RH0DITES EGLANTERLE. 39 



leaf- vein, and the attached part does not show on the 

 other side of the leaf by a projection. The inner cell 

 is large, the bounding wall of parenchymatous cells 

 being thin, seldom being much more than 1 mm. in 

 thickness. 



When the galls have been attacked by the inqui- 

 line Periclistus caninse they become larger, more 

 irregular, and instead of having one large cell they 

 contain several, united by a spongy tissue (see 

 PI. XT, fig. 3). 



The galls are usually found on Bosa canina, less 

 frequently on B. rubiginosa, and I once found them on 

 B. eglanteria and B. spinosissima. When ripe the 

 galls fall to the ground, and give forth the insect in 

 the following spring. 



The galls of Bhodites centifolise (a species not yet 

 found in this country) cannot, so far as I can make 

 out, be distinguished from those of B. eglanterise. 

 The galls of the former, however, are said to be found 

 only on the leaves of Bosa centifolia. 



B. (Hololexis) rufipes, Foerster, is said also to have 

 galls like those of B. eglanterise ; but it is difficult or 

 impossible to say wherein the differences between the 

 galls or insects lie. 



Parasites. — Hemiteles imbecilus, Gr. ; Torymus 

 difficilis, Nees. ; T. congener, Foer. ; T. viridis, Foer. ; 

 T. eglanterise, Mayr; Oligostenus stigma, Fab.; Eulo- 

 phus inunctus, Nees. ; Pteromalus inflexus, Foer. ; 

 Tetrastichus longicaudatus , Ratz. ; T. obtustatus, Gir. ; 

 T. rosarum, Foer. 



Brischke (Schr. d. ISTaturf. Ges. z. Danzig v.) records 

 Torymus auratus, T. tipularum, Zett., Tetrastichus lep- 

 toneurus, Pteromalus pilosus (T. pilosellus ?), T. in- 

 crassatus, Ratz., T. Neostatensis, Ratz., Eurytoma 

 rosse, and Orthopelma luteolator. 



Commonly distributed in Britain. 



Continental distribution : Sweden, Germany, and 

 Holland. 



