EARTH-MASON CATERPILLARS. 205 



Earlh-Mason Cate,-pillui-'s Nests with the perfect Moth, 6fC. 



The grubs of several of the numerous species of 

 may-fly i^Ephcintra) excavate burrows for themselves 

 in soft earth, on the banks of rivers and canals, under 



VOL. IV 18 



