PLATE i NESTS OF MASON-WASP. Frontispiece 



Odynerus tunnels into banks and provisions her cells with caterpillars. Whilst the 

 work is in progress she constructs curved tubes of the excavated material to keep 

 out the ruby-tailed wasp, which is a parasite. (See p. 7z.) 



Drawn by T. Can eras. 



