156 MORPHOLOGY OF INVERTEBRATE TYPES 



legs, mesosternum, mesothoracic legs and wings, metasternum, 

 metathoracic legs and wings, first to eighth abdominal sternites. 

 In the male the ninth sternite with the terminal subgenital 

 plate attached to it and the cerci; in the female the ventral 

 division of the ovipositor. 



3. Make a drawing showing the left side view of the abdomen 

 of a female from the division line between the seventh and eighth 

 segments backwards. Label eighth, ninth, tenth and eleventh 

 tergites, eighth sternite, cerci, podical plates and the three 

 left divisions of the ovipositor (dorsal, ventral and egg-guide). 



4. With the aid of a forceps remove the upper lip or labrum, 

 both mandibles, both maxillae, under lip or labium and hypo- 

 pharynx. Place them in their natural sequence and make a 

 drawing showing all parts. Label on the maxillae cardo or first 

 joint of protopodite, stipes or second joint of protopodite, lacinia 

 or inner maxillary plate, galea or outer maxillary plate and the 

 five-jointed maxillary palpi. On the labium label submentum, 

 mentum, ligula, and four-jointed labial palpi. 



5. Make a drawing showing the side view of the meta thorax 

 and first and second abdominal somites with wings raised to 

 expose the auditory organ. 



6. Cut out with sharp scissors the left auditory organ together 

 with a piece of adjoining integument, remove all adhering tracheal 

 tubes, wash and examine its inner surface in water through the 

 dissecting microscope. Make a drawing showing the thickened 

 edge of the organ, the tympanum or membrane, the auditory 

 nerve, the ganglion. 



7. Female. With the aid of fine scissors make an incision 

 along the ventral surface of the animal parallel to and slightly to 

 the left of the mid- ventral line. The incision should extend from 

 the ovipositor to the head. Make a similar incision parallel 

 to and slightly to the left of the mid-dorsal line, and remove the 

 left body wall. Remove in the same way the left side of the head 

 capsule. Make a drawing showing the organs in situ. Label (i) 

 alimentary canal in which the following parts may be recognized: 



