riASS V. INSECTA. 235 



In this section I shall enumerate the whole of the British species. 



Stirps 1. — Cattrpillar elongate, cylindric: chrysalis elongate, angu- 

 lar : tarsi of the imago with distinct nails. 



Genus 311. PAPILIO. Fahr., Latr., Leach. 



Antenna, at th^jir points, furnished with a conic-ovate or lengthened- 

 ovate, somewhat arcii itc, cluh : palpi very short, pressed close to the 

 face, scarcely reaching the clypeus ; tlie two tirst joints of equal 

 length ; the third minute, and nearly ohsolete : feet in both sexes 

 alike, all being formed for walking, and furnished with distinct but 

 simple claws : anterior wings generally somewhat falcate ; hinder 

 ones often tailed ; the internal margin excised or folded to admit of 

 free play to the abdomen. 



The caterpillar is tentaculated, fleshy and furcate. The chrysalis 

 angulated, with two processes before ; it fastens itself by a trans- 

 verse thread. 



The species of this genus, which constitutes the most beautiful 

 part of the creation, arc found chiefly in the warmer regions, very 

 few occurring in the more temperate parts of the world. Their 

 flight is extremely rajjid. 



Sp. 1. Pap. Machaoii. Dlack and yellow^; hinder wings tailed; edges 

 of the wings black, with yellow crescents ; the tips of the hinder 

 ones with a red spot at their inferior tips. {PL 5. jig. 1.) 



Papilio Machaon. Ijnn., Bahr., llazcorth. 



Inhabits Europe ; the larva feeds on vnnbelliferous plants. 



In England it is called the Swallow-tailed butterfly; it is very lo- 

 cal, but occurs near Bristol, Beverley in Yorkshire, and has been 

 taken plentifully in Hampshire near the New Forest. It is the 

 most superb of all the British species of this family. The cater- 

 pillar is green, banded with black, marked by a row of red spots. 

 It changes into the chrysalis state in July ; and the fly is found in 

 August. There are two broods ; the first appears in May, having 

 lain in the pupa state all the winter. 



Papilio Podalirius of Linne, which belongs to this genus, has been in- 

 troduced into the British Fauna on very dubious authority. But 

 Mr. Ilaworth is yet in hopes of receiving indigenous specimens from 

 Yorkshire. 



Genus 312. GONEPTERYX. Leach. Colias. Fahr., Latr. Pi- 



ERis. Schrank. 

 Antenna short, gradirally thickening into an obconic head : palpi short, 

 much compressed ; the last joint very ^hoYt : feet alike in both sexes, 

 all with a bifid or unidentate nail : wings angulated, large, the hinder 

 ones grooved to receive the abdomen : chrysalis angulated with a 

 j-hread round its middle. 



