INSECTS AND VERMES. 263 



shrill notes, as it were for a signal to their 

 fellows, that they may escape to their cran- 

 nies and lurking holes, to avoid danger. 



White. 



CIMEX LINEARIS. 



August 12, 1775. Cimices lineares are 

 now in high copulation on ponds and 

 pools. The females, who vastly exceed the 

 males in bulk, dart and shoot along on the 

 surface of the water with the males on their 

 backs. When a female chooses to be dis- 

 engaged, she rears, and jumps, and 

 plunges, like an unruly colt; the lover 

 thus dismounted, soon finds a new mate. 

 The females, as fast as their curiosities are 

 satisfied, retire to another part of the lake, 

 perhaps to deposit their foetus in quiet ; 

 hence the sexes are found separate, except 

 where generation is going on. From the 

 multitude of minute young of all gradations 

 of sizes, these insects seem without doubt 

 to be viviparous. White. 



