FERTILIZATION OF SPRING FLOWERS ON THE YORKSHIRE COAST. 97 



Lonclioptera sp., '95 ; Exechia sp., '95. T. : Thrips sp., '95. 

 CoUembola : Lepidocyrtus sp., '95, '96. All the above at honey. 

 Araneida : 1 sp., lying in wait. 



Chnjsosplenium alternifolium L. — Ds. : Cecidomyia sp. ? and 3 

 other small flies, '95. C. : Tachyporus chrysomeliuus L., '95 ; 

 Lathrimaeum atrocephalum GylL, '95. Hem. : 1 sp., '95. All sh. 



'■'Adoxa Moschatellina L. — Hs. : Pezomachus sp., '95 ; another 

 small ichneumon, '95. Dm. : Melanostoma quadrimaculatum Ver- 

 rall, '95. Ds. : Scatophaga stercoraria L., '95 ; Sepsis nigripes 

 Mg., '95 ; Sciarasp., '95, '96 ; Exechia sp., '95 ; Rhyphus sp., '95; 

 and 3 other species, '95, '96. C. : Apion fagi K., '95. T. : Thrips 

 sp., '95. All at honey. 



*Salix Caprea L. (including S. cinerea L.) — To <? catkins : — 

 HI. : Apis mellifica L., '96 ; Bombus terrestris L., sh. and cp., 

 '96, frequent. Hm. : Andrena gwynana K., cp., '96. L. : Vanessa 

 urticfe L., sh., '96. Dm.. : Eristalis pertinax Scop., sh., '96 ; 

 Melanostoma quadrimaculatum Verrall, '96. Ds. : Lucilia corni- 

 cina F., '96; Pollenia rudis F., '96; Scatophaga stercoraria L., '96. 

 To 5 catkins: — HI.: Apis mellifica L., '95; Bombus hortorum L., 

 '95 ; B. terrestris L., '96. Hm. : Andrena clarkella K., <? , '95. 

 Dm. : Eristalis pertinax Scop., '96 ; Melanostoma quadrimaculatum 

 Verrall, '95 ; Empis sp., '96. Ds. : Calliphora erythrocephala Mg., 

 '95 ; Pollenia rudis F., '95. ; Sepsis nigripes Mg., '95 ; another 

 small fly, '96. All at honey. Acarina : a small acarid running 

 upon the catkins, '95, To catkins bearing both S" and ? flowers 

 with transitions: — HI.: Bombus hortorum L., '95. Hm. : Andrena 

 gwynana K., ? , '95. Hs. : ichneumon, 1 sp., '95. L. : Vanessa 

 urticae L., '95. Dm. : Melanostoma quadrimaculatum Verrall, '95. 

 Ds. : Lucilia cornicina F., '95; Lasiops sp.?, '95; Phorbia mus- 

 caria Mg., '95; Phorbia sp., '95; Actora aestuum Mg., '95; Sca- 

 topse notata L., '95. All at honey. 



*Salix aurita L. — Only observed in '96. To t? catkins : — HI. : 

 Apis mellifica L., sh., very abundant; Bombus terrestris L., sh. ; 

 B. agrorum F., sh. Hm. : Andrena gwynana K., sh. and cp. ; A. 

 clarkella K. Dm. : Eristalis arbustorum L. Ds. : Scatophaga sterco- 

 rariaL.,sh.; Lasiops sp., fp. To ? catkins: — HI.: Apis mellifica L., 

 sh.; Bombus terrestris L., ? sh. Dm. : Melanostoma quadrimacu- 

 latum Verrall, sh. Ds. : Scatophaga stercoraria L., sh. ; Lasiops sp. 

 Salix viMiNALis L. — To $ catkins :— Hm.. : Andrena clarkella K., 

 (? , '95. Hs. : an ichneumon, '96. Dm. : Syrphus lasiophthalmus 

 Ztt., '95; Melanostoma quadrimaculatum Verrall, '95. Ds. : Calli- 

 phora cognata Mg., '95. Scatophaga stercoraria L., '95, '96; Helo- 

 niyza sp., '95 ; Lasiops sp., '95 ; Tephrochlamys rufiventris Mg., '95 ; 

 Hylemyiasp., '95; Rhyphus fenestralis Scop., '95 ; Actora jestuum 

 Mg., '95; Simulium sp., '95; another species, '95, '96. Hem.: 

 1 sp., '95. All the above, except Simulium, at honey. 



*Salix purpurea L. — To <? catkins : — Hm. : Andrena gwynana 

 K., ?,'95,'96. Dm.: Eristalis pertinax Scop., '96 ; Melanostoma 

 quadrimaculatum Verrall, '95. Ds. : Scatophaga stercoraria L., 

 sh., '95, '96 ; Limnophora septemnotata Ztt., '95 ; Phorbia sp., '96; 

 Actora aestuum Mg., '95 ; Sepsis nigripes Mg., '96 ; Hylemyia sp., 

 Journal of Botany. — Vol. 35. [jNIarch, 1897.] h 



