40 



HERPETOLOGY OF MICHIGAN. 



poisonous if taken internally. The latter affects the mucous mem- 

 brane of the mouth and protects the toad Avhen seized by dogs 

 and other enemies. 



The breeding seasou lasts from April to July. The first specimen 

 observed by the writers in 1911 was found on the evening of April 



DOMINION OF CANADA 



I L L I N IS 



Fig. 10. Distribution of Biifo americanus. 

 Horizontal ruling, specimens examined; vertical ruling, reports only. 



26, and the next dav lar^e numbers were seen on their Avav to the 

 ponds. The males seem to outnumber the females and struggle to- 

 gether for their possession. A^'hell disturbed. I lie male utters a 

 peculiar chirping sound somewhat like the scolding of a chicken. 

 The souiLi' consists of a sweet high trill that is bird-like in its quality. 



