Bramble-bees and Others 



the bottommost, have as the respective dis- 

 stances between their partitions, in milli- 

 metres : 



II, 12, i6, 13, 11/ 



The five upper ones measure between their 

 partitions : 



7> 7. 5» 6, 7.^ 



A reed-stump 1 1 millimetres^ across the in- 

 side contains fifteen cells; and the respective 

 distances between the partitions of those cells, 

 starting from the bottom, are: 



13, 12, 12, 9, 9, II, 8, 8, 7, 7, 7, 6, 6, 6, 7/ 



When the diameter of the tunnel is less, the 

 partitions can be still farther apart, though 

 they retain the general characteristic of being 

 closer to one another the nearer they are to 

 the orifice. A reed of 5 millimetres^ in dia- 

 meter, gives me the following distances, al- 

 ways starting from the bottom: 



22, 22, 20, 20, 12, 14.^ 



1.429, .468, .624, .507, .429 inch. — Translator's Note. 

 2.273, .273, .195, .234, .273 inch. — Translator's Note. 

 2.429 inch. — Translator's Note. 



4.507, .468, .468, .351, .351. 429. -312, .312, .273, .273, 

 .273, .234, .234, .234, .273 inch. — Translator's Note. 

 "5.195 inch. — Translator's Note. 

 6.858, ,858, .78, .78, .468, .546 inch.— Translator's Note. 



80 



