432 Mr. II. W. Bates on Ceramhycidce 



5. Trachyderes melas, n. sp. 



T. succincto statura formaque thoracis simillimus, differt 

 colore toto nigro, antennarum articulis 4-6 basi, 10-11 

 totis rufis exceptis ; antennis $ multo longioribus. 



Long. 10 lin. $ . 



Ilah. — Obydos. 



The antennae in the female are half as long again as 

 the body ; in the same sex of T. succinctus they are very 

 little longer than the body. In the black colour of its 

 legs, it resembles T. nigripes (Dupont) , but it belongs to 

 a difterent division of the genus from that species ; the 

 form of its thorax is precisely that of T. succinctus. * 



6. Trachyderes impunctipennis, n. sp. 



T. succincto similis, dififert corpore (prsecipue elytris) 

 multo longiori; thorace lateribus antice rotundato et 

 prope angulum anticum hand tuberculato, dorso postico 

 tri-tuberoso (hand piano et in medio depresso, ut in T. 

 succincto); elytris omnino impunctatis, apice sinuato- 

 truncatis. Castaneus, elytris fascia ante medium tlavo- 

 testacea ; antennis $ articulis 3-5 basi rufis, 8-11 totis 

 flavis ; corporo subtus rufo-castaneo. 



Long. 10 lin. ? . 



Hah. — Santarem. 



Closely allied to Dupont's T. Lacordairci, differing only 

 in the colour of the autenna3 and under-surface of the 

 body. It may perhaps be only a variety of that species. 



From the nearly allied T. LatreiUci it differs in many 

 essential respects, being a broader and more robust 

 insect, and very distinct in its colours. 



* The following very distinct species of the succinctus group has not 

 yet been described, althougb common in collections : — 



Trachyderes politas, (Cbevr., MS.)- 



Latior, la?\'i8, planatus, nigro-castaneus, capite, thorace supra, scutello, 

 humeris, et mesosterni medio, rufo-castaucis ; thoracis forma ut in T. suc- 

 cincto ; elytris apice latis, prope suturam obtuse tnmcatis ; antennis nigris, 

 upucis, i longissimis, articulis 10-11 basi fulvis, $ articulis 10-11 rufis. 



Long. 10-13 lin. <J ? . 



Hal. — Vcuezuela. 



