( i* ) 



June 24. Third moult. Larvse in fourth stage are still 

 black ; hairs whitish. Front of head pale green ; 

 some show small portions of green colour on body. 



,, 29. Eighteen larvse in fourth stage given to Professor 

 Poulton, for the Hope Department. Five others 

 were afterwards given to another friend. The 

 subsequent history refers only to six specimens 

 finally retained by me. 

 July 5. Fourth moult. In fifth stage the ground-colour is 

 generally black ; a variable amount of green may 

 be present in addition ; in two out of the six the 

 green predominates. Tubercles yellow, deepening 

 to orange. 



,, 20. First larva began to spin cocoon. 



„ 21. Three larvse now spinning. The cocoons are those 

 marked 1969 in the exhibit. These three larva? are 

 black with orange tubercles, one is mottled with a 

 little dull green. All the larvse have throughout 

 been variable, but especially so in the last stage, 

 varying from bright green with black rings (like 

 S. pavonia) to uniform black. Tubercles orange 

 in all. 



,, 24. A bright green larva with definite black rings, 

 began to spin. This cocoon is the one marked 

 1443. 



„ 27. Another larva, resembling the last, now spinning 

 (cocoon numbered 1327). The last larva retained 

 by me, a specimen with much less green ground- 

 colour than the two just noted, also spinning 

 to-day (cocoon 1273 in the exhibit). 



" These larvse all had a profuse diarrhoeal discharge before 

 spinning ; the discharge was clear and colourless when emitted, 

 afterwards becoming brown. A period of quiescence, lasting 

 for twenty-four hours or thereabouts, intervened between the 

 discharge and spinning. During this period the larvse seemed 

 shrunken and looked torpid and unhealthy. The cocoons were 

 spun among twigs of the food-plant (whitethorn) with few or 

 no leaves, in a glass cylinder resting on a white glazed plate. 



