60 Mr. H. W. Bates on 



1. Mallaspis scutellaris. 



Oliv. Ent. QQ, p. U, pi. 2, a. b. 



M. obscure senea, elytris basi excepta cinnamoneis, 

 thorace lateribus antice rotundatis et multidenticu- 

 latis, antennis articulis 4-7 basi et apice 8-11 totis 

 rufis^ c? corpore multo longioribus articulis com- 

 pressis denticulatis, $ brevioribus articulis dilata- 

 to-compressis. 



Extremely rare ; found only at Nauta, on tlie Upper 

 Amazons. 



Genus Pyegdes. 

 Serville ; Lacord. Genera, viii. p. 177. 



1 . Pyrodes pulch errimus . 



P. pulclierrimus, Perty, Del. An. Art. Bras. p. 8Q, t. 17, 



f . 4, ? . 



P. fastuosus, Ericbs. Consp. Ins. Col. Peru. p. 139, ? . 



P. heterocerus, Erichs. Consp. Ins. Col. Peru. p. 139, c?. 



P. antennatus, White, Cat. Long. Brit. Mus. p. 51, pi. 2, 



f. 6, S; Lucas, Voy. de Castelnau, Ins. pi. 



10, f. 8, S. 



P. jpetalocerus, White, Cat. Long. Brit. Mus. p. 50, S • 



S . Medio valde convexus, colore variabilis, fusco- 

 ferrugineus vel seneo-fuscus, vel antice ferrugineo- 

 cupreus, postice ferruginous; scutello apice prolon- 

 gate ; antennis articulo tertio magno lato compresso, 

 azureo, reliquis rufis ; capite thorace et scutello 

 crebre eequaliter 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. Variat thorace 

 maculis duabus rufis. 



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. 



