NliW BRITISH CKCIDOMYIIDAE. 



151 



NoRTHUMBKiiLAND. Hexhcim iind Coi-bridge. 

 ScoTi-ANi), Melrose district. 



We have known this species for some time but were under the im- 

 pression that it was already known for Britain. 



I'firisia raiilaiinnicola, Riibs., 1915. 



Bright red larvae feeding gregariously on Cardamine pratensia are 

 referable to this species. Gall and larvae strikingly distinct from those 

 of Perrisia ccirdainum, Winn. 



Durham, Burnhill, June, 1922. 



Perri^ia drijopldla, Riibs., 1917. 

 Light reddish larvae in galls of Arnoldia and ( 'ontarinia (jiwrcma ; 

 apparently not uncommon where the host-galls occur. 



Perrisia jaapiana, Riibs., 191-1. 

 (Not P. jaapiana, Riibs., 1917, from Spiraea idmaria). 

 This is B. and H. 158, a leaf-pod gall on Mdilntns liijndina. 



Perrisia fusca, Riibs. and P. oxijarantliaf, Riibs. 



In unopened flowers of (Jratae;/ns, the former with yellow to orange 

 larvae and the latter with red (usually brick-red) larvae— much later 

 than drntarinia anthohia and therefore liable to be overlooked. 



Both apparently widely distributed. 



Perrisia tiUpendulae, Kieffer {nan S wanton). 

 Spiraea /ilipendnla ; red larvae in closed flowers. 

 YoRKs., in a garden !it Aislaby, near Whitby. 



Perrisia rossi, Riibs., 1914. 

 This is apparently B. and H. No. 405. 



I'errisia squamosa, Tavares. 

 B. and H. No. 379 in part ; the form with whitish larvae ; usually 

 solitary. We find acorn-cups also affected by pale salmon larvae 

 feeding in groups of three or four. 



Perrisia trotteri, Tavares. 

 On Cytisns scoparins ; gall m end of twig like that of Janetiella 

 tuherculi, but larger and containing a red larva. 

 Durham, near Lanchester and Lintz Green. 

 Devon, near Sidmoutb. 

 Recorded by Houard from Portugal. 



Perrisia rallisiiiiibrosae, K. 

 On Pi/tistis s<-(ip,iriiis ; leaflets folded in form of a pod, thickened 

 a»d discoloured, coutiuning a few red larvae. Houard, 3431. 

 ScoTi,ANi>, Crieff, rare, September, 1921. 

 Recorded by Houard from Italy. 



Perrisia licdivlcei, Riibs. 

 On I'inipinella sa.rifrai/a ; affecting the leaves and the bases thereof 



