of the Amazon Valley. 473 



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 id., Dj. Cat.)* of liio Janeiro, which 

 possesses tarsi constructed as in the rest of the genus. 



13. Acanthoderes phasianus, n. sp. 



A. modice elongatus, depressus, tenuiter tomentosus, fulvo, flavo- 

 griseo, cano nigroque multifariam variegatus : thoracis tuberculis 

 dorsalibus fortissime elevatis : elytris apice late sinuato-truncatis, 

 angulis externis in spinas longas productis. Long. 6 lin. c? . 



Head piceous, varied with paler shades, two rounded fulvous 

 spots on the vertex, front uneven. Antennas much longer than the 

 body; basal joint black, with grey pile, remaining joints piceous, 

 third and fourth with two greyish rings, the rest pale at their bases. 

 Thorax with the lateral tubercles large, acute, the dorsal ones 

 very large, conical, the interstices punctured; dusky brown, with 

 fulvous streaks and spots. Elytra very slightly narrowed pos- 

 teriorly, very sparingly granulate-punctate near the base; the 

 centro-basal ridges produced forwards at the base, thence gra- 

 dually subsiding towards the middle : the colour towards the 

 base is brownish-black, varied on each elytron with four rounded 

 fulvous spots edged with grey ; the apical third is fulvous, edged 

 in front with greyish, but near the apex with brownish black ; 

 there is a comma-shaped whitish mark on the disk of each be- 

 fore the middle, a large dark-brown V-shaped mark behind the 

 middle; the rest is a combination of dusky brown, light grey, 

 and fnlvous minutely commingled. Body beneath shining black, 

 clothed with grey pile. Pcmora dusky, each with a large fulvous 

 spot : tibiae and tarsi spotted with fulvous and dusky, the third 

 and fourth tarsal joints being clear fulvous. The fore tarsi of 

 the g are strongly dilated and fringed. The presternum is 

 simple and rounded, the mesosternum subvertical and bituber- 

 culated. 



One example taken at S. Pauk>, on the Upper Amazon. 



* Acanthoderes cylindricus, n. sp. — Elongatus, parallelus, depressus. 

 Caput fuscum ; fronte plana, punctata, opaca ; vertice punctis duo- 

 bus ocellaribus nigris iridibus flavis. Antennae corpore longiores, 

 piceac, 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 

 densius prope basin, utrinque obsolete bicarinata; fulvo-brunnea, 

 apices versus grisco-varia, utrinque pone medium macula angulata 

 nigra notata. Subtus niger, pilis cinereis vestitus. Pedes fusci, 

 griseo-macidati. Sterna ut in A. pigmentato. Long. 8 lin. £. 



