CROESUS SEPTENTRIONALIS. 39 



tarsi (except at the apex which is black) and a little more than the half 

 of the two posterior tibiae, white; apex of anterior femora brown 

 beneath, anterior tibiae and tarsi at the apex with a dilute reddish tinge ; 

 base of intermediate tirsi reddish ; the posterior calcaria are of the 

 same colour. The abdomen has the basal two and the apical two or 

 three segments black, the rest reddish-brown. The cerci are mode- 

 rately long, black. 



The has the femora red, the apex of posterior black above ; the 

 mouth and tegulse are reddish. 



Length 5^ 6 lines. 



Easily recognised by the clouded apex of the wings 

 and the black femora. 



Larva : the head is black, shining, the mouth 

 greyish. The body is greenish or bluish-green, the 

 second and anal segments orange-yellow. A little 

 above the spiracles is an irregular black spot, below 

 them are three black spots, one large, two small; over 

 the legs are three or four square black spots, with 

 some black lines. On the second segment below the 

 spiracle is a narrow irregular black mark. On the 

 top of the anal segment is a large triangular black 

 spot, ending in the black cerci. The legs are greyish, 

 with brown claws, and sometimes there is a little 

 brown on the tarsi; the claspers are yellowish. On 

 the belly, between each pair of legs, is a triangular 

 black spot, and before these, in the direction of the 

 head, is a small black line. There is a large yellowish 

 gland on the fifth, seventh, eighth and ninth, and a 

 smaller one on the fourth and tenth. 



When young it is whitish-green with a brown head. 

 At the second moult it is pale green, with the anal 

 segment a little yellowish, and there are two black 

 stripes on the sides. 



The eggs are laid in the veins of the leaf. The 

 larvae feed (from four to eight on a single leaf) in a 

 row on the edge of a leaf, holding on with the fore- 

 legs, the rest of the body is flung out in a curve into 

 the air, the anus turned down or up, and often nearly 

 touching the head. "When anything approaches, the 

 body is thrown violently about, and the ventral glands 

 are actively protruded. They feed quite exposed, and 



