CENOCYTES OF PLATYPHYLAX DESIGNATl - 



serving during the periods of moulting and pupation, when the 

 Malpighian tubes art- functionless. 



An-la- 1900) describes the oenocytes as more or lc>- anneboid, 

 and with n<> -pecial distribution in the Hymenoptera, except 

 their existence in the abdomen alone. Except for a relative 

 increase in volume, they remain throughout the life-cycle, in 

 both di-tribution and structure, very similar to what they are 

 in the e.irK larxal stages. He sucue-t- that they perhap- -ecrete 

 about them-el\e- ferment-. an<l con-ider- them a- glandular cells 



.mating from the hypodermi- and functioning as organs of 

 internal SC( ret ion pcrhap- for di >ciati\ c purpo-r-. Tin- pnul- 

 in i- <i| theii ; ion may serve for the general nutrition of 



tin- ti--iie- of tin- bodv or even tor the cytol\-i- of th<>-c larval 

 cell- de-tined to di-apprar. 



KO-I hc\ niko\ [900 . in hi- \\ ork mi the tat -bod v and < i-m >c\ tes 

 ol the hotn-\ -be.-, hnd- that nio-t ot the lar^e CEDOCytes "| the 

 lar\a li-int - rate in the pupal -omr of them continuin-. 



ho\\e\i i. into the bei;inniii^ of the ima^inal stage. In a \oim- 

 ])ti|i.i, a second .'-neration, to \\hich he gives the name 



" Imaginaloenocyten, 1 arises from the h\ podermi-, and tip 



OenO( \ l - an lab i di-tribllted aiilon- the fat-bodie-. 'l'he-e are 

 onl\ one tilth a- 1 .:. the lar\al cenOCytCS and are toiined 



01 1 K in the pupal st . Ib observed inelu-ion- iii -onie of tin- 



cell-, and on t hi- ba-i- came to t he oiiclu-ioii that I hex are to be 

 loii-idend .1- excn in-, uithout " Au-fiilinm^-^an. 



\\hi(h serve as Storage place- tor > product- ol excretion. 



Vane) 1902 says < : \3iSimulia, \e Culex, \eChironomus, 



durant la | eriode iivmpliale ie in \oj- aiicun chani;i-ment dan- 

 celluli llou,\er, he ob-et \ e- iii .^iniiilinni that the num- 



ber of Oenocytes appears tO have increa-ed at the end of pupation. 

 He conclude-: "ChCZ le- /'.'/'/' Ie- OenOCytCS He -llbi ellt 

 aiicune hi-lo|\-e durant la ii\m]tlio 



1'en / [903 states relative to tlu- di-i overy of l\o-ehe\ niko\ , 



(oiiiernin^ the origin of a -econd oenocyte generation, that this 

 opinit ni -eem- to In erri >iu-i >u-. 



!<<" i- 10041 t!iid> that, in the ('\nipid.e. the CEttOCytes are 

 limited to tin- abdomen. The lar\al oenocytes n-.ich a length 

 as great as l.^o M and attain a proportionate length one tilth that 



