134 ELEMENTARY LESSONS ON INSECTS 



the mouthparts out at its tip. This Mecopterous beak is a 

 half-and-half combination of the two plans of beak forma- 

 tion: above, the front of the head is prolonged, carrying 

 labrum and mandibles out to the tip; below, tjie basal parts 

 of maxillae and labium are prolonged, themselves forming 

 the lower half of the beak. 



It is the curving, upturned, pincherlike tail of the male of 

 Panorpa that has given the group its common name. 



LESSON 13 



Other Orders of Insects 

 WORK PROGRAM 



1. Collect insects of any of the above mentioned smaller 

 orders, wherever they may be available. 



2. If dried specimens are to be used in the laboratory, 

 give them an overnight stay in a relaxing jar. 



3. Make slide mounts wherever these are needed to clearly 

 expose the structure of mouthparts, legs or wings. 



4. Pin, mount and label specimens for the collection. 



5. Home problems on crop pests (see p. 174). 



6. Routine (see p. 204). 



LA BORA TOR Y PROGRA M 



The study of living and of preserved specimens will have 

 to be adapted by the teacher to the materials available. 



