of the Amazon Valley. 103 



the apex; surface punctured, and furnished with three faint 

 raised lines, on which rise a few small elevations, surmounted 

 each by a minute pencil of black hairs; the colour is hoary 

 white, except at the apex, which has a large brown spot re- 

 mounting in an angle on the suture ; the sides near the base 

 have also a thick blackish line. Legs and underside greyish, 

 varied with brown. 



One example taken at Obydos. 



3. Leptostylus ovalis, n. sp. 



L. curtus, ovatus, convexus, riigrinus : thoracis dorso trituberculato, 

 tuberculis lateralibus obtusis. Long. 3 lin. 



Head olive-grey, with minute black spots. Antennse with the 

 three basal joints dark grey, speckled with black; the remainder 

 grey, with the tips blackish. Thorax with an elevation on the 

 front part of the disk, surmounted by three obtuse tubercles ; 

 the lateral tubercles very obtuse : punctured, scantily clothed 

 with dark grey pile irrorated with black. Elytra short, ovate, 

 very briefly truncated at the tip, coarsely punctured, and fur- 

 nished with rows of small tubercles, each surmounted by a short 

 pencil of black hairs ; the colour is sooty black, with scanty dark 

 grey pile, but towards the apex the grey pile forms a patch 

 speckled with black. Beneath iron-grey, slightly shining. Legs 

 grey, speckled with black. 



Found at Obydos and Para, on slender dead twigs. 



4. Leptostylus ohscurellus, n. sp. 



L. elongato-ovatus, fuliginosus : thorace brevi, dorso inseqiiali, tuber- 

 culis lateralibus prominentibus. Long. 3 lin. 



Head clothed with sooty pile ; antennse of the same hue, with 

 the bases of the joints (after the third) pallid. Thorax small 

 compared with the elytra ; disk very iineven, the depressed parts 

 coarsely punctured, the lateral tubercles prominent ; colour sooty. 

 Elytra elongate- ovate, the broadest part being about two-thirds 

 their length, the tip not perceptibly truncate; their surface is 

 thickly punctured, and is furnished with a few small tubercles 

 or ridges crested with hairs, as in the allied species ; the colour 

 is sooty, with a few spots of white pile on the disk, sometimes 

 forming a patch near the apex. Beneath grey; legs sooty, 

 varied with grey ; base of the thighs pallid. 



Taken on slender dry twigs, in the suburbs of Santarem. 



Group Leiopodina. 

 Genus Amniscus (Dej. Cat.). 

 Besides the species taken to form the genus Leptostylus, the 



