27 



species of insects. The lad3'birds in both adult and larval stages fed 

 greedih'on the eggs of the plant-lice and the young lice as soon as they 

 hatched. Accompanying the beetles was also noted several species of 

 predaceous bugs, the most common one being Podlsus serieventris. 

 Although this species was occasionally found feeding on the plant-lice, 

 it was continually observed preying upon the ladybirds in all their 

 stages. The particular species upon which it was taken in the act of 

 feeding were Adalia hipanctata in the o^gg^ larval, and adult stages; 

 CoccmeUa trifasdata., and Chilocorus hivulnenis. Four specimens of 

 Podisics serieventris were once oliserved feeding on a single adult Adalia 

 hijnmctata. 



It is a well-known fact that many species of insects will become can- 

 nibals if kept in confinement with insufficient food, hut Adalia hipunc- 

 tata has been observed repeatedly in the woods feeding upon the eggs 

 of its own species when plenty of other food was available and within 

 easy reach. 



By the last part of July scarcel}" a plant-louse or a ladybird could 

 be found in the locality where they had both been so abundant. 



Several species of Coccinellida3 were bred in confinement, and the 

 following table giv^es their egg-laying records. A pair of beetles was 

 placed in each jar with food, and the record was continued until the 

 female died: 



Egg-layiug records of several species of ladybirds. 

 [The asterisk (*) indicates the date on which the experiment was begun.] 



