(ENOCVTES OF PLATYPHYI.AX DESIGNATUS. 223 



llaberlandt 1^72) observed them in the -silk-worm, where 

 they were described by him as an organ of unknown function. 



Graber (1873) separated the oenocytes sharply from the 

 pericardial cells, and called them "ein.ne-pren^te Zellen." He 

 -aid regarding their function: "Ohm- Xweifel halien wir es hier 

 mil ei-niarti.uen rin/rlli-ru 1 >rii-en y.u thun, iil>er dereii -eeivt 

 ullerdini;- nicht da> < ".erinu-tr liekannt i-t." 



The name " < leiiorythen " ua- ;^i\ni to the-e cell- by \\ielo- 

 \\iei-ki [886 "ii account of their n -rmblamv in rolor, in the 

 larva of Chinni< white \\ine. Tlu-y \\ere ob-erved by 



him lo be mrtamrrieally n-peated under the hypodermic of the 

 alMlnmiii.il segments and arran-o-d in -mall ur"iip> -iirrotindin- 

 or ne.ir t" tl, M.ii.i. Thi- ua- tin- nio-t r\ieti-ive \\ork on 



the OBI hi- time- for \\'ielo\\ iei-ki wa- -in i'e--ful 



in ideiitif\ inv; tlii-m in the 1 )iptera, ( 'oleojurra. 1 1\ iiH-no|it.-i .1 



and Lepidoptera. He in. hide- tin- . \\\.- elemt-nt- 



of the M'.od ti u- .lll'i . "... d.i-- -ic alle 



\ oil drill -if lllllv' Ix-ndrn Mrdilllll ^-\\i--r ^lol'lr all f Hell Illell . 



yeit\\ri-r .mt-pri hrrn re-|>. \rrarlieiten und ir^'iid \\rlehe I m- 

 >at/prodnkte .in da--rlle zui i'-n und dadtuvh .ml die in 



den I l.uipti;r\\< : ai-mii- \nr-ieh ^rlirndrii .\--imila- 



tioii-- und 1 )r-.i imilatioii-.p- einrn Kiullu an-iil irii." 



K"\\.ile\ -k\ [887 .it tributril to thr u-lloe\ ; ^l.illdlllar 



function. 



\Vr-i -n l s 'il J in hi- \\ork on the -ilk-worm gives them the 

 name "< . llulr ^l.mdnl.iri hypostigmatische," and find- their loe.i- 

 tion e\( ln-i\r|\ under anc| behind the -ti^m.ita of the abdominal 

 -eminent-. A- e\ ideiicrd b\ thr number of \a.-u..|r- iii iln-ir 

 i \ lopla-ni during the lar\al - lie attributr- to them a -lan- 



dtilar lunetion. At the time of the -pinnini; of tin in, t \v o 



or three d.i\- before pupation, a -ee. md irnitcyir -nirr.it ion ap- 

 pear- in bro.id |. : :i tin- \nitral part of the third, fourth, and 

 the lifth abdominal -e-meiit-. Thr-r attain a -M/e of (.^ in 

 the -i\-da\ |.npa. and br-in at thi- t'me to di\idr bv amito-j-. 

 The lar\al .enoc\ tr- prr-i-t to the end of the life of the individual, 

 - mueh as i.V'M m "' /l '- 



Grabei [891 places the cenocytes with the blood ti--ue and 

 i;i\e- their origin a- .etodermal. Hi-. howr\.-r. eoii^iders them 



