4o6 'Falconer : Plant Gall Foray at Leeds. 



Bracken. 

 DIP. Perrisia jilicina Kieff. Roundhay Park. 



MOLINIA. 



DIP. Mayetiola ventricola Rubs. Adel Moor, in plenty. 

 Willows. 

 HYM. Pontania proxima Lieb. On 5. alba, fragilis, aiirita, cinerea 

 and caprea ; commonly throughout the route. 

 P. pedunculi Htg. On 5. aurita. Adel Moor, near the bog. 

 P. viminalis Htg- On 5". cinerea, Adel Moor. 

 DIP. Iteomyia capreae Winn. On S. caprea, cinerea and aurita. Adel 

 Moor . 

 /. capreae Winn, var. viajov Kieff. On 5. cinerea and aurita, 

 with the last. 



Rhabdophaga nervorum Kieff. On 5. cinerea, with the last. 

 There was also a slight swelling of some lateral veins and a 

 bending of the leaf, probably due to the same agent. 

 AC. Eriophves salicis Nal. On S. caprea, cinerea and aurita, Adel 

 Moor. Aspen. 



DIP. Perrisia. populeti Rubs. On the confines of Adel Bog, one 

 example. Have noted it also in Askham Bog, and at Thunder 

 Bridge, near Huddersfield ; in the last named place in fair 

 quantity. It is not given as a Yorkshire species in Messrs. 

 Bagnall and Harrison's list.* 

 Birch. 

 DIP. Semudobia betulae Winn. In female catkins, Adel Moor. 



Contarinia betulina Kieff. Adel Moor. 

 FUN. Exoascus iurgidus Sdbk. Roundhay Park and Adel Moor. 



Alder. 

 AC. Eriophves nalepai and E. brevitarsus Fckn. — Roundhay Park 

 and Adel Moor. 

 Eriophves spec. Houard 1135, ' abnormal rows of brown 

 hairs along the nervures ' ; Adel Moor. No mites of ' erio- 

 phyed ' form were noticed, but a number of tiny ones belonging 

 to the Tetranychidae, whose glistening and globular eggs, 

 large in proportion, arranged systematically along the nerves 

 in their axils, and often separated by exact intervals, form a 

 wonderful and interesting sight. 

 FUN. Frankiella alni R. Maire. Adel Moor. 



Oak. 

 HY]\I. — Andricus solitarius Fonsc. Near the Upper Lake, Roundhay 

 Park and Adel Moor, one example at each place. 

 A. ostreus Gir. General throughout the route. 

 A. testaceipes Htg. In leaf petioles, the Gorge, Roundhay Park. 

 Cynips Kollari Htg. King Wood Lane. 

 Dryophanta verrucosa var. divisa Htg. Occurred throughout 



the route. 

 D. agama Htg. Roundhay Park and Adel Moor. 

 Neuroterus albipes f. laevinsculus Schr. Roundha}' Park and 



King Wood Lane ; not in any quantity. 

 N. baccaram f. lenticularis Oliv. Throughout the route in 

 extraordinary abundance, especially in Roundhay Park, 

 where the lower surface of all the leaves on the young shoots 

 was completely covered with overlapping, and often distorted 

 spangles. Old galls of A', baccarum were still in evidence. 

 N . vesicator Schl. One example Roundhay Park. 

 A'', vesicator f. numismatis Oliv. Colonies of this beautiful 

 gall occurred throughout the route. 



* The Naturalist, October 1921, pp. 337-341. 



Naturalist 



