xii LIST OF ILLUSTRATIONS. 



FIG> PAGE 



24. Right hind-leg of Halictus (after Miiller) . . 20 



25. Left hind-leg of Panurgus banksianus ,, ,, . 21 



26. Right hind-leg of A nthophora bimaculata ,, ,. . .21 



27. Right hind-leg of Bombus scrimshiranus ,, ,, . . 22 



28. Right hind-leg of Hive-bee ,, . 2 2 



29. Diagrammatic section of Arum 22 



30. Pink in the first (male condition) -r 



31. Pink in the second condition, with mature stigmas . . 35 



32. Thymus serpylhim, in the first condition, with ripe stamens 



(after Miiller) 3 g 



33. Thymus serpyllum, in the second condition, with mature 



stigma. . 36 



34. Myosotis versicolor, young flower (from Nature) ... 36 



35. Myosotis versicolor (older flower) 36 



36. Cleistogamous flower of Lamium amplexicanle (after Hilde- 



brand) 37 



37. Section of ditto (after Hildebra^d) 37 



38. Primula (long-styled form) 38 



39. Primula (short-styled form) 38 



40. Geranium pratense (after Bentham) 41 



41. Geranium pratense, young flower (after Hildebrand) . . 42 



42. Geranium pratense (older flower) ,, ,, . .42 



43. Maiva sylvestris (after Sower by; 45 



44. Malva rotundifolia ,, 45 



45. Stamens and stigmas of Malva sylvestris (after Miiller) . 46 



46. Stamens and stigmas of Malva rotundifolia ,, ,, .46 



47. Epilobium angustifoliiim (after Sowerby) .... 47 



48. Epilobium parviflorum ,, ,, . . . .47 



49. Corolla of a, Geranium pratense ; b, G. pyrenaicum ; c, G. 



molle ; d, G.pusillum 48 



50. Lychms vespertina (after Bentham) 50 



51. A young flower of Delphinium elatum, seen from in front, and 



after removal of the calyx (after Miiller) 57 



52. Section of the same flower seen from the side ,, 57 



53. An older flower, seen from front, after removing calyx ,, ,, 57 



54. Section of the same flower, seen from the side ,, ,, 57 



55. Flower seen from above ,, ,, eg 



56. Pistil with two stamens, after the visit of an insect ,, ,, 59 



57. Section of a flower of Viola canina 65 



58. Stamen of a flower o f Viola canina 5 



