' CI ASS V. INSECTA. 235 



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



Stirps 1. — Caterpillar elongate, cyliudric: chrysalis elongate, angu- 

 lar: tarsi of t/ic imago with distinct nails. 



Genus 311. PAPILIO. Fabr., Latr., Leach. 



Antenna, at their points, furnished with a conic-ovate or lengthened- 

 ovate, somewhat arcuate, club : palpi very short, pressed close to the 

 face, scarcely reaching the clypeus ; the two first joints of equal 

 length; the third minute, and nearly obsolete: /tc^f in both sexes 

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

 simple claws: aHtov'w wings generally somewhat falcate; hinder 

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

 I'ree 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, are found chietly in the warmer regions, very 

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

 tlight is extremely rajiid. 



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

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

 ones with a red spot at their inferior tips. (P/. 5. fig. 1.) 



Papilio Machaon. Linn., Bal>r., llaworth. 



Inhabits Europe ; the larva feeds on umljclliferous plants. 



In England it is called the Swallow-tailed buttertly; 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 super!) of all the British species of this family. The cater* 

 pillar is green, banded with l)lack, 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, iiavin^- 

 lain in the pupa state all the winter. 



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

 troduced into the British Fauna on very dubious authority. But 

 31 r. Haworth is yet in hopes of receiving indigenous specimens from 

 Yorkshire, 



Genus 312. GONEPTERYX. T^ach. Colias. Fair., Latr. Pi- 

 ERis. Schrank. 

 An/ennec short, gradually thickening into an obconic head : palpi short, 

 much compressed; the last joint very short :fccf. alike in both sexes, 

 all with a bifid or unidentate nail : rciii^s angulated, large, the hinder 

 ones grooved to receive tlie abdomen : chri/salts angulated with a 

 thread round its middle. 



