138 J. Rei.txvaan — DociKKs v. Lkktwen 



As f;ir ;is \\ c roiild stM% Mit' iirst note was of i>(_>rcilÉ (1) and 

 he named the ,uall-]»ro(hiêor Cynips Ehoeadis K\ug. But Kieffek (2) 

 has taken tl)e name of Perris and we shall do so too. 



In one of tlie latest parts of Marcellia we find an article by 

 Mr. Hói'ALiD {'A) . in wliicli lie tells of ha\ in*>' fonnd Aul. p((p. on 

 P a ]). L e ( o (| n i. Also he names in the w(n'k of himself and Mr. 

 ÜARBoix (4) two kinds of I* a ]> a v eis: P. r h o e a s and d ii- 

 l) i u m on wliicli this AuUi.v makes its yalls. In the stndy of HiE- 

 ROA'V^irs (.■)) we oidy tind this j^all mentioned for P. d ii b i n m. 

 Goi'iiY and (UiCr.Nox ((>) lia\-e found also galls on P. a r g e m o n e. 



It is of imporfanee to look closer at the fact, that different P a- 

 ]) a V e r s may be infected by AiiUi.v jxtp. 



It is a moot point if the instinct of a gallwasp is complete or 

 incomi»lete, i. e. if an insect ])nts its eggs only on that ])lant or that 

 jiart of the plant, where tin' gall edit de\elop, or if it lays its eggs 

 on other organs, the galls not de\elo]>ing there because of these parts 

 being incapable to the formation of galls by the influence of that 

 gall-insect. It is known of several insects that they never ])ut their 

 eggs on otluM' i>lants than they are used to or if they do apparently 

 with great dislike and every one, who has sometimes cultivated an 

 amount of gall - insects and did not know the i>eculiarities of his 

 animals, will ha\-e found this more or less to his own disadvantage. 



The e.\]>eriment of making insects lay eggs on other ])lants than 

 thev ai'c used to is till now onlv known from the fauKuis researches 



(J ) 1'. F. Hocchi'; — Niitui'i;vscliii'litt' dfr IiiHecteii, Itesonders in Hiusiclit ihrer 

 crsleii Zustände als l^aiven und l^nppen 1834, p. 164, n. .")"). 



(2) J. .1. KiKFi'KH — Species des HynK^nnptères d'Europe et d' Al/Jérie. E. 

 André l^es C'ynii)ides tome septième. 1897-1901, i>. 303, n. 9. 



(3) HoiAHD — (ilaiinres (•é(id()l()i;i(|iies. 1. Cécidie de l'Anliix ]»a))averis l'erris 

 sur le Pap. Lec()(ini Laniotte. Marcellia, \id. ^', III 1906, ]>. 65. 



I) l>Ai;i5()rx et HoiWKi) — Catalogne systeniati(|ne des znoet^eidies de !' En- 

 ro])«' et (In l)iissin mediterranee. 1901, n. 1921, 1924. 



(5) HiKKONVMUS — ßeitriiyv znr Kenntnis der enropaeisclien zooeeeidien und 

 der Verl)reitun;i' deisellicu. Erj;;in/,nn<;-sheft zui' (i8 .Jalirl»er. den scliles. Ges. 1'. va- 

 terl. Cultur ISIO. n. 61,S. 



(H) (toikv et (iri(;N()\ — Insectes parasites des l'apavéraeées et des Fnma- 

 riacces. Feuille jeunes nalur. Paris t. 5. 19or>. 



