44. HETEROMERA. 
strongly crenulate near the base, closely tuberculate above, the tubercles eblaretae sea sta se 
separated by fine yellowish-white veins or lines, the posterior angles and re e i. oo saree 
with yellowish white; elytra short and very convex, rounded at the sides, ¢ osely men ius 
black tubercles arranged thus—a sutural row regular small, a row smaller irregu ar, ne rows very 
large, a row a little smaller, and a marginal row about same size, between these irregular rows are 
numerous other small tubercles of the size of those of the sutural row, the spaces between the tubercles 
filled up with a fine network of yellowish-white colour, shoulders not very prominent, apex quadrituber- 
culate. Beneath black, margins of thorax, meso- and metasternum, and second and third ventral segments 
marked with yellowish white, flanks of prothorax and elytra closely and coarsely tuberculate, the rest 
(ventral segments excepted) more or less rough or tuberculate, ventral callosity deeply emarginate in 
front. 
Length 18-27 millim. 
Hab. Mexico, Parada, Las Peras (Sallé), Oaxaca (coll. F. Bates). 
Closely allied to, and probably only a form of, the preceding species (Z. nervosus, 
Sol.); shorter and more convex, the thorax and elytra more closely tuberculate, and 
the tubercles, though more numerous, more distinct one from another. This species 
bears the name of compactus, Sallé, in the Sallé collection, the name I have adopted. 
NOSODERMA. 
Nosoderma, Solier, Ann. Soc, Ent. Fr. x. p. 31, t. 2. f. 1-3 (1841). 
Homaloderes, Sol. loc. cit. iti. p. 502, nota. 
This genus is probably confined to the Neotropical Region, ranging from Mexico to 
Brazil, and occurring also in the West Indies; it is well represented in Central 
America, whence three or four species have been described; one species is found 
in Brazil, one in Colombia, and one in Cuba; a number of additional species (about 
half of which are known in collections) are described here. Nosoderma, like Zopherus, 
has its head quarters in Central America, though not occurring north of Mexico, where 
it is replaced by the closely allied genera Phellopsis, Noserus, and Phiwodes. Allied 
forms, probably generically distinct, are found in Japan, Siberia, and East Africa; and 
also (Zopherosis) in New South Wales. ‘These insects are difficult to describe in a 
satisfactory manner; like certain Aside the depressions of the upper surface are often 
filled up with earthy matter, thus disguising the sculpture, and good differential 
external sexual characters are apparently wanting. 
The different species are found under loose bark in the forests, usually at high 
elevations, and often in very dark damp places; also upon fungoid growths attached 
to the bark of old stumps or dead standing trees, upon which they remain apparently 
immovable, and so much do they assimilate the surface upon which they are resting 
that it is often very difficult to distinguish them. 
1. Nosoderma quale. (Tab. II. fig. 14.) 
Elongate, depressed, dull black. Head almost smooth; prothorax much longer than broad, widest about the 
middle, sides rounded and very slightly narrowed at base and in front, base truncate, and as wide as the 
