. Berl. ent. Zeitschr. 1868, p. 276°; Rat. Tom. p. 463 *. 
Hab. Mexico 1, Toxpam (Sallé), Cordova (Eichhoff?) ; Nicaracua, Chontales (Belt). 
This species, one of the largest of the Tomicini, is distinguishable by its colour, deep 
‘black with the abdomen bright ferruginous. Three specimens from Toxpam and one 
from Chontales represent it in our collections. The last-mentioned example is smaller, 
with the elytra shorter and less produced, than the others; it corresponds with 
the form which Eichhoff queries as a variety. This there is at present no reason to 
doubt *. 
* Reference may be made here to some other species which have not been found in Central America :— 
Amphicranus thoracicus. 
Amphicranus thoracicus, Er. Wiegm. Arch. 1836, i. p. 377. 
Piezorhopalus nitidulus, Guér. Rev. Zool. 1838, p. 107 ”. 
Amphicranus crenatus, Eichh. Rat. Tom. p. 465 *. 
Hab. Guiana, Cayenne’; Braziz?%, Rio Janeiro (Fry). 
An example in my collection, which agrees completely with Eichhoff’s type, has been kindly compared with 
that of Erichson by Dr. Kolbe, who informs me that he regards it as certainly A. thoracius, Er. Guérin’s species 
- was founded on a colour-variety, such as Eichhoff himself indicated in A. retusus as a sexual distinction. 
