NEUROPTERA 89 



7. Arrange sand boxes in which these living larvae may 

 construct new pitfalls. 



8. Collect, cage and keep ants for food for these living 

 larvae. 



9. Collect orl flies when they swarm by the waterside. 



10. Collect orl fly larvae from sandy shores by sifting with 

 a sieve net. 



11. Arrange dishes of sand in water for keeping them alive 

 indoors. 



12. Pin, mount and label a representative lot of Neurop- 

 tera for the collection. 



13. Make slide mounts of an aphis lion's head and feet. 



14. Routine (see p. 204). 



LA BORA TOR Y PROGRA M 

 A. The Study of Living Specimens. 



1. Place lace-wing larva that has been kept without food 

 for several hours in the midst 



of a colony of living aphids 

 and watch its procedure with 

 them. 



2. If cocoons containing 



living: pUDae are at hand, and Fig. 33.— An ant-lion pitfall in the sand, and 

 r r an ant near it. 



if chance offers, watch a pupa 



emerge and clamber upon a leaf and select a place to attach 



itself firmly and transform.^ 



3. Drop a live ant into a pitfall containing a living ant- 

 lion and watch the result. See the ant-lion try to seize the 



