188 HETEROMERA. 
Mr. F. Bates’s collection. The length given (20 millim.) is evidently a misprint for 
10 millim.; the insect varies in size from 92-114 millimetres. 
8. Platydema angulatum ? 
Platydema angulatum, Chevr. Petites Nouv. Ent. ii. p. 186’. 
Hab. Mexico!. 
Three examples from Parada, in M. Sallé’s collection, are labelled as above ; they 
may or may not represent Chevrolat’s species. The following is the description :— 
“Ovale, aterrimum, opacum, elongatum; capite antice rotundato, rubro-marginato, | 
ante oculos sulcato ; labio, palpis, antennis, epipleuris pedibusque rubris; prothorace 
transverso, supra scutellum modice rotundato, lateribus anguste sulcato atque rubido ; 
scutello triangulari; elytris tenue sulcatis, in sutura angulatis—Long. 6% millim., 
lat. 32 millim.—Mexico.” 
** L’angle terminal de la suture est la caractére distinctif de cette espéce.” 
The above mentioned examples from Parada certainly represent a distinct species, 
which may be known from P. rotundatum by its flatter and more parallel form ; the 
head slightly shining, and finely, evidently, but not closely punctured; the antenne 
ferruginous, the four or five outer joints slightly darker; the anterior margin of the 
thorax distinctly bisinuate ; the elytra somewhat depressed, and finely and shallowly 
punctate-striate, the punctures not closely placed. If it should prove to be not 
identical with P. angulatum, the species might be called sallei. 
In these examples I fail to detect any distinct difference in the sutural angle of the 
elytra (the chief character for P. angulatum, according to the describer) between this 
and the allied species. 
9. Platydema subquadratum. 
Neomida subquadrata, Motsch. Bull. Moscou, xlvi. pt. 1, p. 477 (1878)'. 
Platydema ventrale, Chevr. Petites Nouv. Ent. ii. p. 186 (1877)?. | 
Platydema janus, Horn, Rev. Ten. of Am. north of Mexico, p. 882° (nec Fabr., and Lap. & 
Brullé). 
Platydema pernigrum, Casey, Contrib. to the descriptive and systematic Coleopterology of North 
America, part i. p. 49 (1884)*; Horn, Entom. Americana, i. pp. 111, 113. 
Hab. NortH America, Southern States %, Arizona 4——MeExico, Presidio (forrer), 
Vera Cruz, Cosamaloapam (Sallé*), Jalapa (Hoge); British Honpvras, R. Sarstoon, 
R. Hondo (Blancaneaux) ; GuateMata, Zapote, San Gerénimo, San J oaquin, Chacoj 
(Champion) ; Nicaragua, Granada (Sallé); CenrraL America 1, 
A common species in Mexico and Guatemala, extending northwards into California, 
Arizona, and New Mexico, and southwards to Nicaragua. 
P. subquadratum may be known amongst its allies by the closely punctured head, 
