INSECT BREEDING. 177 



GLASS CYLINDERS FOR REARING LEPIDOPTERA. 



For two or three years past I have been very 

 successful in rearing a great many Lepidoptera 

 from the egg (more especially the Geornetrse), by 

 means of glass cylinders. The system not only 

 shows a good result as regards the number of 

 specimens bred, but also affords abundant oppor- 

 tunity for observing the various habits of the 

 larvae. The apparatus is made as follows : 



First procure a saucer (the largest that can be 

 obtained), through the centre of which a hole 



Fig. 1. 



A (shaded lines). The saucer. 



B. Rim of saucer, over which calico is stretched and pasted at F. 



C. Calico stretched from edge of saucer (B) to eyelet (D). 



D. Eyelet fastening down the calico. 



E. Hole in saucer. 



must be made. This may easily be done by 

 placing the saucer, inverted, on some soft sub- 

 stance (a pillow for instance), and striking it 

 sharply with the point of some instrument with 

 sufficient force to make a small hole, which must 

 then be enlarged so as to admit of a brass eyelet. 1 



1 Brass eyelets with rings are obtained at Barton and 

 Sons, 48, Goodge Street, Tottenham Court Road. 

 N 



