PERRHYBRIS. 159 



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 Heliconius, Lycorea, &c., 

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

 the hind-wings. The type is 



PERRHYBRIS PYRRHA. 

 (Plate LV. Figs. 4$, 5?.) 



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



Cramer, Pap. Exot. i. pi. 63, 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). 

 Pieris iphigenia, Godart, Enc. Meth. ix. p. 156, no. 129 (1819). 

 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 (1819). 



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 



