PLATE VII 



Figure 1. The head and mouth parts of Citlex fatigans, in side 

 view, x 43 



Figure 2. The distal end of the maxilla of same. Very highly 

 magnified. 



Figure 3. The distal end of the mandible of same. Very highly 

 magnified. 



Figure 4. A cross section of the labium of same, showing the 

 mouth parts in the resting position, l.g., the labial 

 gutter, connected to the mentum by the membrane, 

 mb. ha., haematocoelic space, always exaggerated in 

 sections on account of the shrinkage of the parts. The 

 space is in continuity with the haematocoele of the 

 head and body, hy.c., hypodermal cells, mu., the 

 longitudinal muscle of the labium, which functions in 

 retracting it when the piercing stylets enter the wound. 

 The labium is bent very much as a bow is bent when 

 the bowstring is tightened. X 1000. 



Figure 5. The mandible and maxilla of same dissected out in a 

 cleared preparation. The mandible is separated from 

 its attachment, x 170. 



