304 



FIRST LESSONS IN ZOOLOGY 



inclosed broad shallow tunnel, covered above with glass, 

 connecting" the two openings. Over the glass top of the 

 tunnel lay a sheet of dark cardboard, which can be 

 simply lifted off whenever it is desired to see what is 

 going on at the entrance. Here can be seen the " ven- 

 tilatins/," the alertness of the sentinels and ""uards, the 

 killing of drones, the constant arrival of pollen-laden 

 food-gatherers, etc. 



But observations may well begin in the field (fig. 241 j. 

 Note the gathering of flower pollen. Where does the bee 



Vh:. 241. — IIiiiiry-l)ei_-s i^Mtliering polK 



1 nectar. (From life.) 



put the pollen as it collects it.'' Why doesn't the pollen 

 fall olf.? Kill a bee in a killing-bottle and examine care- 

 fully one of its hind legs. Make a drawing showing the 

 pollen basket. At the flowers some of the bees do not 

 collect pollen but nectar. Where do the)' find it, and 

 \m<w do the)' collect and carry it.' Examine the complex 

 ' ' tongue " of a dead bee. V>y means of this tongue nec- 

 tar is sucked or lapped up and swallowed into a crop, 

 where it is not digested but retained until the lice returns 

 to the hive. By observing the bees there and examining 



