MANUAI, OF NATURB STUDY. 147 



and give a few lessons on the bee and its apparatus 

 peculiarly adapted for carrying pollen. Have the 

 children examine with a good hand lens the third 

 leg of the bee. The first tarsal joint bears regular 

 rows of stiff straight hairs, on which the pollen 

 grains are collected. The stickier and heavier the 

 pollen the better will it adhere to the bee. Corn- 

 stock says of the bee: " The worker is our common 

 acquaintance, the dull-black and gold-colored com- 

 panion of our walks, that we watch with interest 

 as she ransacks the flowers of a garden or a way- 

 side for her booty of nectar or pollen, now bending 

 low a violet or clover blossom, now plunging 

 headforemost into a hollyhock or lily, from which 

 she emerges dusty with the gold of pollen doors 

 which barred her way to nectar chambers." — 

 Comstock's Manual for the Study of Insects^ pf^gs 

 674. 



Returning to the flowers, is there anything 

 about the shape and arrangement of the violet 

 flower that injures its chances for self-fertilization ? 

 Is the pollen suitable for wind-fertilization ? 

 Why? Do these hindrances to self-fertilization 

 and wind-fertilization become helpful to insect-ferti- 

 lization ? How ? Study bleeding heart, columbine, 

 larkspur, lily of the valley, snap dragon, horse- 

 chestnut, lilac, white clover, red clover, milk weed, 

 pea, bean, locust and wistaria in same way. The 



