27 
claw-joint reddish testaceous ; the third joint fulvous beneath. 
The prosternum is simply rounded ; the mesosternum vertical 
in front, and bituberculated. 
Taken in the forest on the banks of the Cupari, Tapajos region. 
One example. 
12. Acanthoderes pigmentatuSy n. sp. 
A. elongatus, subparallelus, depressus, tenuiter tomentosus, violaceo- 
brunneus, flavo nigroque variegatus ; antennis crassis corpora 
multo longioribus, articulis 3-4 fortius sulcatis : elytris apice trun- 
catis, angulis exteruis productis. Long. 8 lin. S • 
Head plane in front, punctured, dusky brown, vertex paler 
and ornamented with two round black spots. Antennse thick, 
brown, each joint from the third with two pale rings. Thorax 
with the lateral tubercles prominent, their apices produced and 
acute ; the dorsal tubercles strongly raised, but obtuse, inter- 
stices punctured ; violet-brown, with fulvous patches. Elytra 
gradually but very slightly narrowed posteriorly, the centro- 
basal ridges very feebly raised, granulated ; their whole surface 
sparingly but coarsely punctured ; the colour is violaceous 
brown, varied on each elytron with three discoidal angular dark- 
brown patches, viz. one near the base, one behind the middle, and 
the third near the apex ; there is, besides, a transverse bowed 
yellowish streak behind the basal patch ; the apical spot is also 
broadly margined with yellow ; each elytron has a short white 
streak on the disk ; the punctures are each covered with a dusky 
spot; the suture is tessellated with black and grey. Beneath 
and femora black, slightly shining, but clothed with yellowish- 
grey pile ; tibiae brown, with three pale rings ; tarsi fulvous, 
second joint dusky. The pro- and mesosterna are both simply 
rounded, their surfaces closely punctured. The fore tarsi of 
the are slightly dilated ; the first joint of the middle and hind 
tarsi are remarkably elongated for this genus. 
One individual, taken at Tabatinga, on the Peruvian frontier. 
In the slenderness of the tarsi this species differs greatly from 
the rest of its congeners. This, however, is evidently merely a 
specific character, as the species is extremely nearly allied to 
A. cylindricus [jEgomorphus idi.iT>]. Cat.)* of Bio Janeiro, which 
possesses tarsi constructed as in the rest of the genus. 
* Acanthoderes cylindricus, n. sp. — Elongatus, parallelus, depressus. 
Caput fuscum ; fronte plana, punctata, opaca ; vertice punctis duo- 
bus ocellaribus nigris iridibus flavis. Antennse corpore longiores, 
picese, griseo-maculatse. Thorax punctatus, fuliginosus, sericeus 
fulvo-variegatus, tuberibus lateralibus magnis, spiniferis, dorsalibus 
conicis acutis. Elytra perparum attenuata, apice sinuato-truncata, 
angulis internis acutis, externis productis, passim granulato -punctata 
E 2 
