74 Miscellaneous. 



vegetation. I may add, that not only the study of the latter insects, 

 but also a knowledge of plants and of their dependence on soil and 

 climate, is requisite as a preliminary to the examination of parasitic 

 insects. 



Detomyia Boleti, Kalt. Lives in Boletus (Polyporus) igniarius, the 

 hard tinder boletus. 



Mycetobia pallipes. Lives in the sap of Ulmus campestris, the com- 

 mon elm. 



Ctenophora 2-maculata, Meig. Lives in the old wood of Carpinus 

 Betulus, the hornbeam. 



nigricornis, Meig. Lives in the old wood of Quercus Robur, the 



oak. 



Lasioptera argyrosticta, Meig. Lives in the galls on the stem of 

 Rubus vulgaris, the bramble. (Eurytoma rufipes has been reared 

 from the galls of this plant, and is probably a parasite of Lasi- 

 optera argyrosticta.) 



Cecidomyia Galeobdolontis , Kalt. Lives in the knobs by the roots of 

 Galeobdolon luteum, yellow dead-nettle. 



Brassica. Lives in Brassica Rapa, the turnip. 



Spartii, Kalt. Lives in the knobs of the deformed flower of 



Spartium, the broom. 



Stachydis, Kalt. Lives in the top leaves of Stachys splvatica, 



the hedge-nettle. 



Spireee. Lives in the galls on the leaves of Spireea Ulmaria, 



the meadow-sweet. 

 Cardui. Lives in the receptacle of Carduus and of Cirsium, the 



thistle. 

 Hieracii, Kalt. Lives in the receptacle of Hieracium Pilosella, 



the mouse-ear hawkweed. 

 Nepetce, Kalt. Lives in the top leaves of Nepeta Cataria, cat- 



mint. 



— Bryonia, Kalt. Lives in the top leaves of Bryonia, bryony. 



— Aceris. Lives in the galls of Acer pseudo-platanus, the syca- 

 more. 



Medicaginis, Kalt. Lives in the knobs of the deformed flower 



of Medicago falcata, yellow medick. 



— Polygoni, Kalt. Lives in the leaves of Polygonum atnphibium, 

 spotted persicaria. * 



— Rumicis, Kalt. Lives in Rumex obtusifolius, the broad-leaved 



dock. 



Veronica, Meig. Lives in the leaves of Veronica Chamadrys, 



germander. 



— Ptarmica, Kalt. Lives in the flowers of Achillea Ptarmica, 

 sneezewort. 



UrticcB, Winnertz. Lives in the galls on the leaves of Urtica 



dioica, the nettle. 

 — Pini, Ratzb. Lives on the leaves of Pinus sylvestris, Scotch pine. 

 Poce, Kalt. Lives in the galls on the culms of Poa nemoralis, 



wood meadow-grass. 

 — Salicis. Lives in the top leaves of the twigs of Salix alba, 

 common white willow. 



