SOME DERBYSHIRE PLANT -GALLS. —II 



13 



JAMES MEIKLE BROWN, B.SC, F.L.S., F.E.S., F.C.S. 



Since the previous list of plant-galls found in Derbyshire 

 was prepared {The Naturalist, October, 1919, pp. 330-332), 

 a number of additional galls have been obtained. These were 

 collected from the same parts of Derbyshire as referred to 

 before, but most of them are additional also to the list given 

 by E. and H. Drabble {The Naturalist, Jan., 1920, pp. 11 -15). 

 In two or three cases fresh localities are given for galls 

 previously listed. 



Several here recorded appear to be distinctly scarce in the 

 district, only one plant of Viola canina was noticed galled by 

 Perrisia ajjinis, and Aiilax glechomae observed last year in 

 Via Gellia was not found this year. Although dozens of 

 heads of Centaur ea nigra were examined, no galls of Urophora 

 solstitialis were found, though this gall is quite common in 

 many parts of Yorkshire (Brown, The Naturalist, February, 

 1920, p. 74 ; Falconer, The Naturalist, December, 1919, 

 p. 392, and December, 1918, p. 384). 



In the meadows at Bakewell were several plants of 

 Lathyrus pratensis, of which the leaflets of the upper leaves 

 were folded boatwise, and within the fold several individuals 

 of a species of Thrips were living. The appearance suggested 

 an incipient gall-formation. Thrips, I believe, are not known 

 to produce galls in this country, though they are reported to 

 do so in France (Houard, Les Zoocecidies des Plantes d' Europe, 

 pp. 1339 and 1345), Germany (Houard, op. cit. p. 1468), and 

 Australia (Sharp, Cambridge Natural History, vol. 6, p. 530). 



Hymenoptera. 



Trigonaspis megaptera Panz. On oak. Scarce. Holmesfield. 



Pontania salicis Christ. On Salix purpurea L. Bakewell. 



Andricus curvator Hartig. Common on leaves of Qitercits Robiir L. 

 Stanton -in -the-Peak 



Cryptocanipus venustits Zadd. On Salix Caprea L. Leaf -base and 

 petiole swollen, with a more or less central cavity containing 

 the whitish grub. Swanton [British Plant Galls, p. 148) seems 

 to refer to C. saliceti Fall, as also causing enlargement of the leaf- 

 base and petiole. Houard (op. cit. pp. 137 and 142) gives C. 

 venustits as producing enlargement of the leaf-base and petiole, 

 and C. saliceti and C. ater as attacking the axillary bud. Plentiful 

 amongst a group of young trees, Stanton-in-the-Peak. 



Dryophanta similis Adl. form longiventris (Hart.), on leaves of oak. 

 Not common. Stanton-in-the-Peak. 



DiPTERA. 



Contarinia campanulae Kie&. On Campanula rotundifolia'L. Plentiful. 



Eyani Moor. 

 Contarinia helianthemi Hardy. On Helianthemum Chamaecistus Mill. 



Lathkil Dale. 

 Contarinia steini Karsch. On flowers of Lychnis dioica L. Bakewell. 

 C. beiulina Kieff. On Betula alba L. Bakewell. 

 ? C. barbichei Kieff. On Lotus corniculatus L. Upper internodes- 



1931 Jan. 1 



