578 . STAPHYLINIDZ. 
Thorax rather smaller than the head, about as long as broad, a little curvate at the 
sides and distinctly narrowed behind ; the punctuation dense, excessively minute, indeed 
almost entirely obsolete, the pubescence dense; colour dull red. lytra slightly longer 
than the thorax, finely and densely punctured, with some indistinct larger punctures, 
which are not serial in their arrangement. The male is distinguished only by the hind 
margin of the last ventral plate being less rounded than in the female, and scarcely 
perceptibly emarginate in the middle. Four examples. 
2. Deroderus punctipennis. 
Fuscus, capite prothoraceque nigris, pedibus fusco-rufis; densissime punctatus, elytris punctis majoribus 
impressis distinctis. 
Long. 7 millim. 
Hab. GuatemaLa, Cerro Zunil (Champion). 
Antenne short and stout, the third joint a little longer than the second. Head subcir- 
cular, excessively densely, evenly and finely punctured, quite dull. Thorax subquadrate, 
a little narrower than the head and elytra, distinctly narrowed behind, its greatest length 
rather exceeding the breadth, punctate like the head, with an indistinct canaliculate 
carina at the base in the middle. Elytra elongate, longer than the thorax, densely and 
finely punctate, not quite so dull as the head and thorax, with numerous larger punctures 
subserially arranged. The unique example is probably a female. 
3. Deroderus latipes. 
Fusco-niger, subdepressus, densissime subtilissimeque punctatus, peropacus ; antennis pedibusque sordide rufis, 
his crassiusculis. 
Long. 53 millim. 
Hab. GuateMa.a, Las Mercedes 3000 feet (Champion). 
Antenne short and stout, the third joint scarcely so long as the second, the fourth to 
the tenth differing little from one another, the fourth slightly longer than broad, the tenth 
not so long as broad Head subcircular, flat, excessively finely and densely punctulate. 
Thorax suboblong, slightly narrowed behind, rather longer than broad, punctate like 
the head, with a fine channel in the middle behind. Elytra elongate, flat ; very densely 
and finely punctate, in a manner almost similar to the head and thorax; with very faint 
traces of larger punctures. Legs short and stout. The unique example is probably a 
female. 
4. Deroderus difficilis. (Tab. XV. fig. 3.) 
Latiusculus, niger, elytris sordide rufis, pedibus fusco-rufis, antennis testaceis; capite quadrato-orbiculato, 
densissime fortiterque punctato; prothorace fortiter punctato, medio area lata levigata. 
Long. 53-6 millim, 
Hab. Mexico, Las Vigas (Flohr). 
Third joint of the antenna slender, a little longer than the second. Head broad, exces- 
