HANCOCK 



17 



down below the female's and to one side, he turns up the end 

 so that it affixes the subgenital plate by its anterior border, as 

 we have described, to the process of the last sternum below her 

 ovipositor, fastening it securely in position. Now he rides 

 with impunity about on her back out of her reach. At this 

 time his hind legs are usually drawn up out of the way, taking 

 no part in grasping her body. The female becomes, after a 

 time, resigned to the male's presence and goes about as usual. 

 The male, unwilling to leave his position, often takes food 

 while still clinging to her back. 



TETTIGIAN SPERMATOZOA. 



The spermatozoa are found in multitudes as hair-like bodies 

 in two whitish glands at the extremity within the male abdo- 

 men. When these glands are opened at the proper time 



Fig. 4. Spermatozoon of Tettigidca parvipennis. A, dorsal and lateral 

 aspect of body: a, cephalic segment; (^, mesosegment; f, caudal 

 segment. B, Paratetti.x CKCitllatiis, the different parts designated 

 as in preceding figure. 



under favorable conditions with a needle, the spermatozoa, 

 which are not motile at first, upon exposure to a warmed 

 saline solution exhibit remarkable movements. In Tctti- 



