INSECTS AT WORK AND PLA\ 



rare. As far 

 north as York- 

 shire the two 

 species are 

 very nearly 

 balanced as 

 to n u m - 

 bers, but 

 when we 

 reach the Uists 

 in the Outer 

 Hebrides the 



LOOPER CATERPILLARS ON IVY. 



positions are 

 entirely reversed. 



The black bee 

 with the orange- 

 tipped abdomen 

 appears to be 

 much more 

 evenlv distributed, 



