472 Mr. H. W. Bates on the Longicorn Coleoptera 



wards the base only, the surface faintly punctured^ the punctures 

 numerous only near the sides towards the base ; on the disk they 

 are accompanied by granulations ; the colour is fulvous brown ; 

 there is an oblique ochreous spot on each, near the base, and a 

 waved transverse patch of the same colour near the apex, both 

 edged behind with dark brown ; the punctures are covered by 

 small dusky spots ; there is a strongly waved transverse spot 

 behind the middle, and three or four smaller ones on the mar- 

 gins, also dark brown ; the suture is tessellated with black and 

 grey. Body beneath black, clothed with shining silvery pile. 

 Femora piceous, clothed with grey pile ; tibi?e dusky, with two 

 pale rings, their apices and the first tarsal joint covered with 

 silvery pile j second and third joints black, tip of the latter and 

 claw-joint reddish testaceous; the third joint fulvous beneath. 

 The prosternum is sim])ly rounded ; the mcsostcrnum vertical 

 in front, and bituberculated. 



Taken in the forest on the banks of the Cupari, Tapajos region. 

 One example. 



12. Acanthoderes piffmentatus, n. sp. 



A. elongatus, subparallelus, deprcssus, tenuiter tomentosus, violaceo- 

 brunneup, flavo nigioqvie variegatus : antennis crassis corpore 

 iTiulto longioribus, aaticulis 3-4 fortius sulcatis : elytris apice trun- 

 catis, aiigulis cxternis productis. Long. 8 lin. d . 



Head plane in front, punctured, dusky brown, vertex paler 

 and ornamented w^ith 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 ccntro- 

 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- 

 brow^n 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 ai)ical spot is also 

 broadly margined with yellow ; each elytron has a short white 

 streak on the disk ; the ])unctures 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 ; tibiffi brown, with three pale rings ; tarsi fulvous, 

 second joint dusky. The pro- and mesostcrna arc both simply 

 rounded, tlicir surfaces closely ])uncturcd. Tlie fore tarsi of 

 the c? are slightly dilated; the liist joint of the middle and hind 

 tarsi are remarkably elongated for this genus. 



