424 STAPHYLINIDZ. 
Head small, subquadrate, with the eyes occupying more than half of the length of 
the sides. Thorax straight at the sides, not narrowed behind. Scutellum densely and 
very obsoletely punctate. Tlytra quite dull, very densely punctate, the hind margin 
and suture more rufescent than the other parts. Hind body very densely and finely 
punctate. Legs, including the coxe, clear yellow. 
The male has the front tarsi much dilated, and the last ventral plate marked with a 
moderately large notch behind. 
Somewhat similar to the species of the P. fulvipes group; this insect is readily 
distinguished by the different shape of the head and by the rather larger eyes, and is 
more nearly allied to P. corallipennis, Sharp, which has, however, a different number of 
punctures in the thoracic series. As I can find no other difference of importance, I 
have treated the individuals with red wing-cases as no more than a variety. 
This is one of a little group of species, distinguished by the shape of the head as 
described above, and by the very parallel-sided thorax, the longer of whose lateral 
sete is placed close to the margin. 
74. Philonthus umbratus. 
Angustulus, subparallelus, fusco-niger ; pedibus testaceis, antennarum basi fusco-testacea ; scutello peropaco 
obsoletissime punctato ; elytris dense, abdomine densissime, punctatis ; antennis elongatis. 
Long. 7 miliim. 
Hab. Mexico, Las Vigas (Hége) ; Guatemata, Paso Antonio (Champion); Panama, 
Bugaba, Volcan de Chiriqui 4000 to 6000 feet, Pefia Blanca 3000 to 4000 feet (Champion). 
Very closely allied to P. macilentus, but of rather darker colour, and with the elytra 
less finely punctate. 
75. Philonthus prolixicornis. 
Angustulus, niger ; elytris subsneis, pedibus testaceis, coxis antennarumque basi fuscis; elytris abdomineque 
densissime punctatis ; antennis elongatis. 
Long. 8 millim. 
Hab. GuatEMALa, Torola (Champion). 
This is another species very closely allied to P. macilentus, but readily distinguished 
by the metallic tint of the wing-cases. The antenne are very elongate, the penultimate 
joint being much longer than broad. ‘The scutellum is quite obsoletely punctate. 
The elytra and hind body are very densely punctate; the latter has the terminal segment 
and the bases of the anal styles pale sordid red. 
Only one example has been found; it is a male, with the front tarsi moderately 
dilated, and a shallow notch on the last ventral plate. 
76. Philonthus solitarius. 
Fuscus ; antennarum basi piceo-testacea, pedibus testaceis, tibiis infuscatis, segmentorum ventralium marginibus 
ferrugineis ; capite oblongo-ovato, antennis minus elongatis ; elytris abdomineque dense punctatis. 
Long. 7 millim. 
