142 LLOYDS NATURAL HISTORY. 



The head and thorax are white, the latter marked with three 

 blue-black spots on each side placed longitudinally. The 

 abdomen is blue-black, with white hair between the segments 

 and on the sides, and is terminated by a projecting brown 

 ovipositor in the female. The wings, which are rather thinly 

 scaled, are shining white, the fore-wings are lanceolate and 

 covered with black spots with a blue or green lustre. The 

 hind-wings are whitish, spotted with pale grey, but the 

 spots are much fewer than on the fore wings, and it is 

 only on the hind margin that a row of blue-black spots 

 is visible. The triangular area at the inner margin is pure 

 white. 



The larva feeds in the trunk and branches of a number 

 of trees and shrubs, including the walnut, elm, lime, birch, 

 chestnut, oak, beech, ash, willow, privet, lilac, holly, whitethorn, 

 pear, apple, &c. It is yellow, with raised shining black dots, 

 each having a fine short hair on it. On the head are two black 

 spots and it has a broad shining black plate on the second 

 segment. The last segment is also shining bl.ick. The pupa 

 is reddish-brown with the sides of the body and edges of the 

 wing-cases light brown, while the abdomen is provided with 

 fine booklets. It is formed in a firm cocoon under the bark. 

 The moth flies by night, and appears in August. It is not 

 gL'nerally very common in England, but is most frequently 

 observed in the neighbourhood of London. 



GENUS CIIALCIDICA. 



Chalddica, Hiibner, Verz. bek. Schmelt. p. 197 (1822 ?j. 



This is a long-winged genus allied to Zeuzera, but con- 

 spicuous for the bright colours of the typical species, which 

 inhabit the tro[)ics of the Old World. 



