New Genera and Species of Phytophaga. 257 
Sp. 4. Metaxycera Amazona. 
Anguste obcuneiformis, dorso depressa, rufo-testacea, nitida, 
supra subnitida ; antennis, vertice, thoracisque lateribus nigris; 
elytris obscure nigro-zneis, apice obtusis, utrisque vitta lata 
discoidali, a basi ad paullo pone medium extensa, plerumque 
apice extrorsum ampliata, fasciaque lata pone medium, ex- 
trorsum abbreviata, postice recte truncata aut concava, antice 
convexa, rufo-testaceis. 
Var. A. Vertice thoracisque lateribus rufis ; elytris nigris, ut in 
typo maculatis. 
Long. 4 lin. 
Hab. Amazons. Collected by Mr. H. W. Bates. 
Sides of thorax straight and parallel behind the middle, obliquely 
converging from the middle to the apex, and forming an obtuse 
angle with the hinder half; surface coarsely punctured, punctures 
crowded on the sides, more distant on the disc, the latter impressed 
with a broad longitudinal groove, which terminates behind at a 
transverse depression in front of the basal margin. 
This species is very closely allied to M. trimaculata, Oliv. It may 
be, however, distinguished from that insect by the following cha- 
racters : in M. Amazona the thorax is broader and more distinetly 
angled on the sides, the longitudinal groove on its upper surface 
being broader and very deeply impressed ;_ the scutellum is always 
red; the elytra are rather less coarsely punctured and more opaque, 
the costze being also somewhat narrower; the transverse rufous 
patch is placed at a greater distance from the apex of the elytra, 
is broader, and has its front edge strongly rounded, its hinder 
border being either truncate or slightly concave. In M. tri- 
maculata the antennz are rather more robust; the thorax is 
narrower (in some specimens almost conic), less distinctly angled 
on the sides, the upper surface less flattened, the longitudinal 
groove, although visible, being also much narrower and less deeply 
impressed; the scutellum is usually black, rarely wholly or in 
part rufous; the elytra are more coarsely punctured, the coste 
being broader and more nitidous; the longitudinal rufous vitta is 
narrower, its hinder half not dilated towards the outer margin; it 
is also usually interrupted in the middle to form two linear patches; 
the subapical transverse patch is narrow, and placed much nearer 
the apex of the elytra, its anterior border, instead of being rounded, 
is nearly straight and bisinuate, and its hinder margin is either 
straight or very slightly convex. 
Collection of Mr. Bates, and my own. 
