294 LLOYDS NATURAL HISTORY. 



hind wings instead of the large white spot. Many forms closely 

 allied to P. polytcs^ differing chiefly in the extent of the mark- 

 ings, are found in the East. Some are tailed, and others tail- 

 less ; they measure rather more than three inches across the 

 wings. 



The larva of F. polytes is green above, with cream-coloured 

 bands and markings on several segments ; the anterior seg- 

 ments are inflated. Beneath, it is cream-coloured. It feeds 

 on different species of Citrus. The pupa is green or brown. 



[lx. b.] C/ianis, Moore. This genus, the type of which is 

 C. helenus (Linn.), much resembles the last in shape, and 

 is also tailed, but the species are considerably larger, often 

 measuring four or five inches across the wings, and are dif- 

 ferently coloured. They inhabit various parts of the Indo- and 

 Austro-Malayan Regions, and are black above, with a very large 

 creamy-white spot on the hind-wings, which is narrow above, 

 and extends from the costa over the upper and outer half of the 

 wings, but without reaching the hind-margin. On the under 

 side there are one or two black spots, more or less completely 

 bordered with red towards the anal angle, with some blue 

 lunules between these and the white patch ; these markings are 

 sometimes partially reproduced above, while in other species 

 they are very much reduced. Sometimes the red markings 

 are replaced by yellow. The larva of C. helenus is dark green 

 above, and flesh-coloured below ; the hinder part of the thora- 

 cic segments is much thickened. In front of the inflation is a 

 flesh-coloured spot, with two black pupils on each side of the 

 upper surface ; and behind the inflation is a flesh-coloured 

 band. Beyond the middle is a broad oblique pinkish-white 

 band, and another transverse band of the same colour between 

 this and the end of the body. The food-plant is probably 

 Citrus, but has not been recorded. The pupa is brown, much 

 curved, with a bifid head. 



