580 STAPHYLINIDA. 
Hab. Panama, Bugaba (Champion). 
This species is distinguished from E. crassidens chiefly by being rather less elongate, 
more pallid in colour, with a shorter head, and the punctuation of the latter and the 
thorax, though very fine, not so extremely obsolete. 
The unique example is apparently a female. 
3. Hustilicus mexicanus. 
Latior, niger, opacus, antennis pedibusque fuscis ; capite prothoraceque omnino opacis, fere invisibiliter punc- 
tulatis, illo suborbiculare ; elytris omnino densissime subtilissimeque subscabroso-punctatis. 
Long. 83 millim. 
Hab. Mexico, Misantla (Hoge). 
Antenne short, not reaching to the base of the thorax; penultimate joint scarcely so 
long as broad. Head broad. Thorax with a very dull surface, without any distinct 
sculpture. Elytra covered with a very dense, fine, granular punctuation. Male with a 
broad deep emargination of the last ventral plate, and a very slight emargination of 
that preceding. Unique. 
Readily distinguished from E. crassidens by the broader form, very dark colour, and 
shorter antenne. 
4, Kustilicus gracilis. 
Gracilis, fusco-niger, opacus, pedibus fusco-rufis; antennis fuscis, apicem versus rufis ; capite prothoraceque opacis, 
fere invisibiliter punctatis, hoc subovale ; elytris omnino densissime subtilissimeque subscabroso-punctatis. 
Long. 7 millim. 
Hab. GuateMaALA, Tactic 5000 feet (Champion). 
Very closely allied to EL. crassidens, but of rather darker colour, more slender form, 
and with the punctuation of the head and thorax not quite so obsolete. 
The unique example is a female. 
TROCHODERUS. 
Characteres fere ut in genere Hustilico, sed labrum medio multidenticulatum, mandibuleque tenuiores. 
So far as I can detect, this genus agrees thoroughly with Hustzlicus, except in the 
structure of the labrum and mandibles. The labrum is peculiar; it is large and 
prominent, though not quite to such an extent as it is in Hustilicus; and instead of 
having two large definite teeth in the middle, separated by a slight excision, it has a 
number of smaller less definite teeth; on each side of the middle are two teeth placed 
quite close together, and between them, exactly on the middle, a less prominent denticle ; 
nearer to the side there is a still smaller denticle, separated by a considerable space 
from the two contiguous teeth. 
