INSECT BREEDING. 177 



GLASS CYLINDERS FOR REARING LEPIDOPTERA. 



For two or three years past I have been very 

 successful in rearmg a great many Lepidoptera 

 from the egg (more especially the Geometrse), 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 hoh 



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 

 sufiicient force to make a small hole, which must 

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



1 Brass eyelets with rings are obtained at Barton and 

 Sons, 48, Goodge Street, Tottenham Court Road, 



