of fJic Amazon Valley. 279 



to the dense changeable silky pile with which the surface 

 is clothed. This silvery or pale golden pile seems spread 

 over the whole elytra, but black markings always appear, 

 which vary according to the position in which the insect 

 is held ; their most constant form, however, appears to 

 be that of an undulating belt near the base, and an 

 oblique belt (from the suture rearwards towards the 

 margin) about the middle. The under-surface of the 

 body is clothed with a similar silky pile, but the throat 

 and the centre of the breast have a very dense beard of 

 long pale soft hairs. 



Hab. — Ega and Pebas, Upper Amazons ; two males. 



Genus Appula. 

 Thomson, Syst. Ceramb. p. 245 ; Lacord. Gen. viii. 322. 



1. Appula nigripes, n. sp. 



A. laterali et undulante (White) differt corpore magis 

 cylindrico elytrisque multo brevioribus ; pube nigra 

 argenteo-sericea vestita; thorace cylindrico, antice et 

 postice constricto, medio paulo rotundato, supra sequali, 

 linea dorsali abbreviata glabra ; ely tris ante apicem ro- 

 tundatis, recte truncatis, angulo exteriori spinoso, sutu- 

 rali producto, supra sparsim hirsutis et punctatis, medio 

 maculis et fasciis nigris, apice certo situ nigricantibus ; 

 pedibus validis, setosis,, femoribus pauUo incrassatis. 



Long. 8 lin. 



Resembles much Mallocera glauca and amazonica, in 

 the silky changeable pile with which it is clothed, and 

 the vague black markings of the elytra, but differs in the 

 long single exterior spine of the middle and hind femora, 

 which in this group is a tolerably stable generic character. 

 The thoi-ax, too, has no trace of tubercles, either on the 

 sides or disc, and in this respect the insect recedes more 

 from the Mallocera type than do Appula lateralis and 

 undulans. The elytra, instead of the short dense black 

 bristles, have a more scanty clothing of fine long erect 

 hairs. 



ILi h . — Tapaj OS . 



x2 



