184 HETEROMERA. 
Black ; elytra with two reddish testaceous ulated 
transverse bands; antennz black, the two basal 
joints ‘and the extreme apexred. - - - + : biplagiatum. 
Similar ; thorax red at the sides ; antenne red. . maculipenne. 
Thorax black, the sides testaceous ; elytra testaceous, 
with black spots (each elytron usually with a broad 
_ transverse patch behind the middle, a large oblique 
apical spot, and two small spots at the base) . . dimidiatum. 
Head black ; thorax testaceous, with two small spots, 
and the base (partly), black; elytra testaceous, 
part of the base, the suture, a broad transverse 
mark (often divided) about the middle, and one 
or two small spots, black . . . . . elegans. 
Reddish testaceous ; thorax with three dark streak ; ; 
each elytron with two spots near the base, and 
several longitudinal streaks in the apical half, black lucens. 
Reddish testaceous ; thorax with a broad black patch ; 
each elytron with three very large spots, and the 
scutellar region also, black. . . . . . ~ « cordovense. 
Red,immaculate . . . 2. ) + ee ee unicolor. 
Form broad ovate. 
Reddish testaceous ; thorax with six small black spots ; ; 
each elytron with three large and two small black 
spots... ee ee ee ee ee ee ORUSIUM. 
1. Platydema excavatum. (Tab. VIII. fig. 11, 3.) 
Diaperis excavata, Say, Journ. Acad. Phil. iii. p. 267 (1824) *; Horn, Rev. Ten. of Am. North of 
Mexico, p. 381 ; Leconte, Complete Writings of Thomas Say, ii. p. 157. 
Platydema tuberculata, Lap. & Brullé, Ann. Sciences Nat. xxii. p. 852° (1831). 
Platydema tuberculatum, Chevr. Petites Nouv. Ent. ii. p. 210 (2). 
Platydema fraternum, Chevy. loc. cit. p. 210°. 
Platydema parvulum, Casey, Contrib. to the Descript. and System. Col. of North America, part 1, 
p- 504; Horn, Ent. Americana, i. p. 111 (1885). 
Hab. Nort America, United States !4.—Mexico (coll. F. Bates), Vera Cruz, Cordova 
(Sallé), Jalapa, Esperanza, Cerro de Plumas (Hoge); British Honpuras, Belize, R. 
Sarstoon (Blancaneauz); Guatemata, Zapote, Capetillo, Purula (Champion) ; Nica- 
ragua, Chontales (Janson); Panama, Volcan de Chiriqui (Champion).—CotomBia (coll. F. 
Bates).— ANTILLES, Cuba *, Santo Domingo ®. 
A wide ranging species, common throughout our region, and extending southwards 
to Colombia; it is found abundantly, according to Dr. Horn, in the United States, and 
is also recorded from the Antilles. Most of the specimens from Guatemala southwards | 
are considerably broader and larger than those from more northern localities, those 
from British Honduras are, however, the size of Mexican examples. 
