430 Mr. H. W. Bates on Cerambycidce 



Sub-fam. DoRCACERiN^. 



Genus Doecaceeus. 



Latr. Regne Anim. (ed. ii.) v. Ill; Lacord. Gen. ix. 193. 



1. Dorcacerus barhatus. 

 Cerambix barbatus, Oliv. Ent. No. 67, p. 610, pi. xiii. f.94. 



Magnus, purpureo-fuscus, opacus, thoracis marginibus, 

 Bcutello, suturaque postice aureo-tomentosis ; fronts et 

 tuberibus magnis antenniferis longe rufo-hirsutis. 



Long. 12-15 lin. c? ? . 



Hab, — Santarem ; not uncommon on trvmks of trees 

 from which sap is exuding. 



Sub-fam. TRACHYDEEINiE. 



Genus Teach ydeees. 



Dalman, Schon. Syn. Ins. iii. 264; Lacord. Gen. ix. 201. 



1. Trachyderes succinctus. 



Cerambyx 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. 



<$ articulo basali antennarum clavato, baud dilatato. 



Long. 9-14 lin. $ ^ . 



Hab. — 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 Linntean name succinctus to the 

 South Brazilian species, a local form which has a black 

 abdomen ; although Linnceus 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. 



