EXPANSION OP PERFECT INSECTS. 337 



Duta case "r tfj' ^''^"""'/ *» ^^^ape from the pupa; a, the fly; b,lhe 

 rasp rthPfl P"''','^'^'" ^"'■^^'«'' -iclvanced; c, the fly; rf, the pupa 

 ruDaci;. 1) r^.^''^""'^/ ^f ^' ^"'' f°™'n§ '^'^ ^^'-^'^^ ^' '^e fly; A the 

 ^x^ansioS on'hJ';?4'.^"'^^"S ^^^^ ^^^ '^^dy.so aa not to obstruct the 



VOL. VI. 29 



