— 149 — 



Larva: Length 7-8 mm. Pupa: Length 5 mm. Both larvae and 

 pupae resemble those of the preceding species. 



The beetles pass through the winter and lay eggs in April. Larvae 

 feed on scale insects of genus Lecanium or their eggs ; they pupate toward 

 the end of May and two weeks afterwards turn into imagoes. One imago 

 often devours more than 200 larvae of the white wax insects in a day. 

 The imago of Novius limbatus Motsch. and larvae of Scymnus sp. also 

 feed on the larvae of the white wax insect. They are, however, not numer- 

 ous. The insect known among Chinese as the " wax-dog " seems to be no 

 other than a lady-bird of this group. 



6. Birds. 



From autumn to winter, 1913, singing birds too prey on Female 

 coccids to no small degree. 



EXPLANATION OF PLATES 

 Plate XII. 



(Figs. 1.— 17.). 



Egg. X 35. 



Newly hatched larva, x 35. 



Ditto. Ventral surface, x 35. 



Ditto. Antennae, x 100. 



Second larval stage. x35. 



Ditto. Ventral surface. x35. 



Ditto. Antenna, x 100. 



Young female. x20. 



Ditto. Lateral surface. x20. 



Third stage of the male larva. x20. 



Male pupa. x20. 



Adult male. x20. 



Male larvae on the under surface of a leaf. 

 Fig. 14. Female larvae on the upper surface of a leaf. 

 Fig. 15. Male larvae on a twig. 



