NEW BRITISH CECIDOMYIIDAE, 149 



New British Cecidomyiidae. 4. 



By RICHAKD S. BAGNALL, F.R.S.E., F.L.S., F.E.S., and J. W, 

 HESLOP HARRISON, D.Sc, F.R.S.E. 



{Continued from vol. xxaiv., p. 66.) 

 Many of the following reoords are largely due to our now having 

 access to further continental literature, in particular to the valuable 

 contributions of Riibsaamen published during the progress of the war 

 and, therefore, not then available to British Zoologists. Many species 

 affecting common plants are so extraordinarily local and isolated that 

 Oiily the most determined and constant research will yield success; the 

 species from elder, beech, and Raiiunniliis acris recorded here are 

 cases in point. 



Olif/otrojiJuis schmidti, Riibs. 



On Jiutipenoi ; a small obscure gall. 

 Durham, Chester-le-Street, Langdon Beck. 

 MoRTHUMBERLAND, Blanchlaud, Eglingham. 



P/ieffo)n)/ia fagicolns, K. 



On Fa;/ lis, Houard, 1158. Leaf discoloured, hypertrophied and 

 folded between the secondary veins ; each fold containing two or three 

 red larvae. 



Scotland, Crieff, on one tree only, September, 1921. 



Psectrosania tainarivia, Stefani. 



On Tiniiari.c (jallica ; young twig swelling, "with large cavity. 



Devon, Torquay district, twice, including an example extra- 

 ordinarily like the one figured in Houard. 



Sussex, Bexhill, December 30th, 1921, two examples, in each case 

 causing a bend in the young twig. Recorded in Houard from Sicily 

 and Portugal. 



Iriliopalutinjia crutae-iialli, Karsch. 



On Ilhiiiant/uis crista-f^alli ; flower distinctly deformed, faintly 

 pilose; larvae gregarious, white. 



YoRKS., near Moorsholm, July, 1922. 



Durham, Widdy Bank Fell, near Langdon Beck, August, 1922. 



Macrolabis holosteae, Riibs., 1917. 

 On Stellaria holustea ; terminal gall ; larvae creamy-yellow. 

 Northumberland, Stocksfield, June, 1922. 



Macrolabis sp. 

 Leaves of Hi/pochaeris radicafa ; larvae white (? M. hieracii). 

 Northumberland, Seaton Sluice, August, 1921. 



Geodiplosh ranunculi, K. 

 . A shining red larva, living in the roots and lower part of radical 

 leaves of [laniiuciilns acris. 



Northumberland, Stocksfield, Hexham, July, 1922, rare. 



i'rofeltit'lla rainiiicidi, K. 

 An amber-yellow larva, accompanying the above is probably 

 September 15th, 1922. 



