IV. 



FAMILY 1. Papilionid^. 



Both sexes with six perfect legs ; inner margin of the hind wings 

 concave ; larvge long, cylindrical, not spiny ; pupae attached by the tail, 

 and a belt of silk round the body. 



Genus 1. Papilio, Z. 



p. Podalirius, L. Scarce Swallow-tail. 



Open places near Woods, — June and July. 



P. Machaon, Z. Swallow-tail. 



Cambridge and Norfolk Fens, — May to July. 



Genus 2. Parnassius, Lair. 



p. Apollo, L. Crimson Ringed. 



Mountains, — June and July. 



FAMILY 2. PlERlD^. 



Characters in common with Papilionida, but the inner margin of 

 the hind wings is not concave. 



