190 HETEROMERA. 
P. sobrinum, Chevr.: N. discolor is recorded from “ Brésil, de Vénézuela et jusq’au 
Texas”’?; V. texana from Texas. 
11. Platydema ferrugineum. 
Platydema ferrugineum, Chevr. Petites Nouv. Ent. ii. p. 186". 
Platydema bi-impressum, Chevr. loc. cit. p. 214”. 
Hab. Muxico1? (coll. F. Bates), Toxpam, Cordova (Sallé), Jalapa (Hoge); Guatz- 
MALA, Capetillo, Las Mercedes (Champion); Panama, Volcan de Chiriqui (Champion). 
Determined from typical examples in Mr. F. Bates’s and M. Sallé’s collection. 
This is another variable and rather puzzling species ; oblong ovate in form, moderately 
convex, the upper surface uniform dark ferruginous, sometimes almost black. From 
the numerous opaque velvety-black species it may be known by its comparatively 
elongate form, and long legs and antenne; it varies in size from 6—9 millimetres. The 
four examples from Guatemala and the State of Panama are rather more convex, 
and have the elytral strize more deeply impressed, than numerous individuals from 
Mexico. 
12. Platydema fuliginosum. 
Platydema fuliginosa, Lap. & Brullé, Ann. Sciences Nat. xxiii. p. 874". 
Hab. Mexico }. 
I am unable to satisfactorily identify this species, the only one of the genus ascribed 
to our country by Laporte and Brullé, among the very large number of specimens before 
me: it is more than probable, however, that it represents one or the other of the 
species here enumerated. ‘To judge from the description, P. fuliginoswm should be 
nearest to P. subguadratum, though no mention is made of the pale apical joint to the 
antenne. 
13. Platydema melancholicum. 
Ovate, rather broad, moderately convex, black, opaque. Head slightly shining, transversely impressed in 
front, finely and closely punctured, the epistoma defined by a fine shallow impressed line, the anterior 
margin red ; palpi piceous ; antenne short, about reaching to the base of the prothorax, the seventh to 
the tenth joints broad and transverse, the two basal joints, the third joint, and the extreme apex 
indistinctly, red, the rest black ; prothorax transverse, the sides scarcely rounded and converging from 
the base, the base (feebly) and apex bisinuate, the anterior angles obtuse, the surface (if viewed with a 
lens) exceedingly finely and rather closely punctured; scutellum large, scutiform ; elytra a little wider 
than the prothorax at the base, feebly rounded at the sides, regularly punctate-striate (the punctures 
deeply impressed and towards the sides placed not very close together), the interstices smooth ; legs red, 
the tibie slightly infuscate ; beneath (and the epipleure) shining, reddish brown. 
Length 43-5 millim. 
Hab. Guatemata, San Joaquin (Champion). 
Two examples, Comparatively shorter and broader than P. subquadratum ; of the 
