76 



shown in fig. 5. This change of colour for hibernation was described 

 by Zeller in 1849, " Stett. ent. Zeit." vol. x., p. 177-182. 



I may quote the following from my notes : — • 



September 9th, 1918. — The first stage larva, when a little grown, 

 about l-5mm. long, is, when sufficiently magnified, rather hand- 

 some. It has a dark green dorsal line, paler green elsewhere with 

 a series of horseshoe-shaped red marks 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. It is remarkable that on further magnification these oblique 

 lines are not visible. They are, however, plain enough in the 

 second instar. 



In its fourth instar (penultimate) the larva has a very definite 

 dark green dorsal line, bordered by paler, that is, almost yellow. 

 The lateral Ime 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. Each 

 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. On the other segments it 

 is at first rather yellow ; as the larva grows the red becomes rather 

 rusty, the yellow becomes whitish. 



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 are 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. 



When almost ready for pupation, although still eating, the larva 

 assumes a much darker tone, the ground colour being a rich, but 

 pale, pinkish-brown, on which the pale, hardly yellow oblique lines 

 are very distmct. 



When apparently definitely fixed as if for pupation the larva is 

 very dark, having passed through a red-brown stage in which the 

 oblique lines were especially conspicuous. The larva observed 

 made a nest at the bottom of the tin under a leaf with enough 

 spinning to be almost entitled to be called a cocoon. This proved^ 

 however, to be for a hibernaculum. 



Plate VIII. will give some idea of the distribution of hairs and 

 ienticles in the first instar which conform to the general Lycienine 

 type. 



