4 Mr. J. C. W. Kershaw on Gerydus chinensis. 



amongst the green Aphides, I fed the larva? thereon, but a 

 typhoon having washed away the food supply, I could 

 only find the slate-coloured species, which, however, the 

 larvas seemed to enjoy quite as much. But I noticed soon 

 after that the colours faded and the purple-brown tended 

 to mingle with the yellow. This is a question it will be 

 interesting to decide. One of the features of this curious 

 life history is the calm way in which the larva moves 

 amongst the Aphides and selects his prey, and the in- 

 difference with which the latter apparently accepts his 

 fate. 



I have since found swarms of a bright yellow Aphis 

 on some Asclepias plants, on which I hope to rear some 

 larvae, with the object of testing their adaptability of 

 colour to their surroundings. Gerydics chinensis lays at 

 intervals all through the year, but these eggs were taken 

 in July and August. 



Explanation of Plate I. 



Life History of Gerydus chinensis, Felder. 

 Butterfly laying egg amongst Aphides. 



Fig. 1. Egg, enlarged. 



2. Larva just hatched, enlarged. 



3. „ nearly full-grown, natural size. 



4. Pupa?, natural size. 



5. Larva eating Aphis, enlarged. 



6. Aphides, two species, enlarged. 



