PLATYDEMA. 193 
Two examples. In this species the entire upper surface is of a dull ferruginous 
colour, without spots or markings. P. immaculatum is perhaps nearest allied to 
F. sexnotatum, but is shorter and more ovate in form, the elytra without spots, &c. , 
19. Platydema diophthalmum. (Tab. VIII. fig. 16.) 
Platydema diophthaima, Lap. & Brullé, Ann. Sciences Nat. xxiii. p. 383’. 
Platydema luna, Chevr. Petites Nouv. Ent. ii. p. 186°. 
Hab. Mexico? (coll. F. Bates), Ventanas (Forrer), Cordova (Sallé), Jalapa (Hoge); 
British Honpuras, Belize (coll. F. Bates, Blancaneaux), R. Sarstoon (Blancaneauz) ; 
GuatEMALA, El Reposo, Capetillo, Zapote, San Gerdnimo, San Juan in Vera Paz 
(Champion); Nicaragua, Chontales (Belt, Janson); Panama, Volcan de Chiriqui, 
Bugaba (Champion).—ANTILLES, Cuba 1 (coll. F. Bates). 
A common species throughout the forest-region of Central America. I fail to 
detect any difference between P. lwna, the type of which is before me, and P. dioph- 
thalmum. A large dull black species, each elytron with a large rounded transverse red 
spot near the base. I met with P. diophthalmum in great abundance about fungoid 
growth on fallen trees in the low forest-region west of Bugaba, and also not uncommonly 
in various parts of Guatemala. | 
An example from R. Sarstoon is figured. 
20. Platydema bimaculatum. 
Platydema bina, Deyr. in litt. 
Size and form of P. diophthalmum, and differing as follows:—the head smoother and much more finely 
punctured; the prothorax widest a little before the base, the sides more rounded behind, the hind angles 
in consequence more obtuse, the surface almost smooth ; the elytra more finely and shallowly punctate- 
striate, the red spot placed at the middle (not near the base as in P. diophthalmum) ; the penultimate 
joints of the antenne less transverse ; the rest as in P. diophthalmum. 
Length 6-8 millim. 
Hab. Mexico, Cordova, Tuxtla, Toxpam (Sallé), Jalapa (Hoge); British Honpvuras, 
Belize (Blancaneaur) ; GUATEMALA, San Juan in Vera Paz (Champion); NicaRraeva, 
Chontales (Belt, coll. F. Bates); Panama, Volcan de Chiriqui (Champion).—GUuIANA, 
Cayenne. 
Generally distributed throughout our region, but not quite so common as P. dioph- 
thalmum, and often captured in company with that species, from which it may be 
known by the red spot.on each elytron being placed further back and at the middle of 
each, as well as by other characters. 
21. Platydema fasciatum. 
Mycetophagus fasciatus, Fabr. Syst. Eleuth. ii. p. 367. _ 
Platydema fasciatum, Lap. & Brullé, Aun. Sciences Nat. xxiii. p. 3827. 
Diaperis fasciata, Dej. Cat. 3rd edit. p. 68. | 
BIOL. CENTR.-AMER., Coleopt., Vol. IV. Pt. 1, July 1886. 20C 
