380 SUPPLEMENT. 
In some examples there is a broad oblique stripe on the elytra anterior to the sub- 
median dusky streak, of a paler tawny brown than the ground-colour, which latter is a 
reddish brown, inclining to tawny orange. The antenne, tibie, and tarsi are ringed as 
usual in the group. 
18. Acanthoderes arietis. (Tab. XXIII. fig. 10.) 
A, cornuto affinis; differt ater ala thoracis tuberibus latero-dorsalibus parum elevatis apice bituberculatis. 
Oblongo-subovatus (elytris minus recte trigonis) rufescenti-fulvo-fuscus; elytris nigro-fusco guttatis, 
maculisque angularibus discoidalibus utrinque tribus, nigro-fuscis, litura communi cornua arietis simulanti 
versus basin, flava; fronte cinereo-flava, occipite purpureo-fusco fulvo bilineato ; elytris apice angustis, 
sinuato-truncatis, angulo exteriori dentiformi, carinis dorsalibus validis basi divaricatis et granulatis, basi 
sparsim granulatis deinde disperse grosse punctatis; femoribus castaneo-rufis vel fuscis, tibiis nigro- et 
griseo-annulatis ; mesosterno declivi bituberculato; antennis quam ¢ corpus paullulum longioribus, articulis 
°-4™ conjunctis quam cetera sequentia brevioribus, articulis 3°-11™ basi plerumque anguste griseis. 
Long. 6-93 lin. ¢$ Q. 
Hab. Guatemata, Cerro Zunil (Champion). 
This well-marked species, of which Mr. Champion took a very large series, bears a 
curious resemblance to A. cornutus, which is also from Guatemala, but known only 
from a single example ; the structural difference, however, forbids the supposition that 
they may be varieties of one and the same species. There is no tendency in A. arietis 
towards the great elevation of the latero-dorsal tubers of the thorax, and the projection 
of the base of the elytral carine which distinguish .4. cornutus; the general colour, too, 
and the form of the yellowish ram’s-horn marking across the suture are not quite the 
same. 
19. Acanthoderes borrei. 
Acanthoderes Borrei, Dugés, Ann. Soc. Ent. Belg. xxix.* 
Hab. Mzxico, Guanajuato (Duges). 
A species closely allied to A. circumflexus, but certainly distinct. In the extension 
to the shoulder of the broad pale streak of the elytra it approaches A. inguinatus. 
20. Acanthoderes —— ? 
Hab. Mezxico (Sallé). 
A single specimen, in very bad condition, of similar form to A. doctus, but evidently 
distinct, the thoracic dorsal tubercles being very small, and the elytra obtusely trun- 
cated. 
SYCHNOMERUS (to follow the genus Acanthoderes, p. 142). 
A gen. Acanthodere differt solum antennarum articulis 3°-11™ apice subtus dense barbatis, et 7°-11™ presertim 
in 2 multo abbreviatis, longius et densius barbatis. 
Two species of Central-American “ Acanthoderini” are here separated from Acantho- 
* The description of this species is unpublished as yet. 
