APRIL. 95 



rather smaller; the wings are obscure, with yellowish 

 nerves. The dwellings of these Ants,, which are called Red, 

 Hill, or Horse Ants, are composed of straws, wood, and 

 earth, heaped into a cone-shape, and are found in woods ; 

 the number of individuals of which a nest is composed is 

 very great ; when disturbed the ants come out in immense 

 numbers, looking very formidable, and biting severely. 

 Their habitation is formed with much art, and differs from 

 that of all other species, in having a great many entrances, 

 which are all closed at sunset, when the little inhabitants 

 shut themselves in for the night. 



FORMICA NIGRA. Black Ant. In this species the insects 

 are about two lines long, of a blackish-brown colour, with 

 the mandibles and part of the antennae paler ; they dig small 

 galleries on the sides of roads, fields, and gardens. 



LEPCDOPTERA. PAPILIONID^E. 

 PONTIA. 



Generic Distinctions. Antenna long, slender, and terminating 

 in an abrupt club \ palpi clothed with scales ; anterior wings 

 nearly three-cornered ; posterior wings rounded, and not varie- 

 gated beneath ; legs alike in both sexes ; chrysalis terminated in 

 a beak, and attached by the tail. 



