358 NATURAL HISTORY OF AQUATIC INSECTS CH. 



The tail is not brought to the surface, but the air 

 passes directly into the thoracic spiracles. In cold 

 weather Corixa, like other aquatic Rhynchota, buries 

 itself in the mud at the bottom of a pool, and is often 

 smeared with mud when it reappears in early spring.^ 



Fig. iio. — Corixa GeofTroyi. 



Schmidt-Schwedt says that Corixa uses its fore-legs 

 to play a tunc upon the snout. Captive specimens 

 were observed to utter a tolerably loud and sustained 

 note of an evening. The Insects were at such times 

 submerged. He observed that the note was produced 

 simultaneously with the movement of the fore-leg. 



^ Douglas, Ent. Mon. 



Mag.,\o\. III. 



p. 25. 



