279 
of the Amazon Valley. 
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. 
Hah . — Ega and Pebas, Upper Amazons ; two males. 
Genus Appula. 
Thomson, Syst. Ceramb. p. 245 ; Lacord. Gen. viii. 322. 
1. Appula nigripeSj U. sp. 
A. lateraU 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 gequali, 
linea dorsali abbreviata glabra; elytris ante apicem ro- 
tundatis, recte truncatis, angulo exterior! spinoso, sutu- 
rali producto, supra sparsim hirsutis et punctatis, medio 
maculis et fasciis nigris, apice certo situ nigricantibus ; 
pedibus validis, setosis, femoribus paullo 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 thorax, 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. 
Hah . — Tapaj os. 
X 2 
