of the Amazon Valley. 45 



the centro-basal ridges, which are slightly elevated, but crested 

 with black hairs ; the basal part only of the elytra is punctured; 

 the colour is reddish brown, with a light grey tinge near the 

 middle and apex, and a number of small blackish spots, besides 

 a short vitta, on the disk of each behind the middle, which has 

 at each end a whitish spot. Body beneath pale reddish, clothed 

 with ashy-brown tomentum ; legs reddish, ringed with ashy and 

 black. 



Taken at Ega, on dead branches. 



Genus Ch^tanes, nov. gen. 



Body oblong, convex, setose. Antennse one and a half times 

 the length of the body, stout, furnished with a few setae beneath. 

 Thorax rather narrow, widening slightly from the front ; lateral 

 spines distinct, acute, standing out from the sides, and placed at 

 a distance from the hind angles. Elytra with centro-basal 

 tubercles, surmounted each by a crest of hairs ; the rest of the 

 surface hispid, with tufts of short bristles and longer setae; 

 truncated at the tip. Legs stout; thighs abruptly clavate; 

 basal joint of tarsi equal in length to the second and third taken 

 together. Apical abdominal segment in the males with both 

 dorsal and ventral plates deeply notched, the angles of the ven- 

 tral plate produced into spines : ovipositor elongated in the $ ; 

 dorsal plate acute lanceolate, ventral truncated. Mesosternum 

 in the 6 plane, in the $ tumid, as in Trypanidius. 



The only species which I have at present seen belonging to 

 this genus has the bulk and general form of the Trypanidii ; but 

 it differs from them by the presence of crested centro-basal 

 tubercles on the elytra, and by the absence of tubercles on the 

 mesosternum in the male sex. 



Chatanes setiger, n. sp. 



C. oblongo-ovatus, fuscus, fulvo cinereoque varius : antennis pedibus- 

 que squamis cinereis sparsis : elytris apice utrinque macula tri- 

 augulari nigra velutina liturisque cinereis. Long. 5-6^ lin. S $ • 

 Head dull black, sprinkled with tawny-coloured hair-scales. 

 Antennse scarcely one and a half times the length of the body, 

 even in the males, dull black, sprinkled with minute ash-coloured 

 hair-scales; the bases of the joints (from the fourth) ashy; 

 sparingly setose beneath, the second joint having a little tuft of 

 stiff hairs. Tliorax moderately convex, widened from the front 

 to the bases of the lateral spines, which are small and acute, and 

 placed at a short distance from the hind angles; the surface dull 

 black, variegated with tawny; sides (below the spines) ashy- 

 tawny, sprinkled with black. Elytra oblong oval, briefly and 

 rather obliquely truncated at the apex, moderately convex ; sur- 



