430 Mr. H. W. Bates on Cemmhycidce 
Sub-fanii Dorcacerin^. 
Genus Dorcacerus. 
Latr. Kegne Anim. (ed. ii.) v. Ill; Lacord. Gen. ix. 193. 
1. Dorcacerus harhatus. 
Cerambix harhatus ^ Oliv. Ent. No. 67,p. 610^ pi. xiii. f.94. 
Magnus, purpureo-fuscus, opacus, thoracis marginibus, 
scutello, suturaque postice aureo-tomentosis ; fronte et 
tuberibus magnis antenniferis longe rufo-birsutis. 
Long. 12-15 lin. c? ? • 
Hah . — Santarem ; not uncommon on trunks of trees 
from which sap is exuding. 
Sub-fam. Trachyderin^. 
Genus Trachyderes. 
Dalman, Schon. 8301 . Ins. hi. 264; Lacord. Gen. ix. 201. 
1. Trachyderes succinctus. 
Ceramhyx succinctus, Linn. Mus. Lud. Ulr. p. 72. 
Trachyderes cayennensis, Dupont, Mag. Zool. 1836, p. 34, 
pi. clvi. f. 1 . 
Castaneus, glaber; elytris paulo ante medium fascia 
flavo-testacea, interdum fusco-marginata ; antennis nigris, 
articulis plurimis basi fulvis ; pectore abdomineque fulvo- 
ferrugineis. 
S articulo basali antennarum clavato, haud dilatato. 
Long. 9-14 lin. S ? • 
Hah. — Amazons; generally distributed and common. 
The larva feeds in the interior wood of trees ; the perfect 
insect is found at sap and on the trunks of felled trees. 
Dupont applied the Linnasan name succinctus to the 
South Brazilian species, a local form which has a black 
abdomen ; although Linnaeus expressly says abdomen 
ferrugineum^^ and Habitat Surinami.^^ The true succinc- 
tus Dupont named cayennensis, 
I have specimens from Panama, which do not differ 
from those of the Amazons. 
