of the Amazon Valley. 151 



with four curved tawny spots arranged in a quadrangle on the disk, 

 and embracing in their curves so many dark-brown spots. Elytra 

 subovate, convex; apex briefly and obliquely truncated, outer 

 angle of the truncature slightly produced ; surface punctured 

 towards the base, dark brown; disk and suture bluish grey, 

 speckled with brown ; parallel to the suture is a row of small 

 tawny patches, and in the middle of the lateral margin a tri- 

 angular patch of the same hue. Body beneath and legs clothed 

 with fine ashy pile ; thighs not very thickly clubbed. 



? Ovipositor short, projecting very little beyond tips of ely- 

 tra; dorsal plate plane, and rounded at the tip, ventral trun- 

 cated. 



Found both on the Upper and Lower Amazons, on dead 

 branches*. 



*3. Nyssodrys cinerascens, n. sp. 

 N. oblongo-ovata, parum convexa, obscure brunnea, cinereo macu- 

 lata et conspersa : thoracis spiais lateralibus conicis, prope angulos 

 posticos sitis : elytris breviter oblique truncatis, angulis exteriori- 

 bus productis. Long. 4-4| lin. c? $ . (6 exempl.) 

 Head black, with fine ashy pile. Antennae reddish, tips of 

 joints, from the third, black. Thorax widened from the front 

 to the tips of the lateral spines, which are conical and placed 

 near the hind angles, thence narrowed in a very oblique line to 

 the base; disk dark brown, with several ashy marks, four of 

 which form in the middle two subinterrupted vittse. Elytra 

 subovate, slightly convex ; apex briefly and obliquely truncated, 

 outer angle of the truncature distinctly produced ; surface punc- 

 tured towards the base, dark brown, with patches of ashy-grey on 

 the disk, speckled with dark brown, and with a number of small 

 patches of ashy grey lying parallel to the suture. Body beneath 

 and legs black, clothed with fine ashy pile. 



S Terminal dorsal plate obtusely sinuated at the tip, ventral 

 rather deeply and semicircularly notched. 



$ Ovipositor projecting one-third of a line beyond the tips 

 of the elytra; dorsal plate tapering to the tip, but rounded, 

 ventral truncated. 

 Common at Para. 



4. Nyssodrys corticalis, n. sp. 



N. elliptica, convexa, sordide fulva, brunneo vittata : thoracis spinis 

 lateralibus conicis prope angulos posticos sitis: elytris oblique 

 truncatis, angidis (prsecipue suturalibus) obtusis. Long. 4^ lin. $ . 



* There is an example of this species in Mr. Bakewell's collection, 

 ticketed " South America " (probably from Cayenne), which has the tawny 

 marks very clear ; but the four spots on the thorax are nearly straight, and 

 almost form two tawny vittse. 



