50, Bureau of Entomology, U. S. Dept. of Agncultu 
Plate XII!. 
Pupal Cells of the Bollworm. 
^'^' ^raS^nf nn^^^.1 .2!!'''''^°' '? '*' ^^"9"' ^^ the soil, somewhat enlarged: % 2 plaster of Par 
cast, ot pupal cells, showing variation in depth and direction, natural sfte (original ^ 
