404 STAPHYLINIDA, 
19. Philonthus chiriquensis. . 
Niger; capite prothoraceque vix subeneis, elytris cyaneis fortiter minus dense punctatis, abdomine versicolore 
parce punctato ; antennis extrorsum crassioribus. 
Long. 16 millim. 
Hab. Panama, Volcan de Chiriqui between 4000 and 6000 feet (Champion). 
This is the largest insect of this group of species, and has the head and thorax 
comparatively less slender than any of the others. The penultimate joint of the 
antenne is not quite so long as broad. The thorax is a good deal narrowed in front, 
and the impressed punctures on it are large. The punctures on the elytra are rather 
coarse, very definite, not close. The hind body is very fulgid, and the impressed punc- 
tures on it are scanty and coarse. 
A single female only has been found. 
20. Philonthus boucardi. 
Philonthus boucardi, Solsky, Hor. Soc. Ent. Ross. v. p. 127°. 
Hab. Mexico 1. 
This dubious species was described apparently from a single female example ; Solsky, 
in his enumeration of the rather numerous Mexican Philonthi known to him, does not 
include P. fibularius, Er. ; and I think from this and his description that P. boucardi 
will probably prove a variety of P. fibularius with the elytra tinctured with violet 
colour. 
21. Philonthus atriceps. (Tab. X. fig. 12). 
Fere parallelus, subdepressus, brunneo-testaceus ; capite nigro, abdominis segmento ultimo nigricante ; antennis 
tenuibus, articulis medialibus fuscescentibus ; prothorace subquadrato, serie discoidali subtiliter quadri- 
punctata ; elytris abdomineque dense, hoc fortius, illis subtilius, punctatis. 
Long. 10 millim. 
Hab. Mexico, Jalapa, Las Vigas (Flohr). 
This is a very distinct readily recognized species, having very slender antenne, not 
thickened outwardly, so that the penultimate joint is much longer than broad ; each of 
joints 4-7 has its outward portion more or less infuscate, the rest being, like the palpi 
and labrum, red or reddish yellow. The subquadrate head is nearly as broad as the 
thorax, but in the female is somewhat narrower; it is black and shining, and very little 
punctate. ‘The thorax is scarcely narrowed in front, and is nearly as long as broad ; it 
is very shining, and its punctures are remarkably small. The scutellum is concolorous 
with the elytra ; these are dull and very closely and regularly punctate. The legs and 
tarsi are slender, the tibie- only very scantily spinose ; the basal joint of the hind 
tarsus is longer than the terminal one; the front tarsus of the male is only slightly 
dilated and its very elongate terminal joint is equal in length to the other four together. 
