Bui. 59, Bureau of Entomolo^, U. S Dopt of Agncu 



Plate IV. 



I'^i-^lFERATUN FR_'V. AUTIFICIA^ STI V u LA T ' jN. 



Fijf. i:i.— ITolifcriitioii ill soods fi>lli)\viii>r iirtilicial siiniuliitii>n with injcciion of wiitcr. fnlniX'"! 

 three diiimeters. Fiff. 14.— fmlifenitioii in <ar|>«'l iiml M-cd following' iirtiliciiil treatment with 

 aeetie acid. Fitf. l.i.— Prolifenitioii fmiii cartH-l and xepinm envelojiitiK larva in JmiII. Fie. 

 16.— I.4X k of Im>I1 liiip<t open by pressure of proliferation formed within. Fi||P<. 14-lt> sliglitly 

 enlarifiMl. i()rii;inal. i 



