of the Amazon Valley, 475 



punctured only on the fore and hind margins. Elytra with the 

 centro-basal ridges much produced at the base, prolonged behind 

 as smooth flexuous carina?, to the apex; sparingly granulate- 

 punctate on the ridges and on the sides near the base ; the 

 colour is fulvo-ferruginous, with a rosy tinge ; near the base of 

 each are two fulvous-yellow spots, and near the apex a large spot 

 of the same coloui*, all encircled with dark brown ; there are, 

 besides, a few hoary-white specks scattered over the surface. 

 Beneath, the body is black clothed with hoary pile, the apical 

 half of the abdomen being yellow spotted with white pile. Fe- 

 mora black at the base, rusty-yellow on their apical halves ; the 

 tibia? and tarsi are silky orange-yellow, the former ringed with 

 dusky, the latter shining. The fore tarsi of the S are broadly 

 dilated and densely fringed. The opposing faces of the sterna 

 are vertical and bituberculate. 



At Ega, on severed and hanging woody lianas in new clearings. 

 I consider it a local variety of the following, from which it differs 

 in the more vivid coloration. 



17. Acanthoderes lotor, White. 



Acanthoderes lotor, White, Cat. Long. Col. in Brit. Mus. ii. p. 362. 



The shape, sculpture, form of sterna, &c, are precisely the 

 same as in A. chrysopus. I met with it only at Carepi, neat- 

 Para. 



18. Acanthoderes lateralis, n. sp. 



A. modice elongatus, subdepressus, postice attenuatus, tomentosus, 

 cinereo-brunneus, thoracis lateribus, maculisque duobus elytrorum, 

 altera magna triangulari pone medium, altera parva prope apicem 

 ssepe obsoleta, fuscis : elytris apice truncatis, angulis externis spina 

 longa armatis. Long. 6-8 lin. 3 $ . 



Head sooty-black, front and vertex ashy-brown. Antenna? 

 about as long as the body, dusky, the third joint ringed with 

 grey, 4-11 joints at the base testaceous grey. Thorax with the 

 lateral tubercles prominent and acute, the dorsal ones prolonged 

 into ridges, the dorsal line also forming a narrow ridge generally 

 denuded ; interstices punctured, ashy-brown, the sides sooty- 

 black. Elytra narrowed to the apex, which is briefly truncate, 

 the external angles being produced into long spines ; the centro- 

 basal ridges are feebly raised at the base, but prolonged behind 

 each as a flexuous carina, which subsides at two-thirds the length; 

 the basal half is rather thickly granulate-punctate ; in colour they 

 are ashy-brown, with a large triangular spot on the side behind 

 the middle, and a small irregular one near the tip, silky dark 

 brown. Beneath and legs black, clothed with ashy pile ; tibia? 

 with two pale rings. The fore tarsi of the 6 are widely dilated 



