PLATYDEMA.—LIODEMA. 205 
reque infra rubris; capite antice rotunde impresso, antennis elongatis, moniliformibus ; 
prothorace punctulato, basi bisinuato, supra scutellum modice rotundato ; scutello 
triangulari, acuto; elytris nitidis, regulariter minuteque punctato-striatis, disco con- 
vexis, epipleuris nigris, supra marginatis. Long. 2 millim., lat. 2 millim— Yucatan, 
a D. L. Pilate amice offertum.” 
LIODEMA. 
Liodema, Horn, Rev. Ten. of America north of Mexico, p. 385; F. Bates, Ent. Monthly Mag. 
ix. p. 235. 
Dr. Horn described this genus upon a single species from the United States; since 
then six others, from Tropical South America, have been added to it by Mr. F. Bates, 
and one or two from our country (identical with these) have been described by Chevro- 
lat; Platydema 4-notata, Lap. & Brullé, also belongs to it. 
The metropolis of Ziodema is undoubtedly in Tropical America: we have to record 
seven species from our country; others doubtless still remain to be discovered in 
Tropical South America. 
Some of the species range over a large extent of country, from Mexico to Brazil; 
one or two are common insects in the forest-region of Central America. 
This genus is readily identified by the remarkable structure of the mesosternum, 
and by the subserrate antenne ; the markings of the thorax and elytra vary considerably 
in several species. These insects are of the same habits as Platydema, and found 
in fungoid growths on decaying trees. 
1. Liodema leve. 
Platydema levis, Hald. Journ. Acad. Phil. ser. 2, 1. p. 101 (1848) °. 
Liodema leve, Horn, Rev. Ten. of Am. north of Mexico, p. 385 *, 
Hab. Norra America, North Carolina!?.—Mexico, Jalapa (Hége); GuaTEMaLa, 
Capetillo (Champion). 
Examples from Mexico and Guatemala agree with the description of this species. 
I have not, however, seen examples from the United States. 
2, Luiodema kirschi. (Tab. IX. fig. 13.) 
Liodema kirschi, F. Bates, Ent. Monthly Mag. ix. p. 235°. 
? Liodema fulvum, F. Bates, loc. cit. p. 236°. 
Scaphidema tergocinctum, Chevr. Petites Nouv. Ent. ii. pp. 178, 243, nota °. 
Liodema inscriptum, Chevr. loc. cit. p. 222 *. 
? Platydema 4-notata, Lap. & Brullé, Ann. Sciences Nat. xxiii. p. 380°. 
Hab. Mexico, Cordova 4, Vera Cruz (Sallé), Jalapa, Esperanza (Hoge); GUATEMALA 
(Sallé *), Capetillo, Aceytuno, Pantaleon, Cerro Zunil, Senahu (Champion); Nicaraeva, 
