432 Mr. H. W. Bates on Cerambycidce 
5. Trachyderes melasj 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. 9 . 
Hah. — Obydos. 
The antennas 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 different division of the genus from that species ; the 
form of its thorax is precisely that of T. succinctus. * 
6. Trachyderes impunctipennisj n. sp. 
T. succincto similis, differt corpore (prascipue elytris) 
multo longiori; thorace lateribus antice rotundato et 
prope angulum anticum haud tuberculato, dorso postico 
tri-tuberoso (haud piano et in medio depresso, ut in T. 
succincto) ; elytris omnino impunctatis, apice sinuato- 
truncatis. Oastaneus, elytris fascia ante medium flavo- 
testacea ; antennis $ articulis 3-5 basi rufis, 8-11 totis 
flavis ) corpore subtus rufo-castaneo. 
Long. 10 lin. $ . 
Hah. — Santarem. 
Closely allied to Dupont’s T. Lacordairei, differing only 
in the colour of the antennas and under- surface of the 
body. It may perhaps be only a variety of that species. 
From the nearly allied T. Latreillei 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, although common in collections : — 
Trachyderes politus, (Chevr., MS.)* 
Latior, Iffivis, planatus, nigro-castaneus, capite, thorace supra, scutello, 
humeris, et mesosterni medio, rufo-castaneis ; thoracis forma ut in T. suc- 
cincto ; elytris apice latis, prope suturam obtuse truncatis ; antennis nigris, 
opacis, d' longissimis, articuhs 10-11 basi fulvis, $ articuhs 10-11 rufis. 
Long. 10-13 lin. d* ? • 
Hah. — Venezuela. 
