THE BREEDING OF INSECTS. 



329 



FIG. 288. 



the insects to be bred 

 is planted in the flow- 

 er-pot ; in other cases 

 a bottle or tin can 

 filled with wet sand is 

 sunk into the soil in 

 the flower - pot, and 

 the stems of the plant 

 are stuck into this wet 

 sand. The top of the 

 lantern-globe is cov- 

 ered with Swiss mus- 

 lin. These breeding 



FIG. 289. 



cages are inexpensive, and especially so when the 

 pots and globes are bought in considerable quanti- 

 ties. Fig. 290 represents a 

 modification of this style of 

 breeding cage that is used 

 by the writer. It differs 

 only in that large glass cyl- 

 inders take the place of the 

 lantern-globes. These cylin- 

 ders were made especially 

 for us by a manufacturer of 

 glass, and cost from six dol- 

 lars to eight dollars per doz- 

 en, according to size, when 

 made in lots of fifty. 



When the transforma- 

 tions of small insects or of a 

 small number of larger ones 

 are to be studied, a conven- 

 ient cage can be made by 



FIG. 290. 



