398 STAPHYLINIDA. 
and in the former sex the apical ventral plate bears a moderately deep angular excision. 
Four examples are before me; the two males from Jalapa display the peculiarity, unusual 
in this genus, of being much smaller than the females; as the sexes have not occurred 
in the same locality, it is possible the females may prove to be those of another species. 
The figure is taken from a female found at Oaxaca. 
4. Philonthus nigerrimus. 
Philonthus nigerrimus, Er. Gen. et Spec. Staph. p. 484". 
Hab. Mexico 1, Parada, Puebla, Toluca (Sad/é), Las Vigas (Hoge). 
Although very closely allied to P. furvus, and especially similar to the var. P. flohri, 
this is, I think, a distinct species. It is apparently confined to Mexico, and is replaced 
in California by another very similar insect, P. alutaceus, Fauvel in litt. 
5. Philonthus furvus. 
Philonthus furvus, Nordm. Staph. p. 88°; Er. Gen. et Spec. Staph. p. 434.7. 
Hab. Norta America, from Labrador.—Mexico!?, Puebla, Parada, Guanajuato, 
Capulalpam (Sal/é), Las Vigas, Oaxaca, Mirador (Hoge); GuatemaLa, San Ger6énimo, 
Guatemala city, Panajachel 5000 feet, Quezaltenango 7800 feet, Totonicapam 8500 to 
10,500 feet (Champion); Costa Rica, Irazu 6000 to 7000 feet (Rogers). 
Var. Elytrorum lateribus concoloribus. 
Philonthus flohri, Sharp, Trans. Ent. Soc. Lond. 1876, p. 429°. 
Hab. Mexico ® (Flohr), Chiapas (Saldé). 
This is a very variable species. In Mexico the common form has black elytra with 
the inflexed margin broadly yellow, the under surface of the body furnished with a 
grey pubescence, which also covers the raised lateral margins of the upper surface. 
In the var. P. flohri no trace exists of the yellow stripe, and the pubescence is darker 
and the punctuation finer; this variety apparently is not found in company with the 
common form, but I have seen a few specimens which connect it therewith. In 
the specimens from Guatemala the elytra are eneous and never have a yellow side- 
margin; but some of the individuals found at a great elevation at Totonicapam 
connect this variety with those (P. flohri, var.) of the Mexican form. Costa Rican 
individuals resemble those from Guatemala, but they are smaller, with shorter 
articulations to the antenne, and a finer punctuation of the hind body. 
6. Philonthus sallzi. (Tab. X. fig. 5.) 
Nigerrimus, nitidus ; prothorace lateribus posterius fortiter sinuatis; elytris abdomineque parce punctatis ; 
antennis apicem versus parum incrassatis, articulis 7°-10™ leviter transversis. 
Long. 14-18 millim. 
Hab, Mexico, La Parada (Sal/é). 
