(1) _Formica fusca_, Linn.--A rather large ant (3-1/2 to 4-1/2 lines long), of a blackish ash colour, with a satiny sheen on the upper half of the abdomen. Smells of formic acid when crushed. Lives upon sweet secretions and animal matter, and occasionally carries a very few seeds into its nest, which is made in the ground. (Mentone.) (2) _F. emarginata_, Latr.--Of medium size (2-1/2 lines), brownish, with yellow thorax. Has a strong smell of honey when crushed. Lives principally upon sweet secretions, but occasionally carries a very few seeds also. Nest in the ground. (Mentone.) (3) _F. (Camponotus) cruentata_, Lat.--Large (5 to 6 lines), dusky brown, with orange red on legs and abdomen. Strong smell of formic acid. Lives on sweet secretions and animal matter, and has never been seen by me carrying seeds. Nest in the ground. (Mentone and Cannes.) (4) _F. (Camponotus) marginata_, Latr.--Large (4 to 5-1/2 lines), black. Has no perceptible smell even when crushed. Lives principally on sweet secretions, and does not bring in seeds to its nest, which is made in the ground. I have seen this ant at Cannes ascending the cork oaks in search of certain cocci which resemble black and shining berries rather larger than a pea, and which exude sweet secretions. (Mentone and Cannes.) (5) _Formica cursor_, Fonscol.--A rather large but slender ant (3 to 4 lines long), nearly black, with a faint bronzy hue, legs very long. Smell not noted. Runs very swiftly, and is hard to catch; feeds on sweet secretions, and does not carry seeds. Nest in ground. (Cannes.) (6) _F._ (species undetermined).--A large ant (5 to 6-1/2 lines), black brown with yellow thorax and legs. In shape resembles _F. marginata_. Strong smell of formic acid. Habits not observed. Nest found under a stone in a pine wood. (Cannes.) (7) _F._ (species undetermined).--A rather large ant (3 to 4-1/2 lines), resembling _F. fusca_, but having the thorax yellow. Strong smell of formic acid. Feeds on sweet secretions, and does not carry seeds. Nest in ground. (Cannes.) (8) _Formica (Tapinoma) erratica_, Latr.--Rather small (2 lines), nearly black. Has a strong and most disagreeable smell, something like rancid oil, which is emitted if the nest is disturbed or the insect crushed. Lives upon sweet secretions and animal matter, but rarely if ever carries seeds, and pays no attention to them if placed in its path. It nests in the ground, and forms superficial covered ways, roofed in with a thin crust of earth and vegetable fibres cemented together. (Mentone, Cannes.) _Tribe Myrmicineæ_. Petiole two jointed, furnished with two nodes (protuberances).