1913] Anatomy of the Squash Bug. 437 



EXPLANATION OF PLAJTES. 



Plate LV. 

 Lateral view of head, thorax and first segments of the abdomen. 

 Cross section of the mandibular and maxillary setas. 

 Lateral view of a tarsal claw and the adhesive pad or modified pulvillus 



lying beneath it. 

 Lateral view of the meso- and metathorax, as seen looking obliquely 



backward, the prothorax being removed and the wings raised and 



the abdomen abnormally extended to show the spiracle on the 



first segment. 

 Fig. 5. Dorsal view of the abdomen. The female genitalia are not extended. 



Plate LVL 

 Fig. 6. Maxillary setae showing fluted and piercing tips; (see fig. 2 cross section 

 of maxillary setae). 

 Mandibular setae showing barbed and piercing tips. 

 Cross section of labium at the tip showing how the setae are supported. 

 Coxa and trochantin. 



Dorsal view of the meso- and metathorax with the wings extended. 

 Lateral view of the male genitalia extended. 

 Ventral view of the male genitalia normally retracted. 

 Typical leg. 

 Lateral view of female genitalia normally retracted. 



Pl.\te LVIL 

 Dorsal view of male genitalia extended. 

 Antenna. 



Ventral view of the insect showing female genitalia. 

 Lateral view of female genitalia extended. 



PL.ATE LVIIL 



Fig. 19. Fore wing. 



Fig. 20. Hind wing. 



Figs. 21-24. More or less diagrammatic. 



Fig. 21. Cross section of second segment of the labium, showing the position of 

 the setae. 



Fig. 22. Cross section at the tip of the first segment of the labium, showing the 

 position of the setas. 



Fig. 23. Cross section at about the middle of the first segment of the labium, 

 showing the position of the setae.' 



Fig. 24. Cross section at the base of the labrum, showing how the setae are sup- 

 ported. 



