431 
of the Amazon Valley. 
2. Trachyderes Beichei. 
Dupont, Mag. Zool. 1836, p. 31, pi. civ. . 
Castaneus, glaber ; ely tris fascia paulo ante medium, et 
macula apicali triangular! ad angulum suturalem, flavo- 
testaceis ; tborace angulis posticis testaceis. 
d' articulo basali antennarum maxime dilatato, 
difformi ; ? crasso, rotundato. 
Long. 10-16 lin. d' 9 . 
Also generally distributed throughout the Amazon 
region. The thorax is of the same form as in T. succinc- 
tus, and the colours of body and limbs offer no constant 
difference. 
3. Trachyderes cingulatus. 
King, Nov. Act. Ac. Csbs. L. C. Nat. Cur. xii. 456. 
T. Beichei proximo affinis, differt colore purpurascenti- 
nigro, elytrorum macula flava apicali elongata suturali 
per marginem apicalem haud extensa; corpore subtus 
omnino nigro-nitido. 
Long. 9-14 lin. ? . 
Hab. — Para, Four examples, all females ; quite dis- 
tinct from T. Beichei. 
4. Trachyderes rhodopusj n. sp. 
T. succincto affinis, thorace elongatiori et angustiori, 
dorso postice piano, lateribus antice (angulo antico ex- 
cepto) haud tuberculatis ; fascia elytrorum longe ante 
medium et antice in medio ad scutellum extensa ; corpore 
subtus pedibusque rufis \ elytris sparsim punctulatis, 
apice breviter sinuato-truncatis ; antennis $ articulis 
7-11 totis nigris, 7-10 valde abbreviatis, serratis. 
Long. 54 lin. $ . 
Hab. — Santarem. 
Apparently allied to T. rubripes (Dupont), but dif- 
fering from the description in several essential points. 
By the form of the thorax it belongs to DuponPs fifth 
division, and not to the first, in which T. rubripes i^p\acQdi. 
