SENSORY ADAPTATIONS OF BATS. 



171 



There are, however, compHcating factors which make the in- 

 terpretation of the results somewhat difficult since the exact way 

 in which the ears are affected is not known. A male M. hicifu- 

 giis used on July i 5 seemed to be able to equilibrate perfectly 

 but it flew with a heavy, uncertain flight and was never observed 

 to dodge an object. When it came in contact with any object to 

 which it could secure hold with its claws it clung to it, but always 

 alighted in the position in which it happened to strike instead of 

 reversing in the air and alighting head down. Another bat was 

 able to right itself when tossed end over end into the air but it 

 was never seen to dodge and it struck the wires on 66 per cent, 

 of the trials. Others acted in a similar manner. 



Table II. 



Avoidance of Wires. 



Myotis subulatus. 



It is difficult to calculate exactly the number of probable strikes 

 if there were no avoidance because the wires were unequally 

 spaced and because the distance between the tip of the wings is 



' Hair covered. 



' Ears and tragi removed first. 



