428 STAPHYLINIDA. 
Hab. Panama, Pefia Blanca 3000 to 4000 feet (Champion). 
This is allied structurally to P. serpens of the preceding group, but is readily distin- 
guished by the sculpture of the head, which consists of a rather fine but not dense 
punctuation covering all the surface except a very fine space on the middle. The rather 
slender thorax is conspicuously narrowed behind, and the anterior angles are greatly 
depressed and rounded; the elongate lateral seta is placed at a distance from the 
side margin, and there are only six or seven punctures on each side in addition to the 
discoidal series. The male has apparently no external mark of its sex, and the front 
tarsi are quite slender. ; 
Only three examples, unfortunately in bad preservation, have been met with ; in the 
figure the antenne should have been more slender than they are represented. 
This and the two following species have the basal joint of the hind tarsi much 
shorter than the apical joint, and there can be little doubt they will prove entitled to 
generic isolation, possibly in combination with P. serpens and its allies, though in these 
latter the basal joint of the tarsus is not so much shortened. 
87. Philonthus approximans. 
Gracilis, nigerrimus ; capite subquadrato, crebrius subtiliter punctato ; antennis elongatis ; prothorace elongato, 
angusto, quam elytra multo angustiore, posterius fortiter angustato, serie discoidali circiter 8-punctato ; 
elytris abdomineque crebrius minus subtiliter punctatis. 
Long. 7 millim. 
Hab. Panama, Volcan de Chiriqui 4000 to 6000 feet (Champion). 
This, to judge from a single example in bad preservation, is a species very closely 
allied to P. championi, but of intense black colour, with more slender thorax, and 
rather coarser punctuation. 
88. Philonthus elegans. 
Gracilis, niger ; antennarum basi pedibusque piceis ; capite suboblongo, crebrius subtiliter punctato; antennis 
elongatis ; prothorace elongato, gracili, quam elytra fere duplo angustiore, posterius fortiter angustato, serie 
discoidali irregulariter circiter 8-punctato; elytris crebrius profunde fortiter punctatis ; abdomine crebre 
sat fortiter punctato. 
Long. 7 millim. 
Hab. Panama, Pefia Blanca 3000 to 4000 feet (Champion). 
Though rather closely allied to P. championi, this species will readily be recognized 
by the narrow head and thorax, and the coarser and very definite punctuation of the 
elytra. 
Only one example has been met with. 
BELONUCHUS. 
Belonuchus, Nordmann, Staph. p. 129, t. 2. £. 2; Er. Gen. et Spec. p. 419. 
As already remarked (ante p. 396), this genus is at present systematically distin- 
