50 
Mr. H. W. Bates on 
1. Mallaspis scutellaris. 
Oliv. Ent. 66^ p. 14^ pi. 2^ a. b. 
M. obscure 93nea_, elytris basi excepta cinnamoneisj 
tliorace lateribus aiitice rotundatis et multidenticu- 
latis^ an tennis articulis 4-7 basi et apice 8-11 totis 
rufisj S' corpore multo longioribus articulis com- 
pressis denticulatis^ $ brevioribus articulis dilata- 
to-compressis. 
Extremely rare ; found only at E'auta^ on the Upper 
Amazons. 
Genus Pyeodes. 
Serville ; Lacord. Genera, viii. p. 177. 
1. Fyrodes pulcliGTrimus. 
P. pulcherrimusj Perty, Del. An. Art. Bras. p. 86, t. 17, 
f. 4, $ . 
P. fastuosusj Ericbs. Consp. Ins. Col. Peru. p. 139, ? . 
P. heterocerus, Erichs. Consp. Ins. Col. Peru. p. 139, cJ. 
P. antennatusj White, Cat. Long. Brit. Mus. p. 51, pi. 2, 
f. 6, S‘, Lucas, Yoy. de Castelnau, Ins. pi. 
10, f. 8, c?. 
P. petaloceruSj White, Cat. Long. Brit. Mus. p. 50, S- 
S. Medio valde convexus, colore variabilis, fusco- 
ferrugineus vel geneo-fuscus, vel antice ferrugineo- 
cupreus, postice ferrugineus; scutello apice prolon- 
gate ; antennis articulo tertio magno lato edmpresso, 
azureo, reliquis ruhs ; capite thorace et scutello 
crebre sequaliter punctatis ; elytris vermiculato-coria- 
ceis ; femoribus cyaneis. 
$ . Azureus vel cyaneus, elytris rugulosis nitidis, 
fascia lata ante medium flavescenti-alba ; antennis 
cyaneis, articulo tertio simplici lineari, Y ariat thorace 
maculis duabus ruiis. 
This beautiful and singular species was not infrequent 
at Ega. The two sexes, as here described, have always 
been considered distinct species ; but the fact that all of 
one form are males, and all of the other females, and that 
they are invariably found together, on the trunks of trees, 
induces me to consider them as pairs, although I never 
ound them in copula^ 
