SAPTINE.—-PLATYDEMA, 181 
the antennary orbits not extended, the epistoma short and not clearly defined; eyes not very large, 
slightly oblique; prothorax convex, transverse, narrowing from the base; scutellum triangular ; elytra 
convex, coarsely punctate-striate ; legs slender, the outer apical angles of the tibiee armed with a distinct, 
fine tooth, the first joint of the posterior tarsi longer than the two following: joints united; prosternum 
horizontal, triangularly produced, margined within, and received by the narrow and deeply excavate 
V-shaped mesosternum ; epipleurs extending to the apex of the elytra; trochantin distinct; form oval, 
convex. 
A new genus is required for a small insect found in Mexico by Herr Hoge. The 
structure of the head, antenne, &c. forbids association with Platydema; Saptine willbe 
known from itsallies by the ovate, convex form, the slender basal joints of the antenne, 
the deflexed anterior angles of the prothorax, and other characters given above. 
1. Saptine ovata. (Tab. VIII. tig. 10.) | 
Obovate, convex, bronze-black, shining. Head coarsely and rather closely punctured; antenne with the two 
basal joints, and the apical one, ferruginous, the rest black; prothorax convex, rapidly narrowing from 
the base, the sides rounded anteriorly, the anterior angles deflexed and rounded and not projecting out- 
wardly, the apex broadly emarginate, the base strongly bisinuate and with a distinct oblique fovea on 
each side, the surface regularly, somewhat. coarsely, and not very closely punctured; elytra the width 
- of the prothorax at the base, widest in the middle, coarsely punctate-striate, the interstices feebly convex 
outwardly and very finely and closely punctured; legs dark ferruginous ; beneath brownish black, shining, 
with very coarse scattered impressions. 
Length 3} millim. 
Hab. Mexico, Jalapa (Hage). 
One example. 
PLATYDEMA. 
Platydema, Laporte & Brullé, Annales des Sciences Naturelles, xxiii. p. 350 (1831) ; Mulsant, Col. 
de France, Latigénes, p. 211; Lacordaire, Gen. Col. v. p. 304; Horn, Rev. Ten, of America 
north of Mexico, p. 380. 
Typhobia, Pascoe, Ann. & Mag. Nat. Hist. 4th ser. iii. p. 279. 
Neomida, Motschoulsky, Bull. Moscou, xlvi. part 1, p. 476. 
Histeropsis, Chevrolat, Petites Nouv. Ent. ii. p. 221 (1878). 
This genus is well represented in the temperate and tropical regions of both hemi- 
spheres, and contains a very large number of species. The metropolis of Platydema 
is, however, in Tropical America, from whence many species are known. About fifteen 
species inhabit America north of Mexico; from our country we now record no less than 
forty-seven. | 
Some of the species range over a very large extent of country, one or two extending 
from Brazil to Mexico; others are altogether as local, and seem confined to a limited 
area. Laporte and Brulleé (6p. cit.) enumerated fifty species, of which some four fifths 
are from the New World, but one only is noticed from Central America. This number 
has since been very largely added to by Chevrolat and Motschoulsky. 
Chevrolat, in view of the great extent of the genus, which will undoubtedly require 
extensive subdivision by future monographers, has proposed to include under the generic 
