LÉPIDOPTÉROLOGIE COMPAREE 377 



2nd INSTAR. 



Length at end, 7 mm. to 7,5 mm. 



Again, there is but little différence between thc larvus. Harrisoni 

 appears a little deader black m the gromid colour although this 

 appearance may produced by the greater distinctness of the lon- 

 gitudinal Imes, more especially visible after the yellow transverse 

 bars, and on the last abdominal segments. 



In harrisoni the two yellow spots before the anal plate are 

 nearly absent, as the mmute wart bearing one of the primary 

 tubercles is larger, and obscures the yellow to a greater extent. 



The spiracular stripe, although much the same in gênerai appea- 

 rance as in denhami, is slightly less confused. 



3rd INSTAR. 



Length at end I3-I4mm. 



Breadth 1,45 mm. 



The larvée are now very like each other and the différences 

 are only in very small détails. In the marbling of the hcad, the 

 two colours are much more equal in extent in harrisoni. 



The yellow bars, which even in denhami are tending to disap- 

 pear, are generally more pronounced ni that form than in this, 

 though both may be without them. The collar in denhami is 

 fairly continuous, but, in harrisoni, it is composed of three dots 

 at the end of the longitudinal stripes on each side. 



In both, the yellow spots are developed before the anal plate 

 but they are generally larger in denhami. 



The anal piate is more marbled in harrisoni and the outline 

 is more rounded terminally as in zonaria, than in denhami. Fur- 

 ther, the yellow outline is sharper and clearer. 



The spiracular stripe is slightly paler and broader and has 

 less tendency to branch in harrisoni, and the yellow spot, inhe- 

 rited from hiriaria, is less observable. When présent, the yellow 

 spot beneath the spiracular line is more linear than in denhami. 

 The prolegs follow the anal piate in the character of the markings. 



