PLATE XYIIL— continued. 



Fig. 5. — End of the female pygofer of L. Reijiy. 

 much enlarged, and viewed in profile, c. The caiida. 

 Two strong and sharp hooks at s, point downwards, 

 and appear to be opposed to the comparatively small 

 saw and its appendages below (part of the sheath). A 

 double ligament (/) is attached to the edge of the 

 somite. The cauda and the hooks are capable of 

 retraction within the anal ring, which last is seen in 

 perspective. Bleached in acid. 



Fig. 6. — Antenna of Lihnmia Reyi much enlarged. 

 The two basal joints are cylindrical. The setiform 

 termination springs from a bulb (t). The second joint, 

 like that of many other Delphacids, is furnished with 

 fossae or pits (/), each of which has a fine membrane 

 stretched over the mouth. These doubtless act in the 

 same manner as I have before shown they do in the 

 antennae of some Aphides. Probably these membranes 

 are in connection with the nerve fibres within, and 

 vibrate to external sounds. 



See 'Monograph of British Aphides,' Piay Society. 



