180 NATURAL HISTORY. 



die than at the extremities, is tuberculated. The chrys- 

 alis hangs horizontally or perpendicularly ; in the first 

 case, by a girdle round the body, in the latter, suspended 

 by a thread. The largest and handsomest are natives o/ 

 the torrid zone. 



The Swallow- Tailed Butterfly (aeronaut machaon), 

 plate 23, fig. 6. Yellow, striped, and dotted with black ; 

 blue spots on the under wings ; found everywhere in 

 Europe. Caterpillar, two inches and a half long, is 

 smooth blue-green, with markings of black ; lives on 

 celery, parsley, fennel, etc., and has two flesh-colored 

 filaments on the back of the neck, which can be extended 

 like feelers at will. This butterfly may be often seen 

 resting on damp earth, from which it extracts water. 

 The pupa is yellow, and hangs horizontally suspended by 

 a girdle, from which it is sometimes termed the girdle 

 worm. Resembling the Machaon is 



The Surinam Page (seronautaLeilus), plate 24, fig. 

 7, except that it is green where the former is yellow ; 

 the projecting points of the hinder wings are longer ; the 

 green caterpillar lives on the shaddock trees, and is trans- 

 formed into a white and black spotted pupa, remains four- 

 teen days, and then comes forth a butterfly. 



The Sailor or Papilio Proper (seronauta podalyrius) 

 is sulphur color, with longitudinal black stripes and long 

 spurs on the hinder wings. The larva is green, dotted 

 with red, moves slowly, stretches forth two yellow horns 

 which emit a disagreeable odor ; is found on the plum 

 and black thorn. The pupa is grayish-yellow. The 

 handsomest butterflies belonging to this species come 

 from the East Indies and South America ; of these per- 

 haps, the first is 



The AcMUcs (aeronauta achilles) which has dark brown 



