NATHAL1S. 207 



hind-margin more oblique ; the hind-wings, too, are distinctly 

 narrower. These Butterflies are green, with black borders and 

 black nervures. The females are greenish-white, with the 

 nervures so broadly black as to break up the ground-colour 

 into long rays, thus mimicking the Danaince of the genus Tiru- 

 mala and its allies, which inhabit the same countries. 



SUB-FAMILY IV. CALLIDRYIN.E. 







Antennae short, gradually thickened towards the extremity, 

 rarely with a distinct club. Palpi not extending much beyond 

 the head, and clothed with large depressed scales ; the middle 

 and terminal joints short, the last joint thickened, or slightly 

 pointed. Sub-costal nervure with three- or four-branched. Pre- 

 costal nervure absent, or else but slightly developed. Body 

 generally rather short and stout, and clothed with hair. 



This group includes the Brimstones and Clouded Yellows, 

 which are characteristic of the Northern Hemisphere, though 

 one species of the latter is found in South Africa, and others 

 have reached the extreme south of South America, apparently 

 along the chain of the Andes. Two other groups, represented 

 respectively by Eurema and Catopsilia of Hiibner, abound in 

 most tropical countries, while the remaining genera are con- 

 fined to limited areas, chiefly in the tropics. 



GENUS NATHALIS. 



NathaliS) Boisduval, Spec. Gen. Lepid. i. p. 589 (1856); 

 Doubleday, Gen. Diurn. Lepid. p. 54 (1847); Butler, 

 Cist. Ent. i. pp. 34, 41 (1870); Schatz, Exot. Schmett. ii. 

 p. 69 (1886). 



This is a small and very isolated little genus peculiar to 

 North America and the northern parts of South America. 



