140 FERTILIZATION OF SPRING FLOWERS ON THE YORKSHIRE COAST. 



Lathiea squamaria L. — No visitors seen. 



sb., '96. 



Bombus agrorum F 

 Tbrips sp., '95. 

 Bombus agrorum F., sb., 

 Ds. : Lucilia cornicina F. 



b., '95. 



-Hm. : Andrena cbirkella K., $ 



'96. 

 fp., 



*Nepeta Glechoma Bentb. — ^Hl. 

 C. : Meligetbes sp., sb., '95. T. : 



"•'Laimium purpureum L.— hi. 

 L. : Vanessa urticte L., sb., '95. 

 '95 ; Sepsis nigripes Mg., seeking 



Narcissus Pseudo-narcissus L. 

 seeking b., but unable to reacb it, '95. Dm. : Eristabs pertinax 

 Scop, (in a garden), seeking b.?, '96. Ds. : Pborbia muscariaMg., 

 aimlessly seeking b. in every part of tbe flower, in doing wbicb 

 it probably would sometimes self-fertilize tbe flower, '95 ; anotber 

 fly, seeking b., '95. T. : Tbrips sp., '95, '96. Acarina: 1 sp. 

 wandering in tbe flower, '96. 



[To Viola arrensis Murr., Vacciniuin Mijrtillus L., Lamiuni am- 

 plexicaule L. (only cleistogaraic), — no visitors. Garden competitor : — 

 tiyacinthus orientalis. — HI.: Apis mellifica L., sb., '96; Bombus 

 terrestris L., sb., '96. L. : Vanessa urticse L., sb., '96.] 



Class VIII. (F.) Butterfly-flowers iiar excellence. 



Primula vulgaris Huds. — Hm. : Andrena gwynana K., 5 , 

 seeking b., '95, '96, but quite unable to reacb it. C. : Meligetbes 

 picipes Sturm, sb., '96; Euspalerum primulse Stepb., devouring 

 antbers, '96. T. : Tbrips sp., '95, '96, extremely abundant. 



' Lxjchnis dinrna Sibtb. — No visitors. Garden competitor : — 

 Crocus spp. — H. : Apis mellifica L., sb. and cp.; it appears to be 

 just able to reacb tbe surface of tbe boney by a great effort. '95, '96. 



Summing up tbe number of species of insects visiting tbe 

 various species of plants witbiu tbe same class, we get tbe following 

 table :— 



Table II. — Distribution of Species of Insects among the 

 Classes of Flowers. 



If from tbis table tbe percentages of tbe groups of insects visiting 

 eacb flower-class be calculated, it will be seen tbat tbe long-tongued 

 bees associate tbemselves mostly witb Class H, wbere tbey make 

 25 per cent, of tbe visitors, and tbat tbey associate less witb tbe 

 others, in the case of Class AB making only 4-5 per cent, of tbe 



