EHODITES NEKVOSUS. 43 



petals. As a rule polythalamous, specimens are some- 

 times found with only one cell. I have found three 

 separate monothalamous galls on one leaf. Those 

 on the twigs remain attached; those on the leaves 

 fall with them, and apparently the gall-bearing leaves 

 drop off earlier than the others. 



In this country I have only found the galls on Eosa 

 spinosissima, on which along our shores it has a wide 

 distribution, being found from Sutherlandshire to the 

 south of England. On the Continent it has been 

 found on B. canina. 



Mr. Inchbald (Zool. S. S., 7824) describes a " Gynips 

 rosse-spinosissimse" which I cannot identify satisfac- 

 torily from the shortness of the description : " Colour 

 black; antennae geniculate, hairy; head and thorax 

 dull black, pitted and dotted over with pale pile; 

 abdomen shining black; legs black, with the tarsi 

 paler. Insect much smaller than Gynips rosse." It is 

 evidently not spinosissimse, Grir., nor does it agree 

 with the species of Periclistus. 



As parasites it has Torymus macropterus, T. diffi- 

 cilis, Nees., Megastigmus transversus, Walker, Ptero- 

 malus injiexus, Foer., P. incrassatus, Ratz. (Brischke) ; 

 Tetrastichus aurantiacus, Ratz., T. rosarum, Foer. ; and 

 as inquiline Periclistus caninse. 



Continental distribution : Germany. 



4. Rhodites neevostjs. 

 PL XI, fig. 4, gall ; PI. XII, fig. 9, ? . 



Ehodilus nervosus, Curtis, B. E., 688, pi. cccxx ; Marshall, E. M. 



M., iv, 174. 

 Rhodites rosarum, Giraud, Verh. z.-b. Ges. Wien, 1859, 366 ; 



Schenck, Nass. Cyn., 92, 94, and 129; 



Taschen., Hym. Dent., 135 ; Mayr, Cyn. 



Gallen, 18, Taf. iii, f. 18; Europ. Cyn., 3; 



Fitch, Trans. Essex Field Club, ii, 125, 



fig. 7. Cf. also Gray, Proc. Ent. Soc, 



1858, p. 94. 



Black ; the fore-legs with the knees and tibiae pale ochreous ; the 

 middle tibia? usually obscure reddish-yellow ; the hind legs dark 



