PERRHYBRIS. 1 59 



A Tropical American genus, with moderately long wings, and 

 the sub-costal nervure three-branched (or, rarely, four-branched). 

 Sexes dissimilar, the males white above, with black borders, 

 and the females resembling species of HeUconius^ Lycorea, &c., 

 as do also the males to some extent, on the under surface of 

 tlie hind-wings. The type is 



PERRHYBRIS PYRRIIA, 

 {Plate LV. Figs. 4J, 5?.) 



Fapilio pyrrha^ Fabricius, Syst. Ent, p. 464, no. 95 (1775); 



Cramer, Pap. Exot. i. pi. ^t^^ figs. A, B (1775). 

 Papilio iphigenia, Schulzens, Naturforscher, ix. p. 108, pi. 2 



(1776); Fabricius, Gen. Ins. p. 256 {1777); Donovan, 



Nat. Rep. iii. pi. 81 (1825). 

 Pieris pyrrha^ Godart, Enc. Meth. ix. p. 156, no. 129 (1819) ; 



Boisd. Spec. Gen. Lepid, i. p. 440 (1836). 



Fieris iphigenia^ Godart, Enc. Meth. ix. p. 156, no. 129 (18 19). 



Perrhybris eieidias^ Hiibner, Samml. Exot. Schmett. ii. (1824), 



Perrhybris pyrrha, Staudinger, Exot. Schmett. i. p. 36, pi. 20 



(1884). 



Female. 



Papilio Pamela., Cramer, Pap. Exot. iv. pi. 319, fig. A (1780). 

 Pieris Pamela^ Godart, Enc. Meth, ix. p. 156, no. 131 (18 19). 

 This is a common Tropical American species, measuring 

 about two inches and a half in expanse. In the male the 

 wings are white above, with the tip of the fore-wings trian- 

 gularly black to below the middle of the hind-margin, above 

 which it is deeply indented by the white ground-colour. The 

 hind-wings have a rather narrow black band on their lower half. 

 The fore-wings are coloured beneath as above ; the hind-wings 

 are white, tinted with pale yellowish towards the base, and with 

 three black bands running from the base and inner margin far 



