36 [February, 



about rS mm. lonpj. is, when sufficiently magnified, rather handsome. 

 It has a dai'k green dorsal line (dorsal vessel and food mass beneath), 

 paler green elsewhere, with a series of horse-shoe-shaped red marks 

 (opening upwards) round the spiracles. Seen dorsally, there are 

 oblique green lines (downwards and backwards) from the dorsal line, 

 ending in a pink-red line about middle of slope with another just 

 below spiracles. Seen laterally, there is a dorsal pink-red line (the 

 food beneath makes this green on dorsal view) then a marbled green 

 one, and then the broad pink band above and below spiracles. 



In the second instar, the oblique lines are plain enough. In the 

 first instar, it is remarkable that one sees them, but on further 

 magnification to make them plainer, they are not visible. The colour 

 scheme is much as in the first instar, but when magnified is seen to 

 depend on irregular patches not easy to describe. This larva was 

 hatched on August 28th, and is now (in 2nd instar) 3'3 mm. long. 



September . In its fourth (penultimate) instar the larva is 

 handsome, with a very definite dark green dorsal line, bordered by 

 paler, that is almost yellow. The lateral line on flange has a very 

 bright reddish-pink colour ; between these the almost yellow oblique 

 lines are very marked, four on each segment, the lowest close to flange, 

 rather obscure, and may not be observed, llach oblique streak therefore 

 appears to be complete, downwards and backwards, across four 

 segments. The red lateral line is red from the 2nd to the 7th 

 abdominal segments. For the other segments it is at first rather yellow ; 

 as the larva grows the red becomes rather rusty, the yellow becomes 

 whitish, and continues as a border along the upper margin of the 

 rusty-red. 



In the last (5th) instar, the red lateral line is dull rusty in colour 

 and the oblique lines are pale, but not yellow ; the spiracles are orange 

 and rather conspicuous. Of the hair-bases some are black, some 

 yellow, the latter more dominant dorsally and about the middle of 

 each segment. They are rather brilliant and sparkling in direct 

 sunlight. The larger, pale rufous hairs, are still rather abundant 

 dorsally and laterally. 



On October 2nd, the largest larva was 10 mm. long, and though 

 still eating, was assuming a much darker tone, the ground-colour 

 being a rich but pale pinkish brown, on which the pale, hardly yellow, 

 oblique lines are very distinct. Being now more obvious than at any 

 other stage, it is easy to see that on each segment, the most dorsal of 

 these is the pale border of the dorsal band, now much of the general 



