54 BRITISH GALLS 



The following list of British lepidopterous gall-causers is 

 arranged according to the food-plants of the larvae : 



Agrimony, Hemp {Eupatorium canndbinum Linn.), 



Pterophorus microdactylus Hiibner : Swelling in the stem. 



Alder {Alnus rotundifolia Mill.). 



ArgyyesthiaGoedartella\Arm.: Staminate catkins swollen 

 and deformed. 



Epiblema tetraquetrana Haw. : Twig swollen at base of a 

 petiole. 



Aspen {Populus tnmula Linn.). 



Nepticula argyropeza Zell. : Petiole swollen close to the 

 leaf. 



Laspeyresia coroUana Hb. : Shoot swollen. 



Honeysuckle {Lonicera Caprifolium Linn , L. Periclymenum 

 Linn., and L. Xylosteum Linn.). 



Omeodes hexadactyla Linn. : Flowers swollen, not opening. 



Juniper (Juniperus communis Linn.). 



Lobesia permixtana Hiib. : Knotty swelling on the stem. 



Knotgrass {Polygonum aviculare Linn.). 



Augasma aeratella Zell.: Bud greatly hypertrophied. 



Fine, Scotch {Pinus sylvestris Linn.). 



Laspeyresia cosmopkorana Tr.: Resinous swelling in the 

 bark of a branch. 



Dioryctria splendideUa H. S. : Lumps of resinous exuda- 

 tion in a branch. 



Rhyacionia resinella Linn.: Globular mass of resinous 

 exudation at the apex of a twig. 



Plantain, Ribwort {Plantago lanceolata Linn.). 



Tortrix pahana Herb.: Flower spike swollen and de- 

 formed. 



Oak {Quercus robur Linn.). 



Pammene splendidulana Gu6n6e : Young branches swollen. 



Stenolechia gemmella Linn. : Extremity of a branch in- 

 curved and swollen. 



Heliozela stanneella Fisch. V. R. : Midrib and petiole 

 swollen. 



Poplar, Black (Populus nigra Linn.). 



