SIDE-SADDLE FLOWERS. 



paired ; and to answer this the same careful observer 

 narrated his experience as to how the flies are 

 entrapped. "The nectar being found below the lower 

 lip for half an inch or more, when the fly is satiated, 

 and makes for flight, he must do so immediately 

 upward for a very short distance, and then somewhat 

 at right angles, to get through the outlet — a rather 

 difficult flight, which perhaps of all insects only a 

 fly might be capable of, but which even he probably 

 is not. This, too, upon the supposition that his head 

 is upward, whereas his head is, I believe, generally 

 downward, or at least parallel with the lip. If in 

 the first position he attempts flight, he is very apt 

 to strike the arch overhead, and, if he escapes that, it 

 is next to an impossibility for him to turn and strike 

 that small space between the projecting (and down- 

 ward projecting) lid and the lower lip. If with head 

 downward, he is very apt in flight to strike the op- 

 posite wall at a still lower angle, and then, from 

 rebound to rebound, get lower and lower until he 

 touches the pool. In almost every instance, there- 

 fore, a fly once entering is caught." 



The next point for inquiry refers to the fluid 

 contained at the bottom of the tubes or pitchers. 

 What is this fluid which is almost universally present, 

 and what its purpose ? Dr. Millichamp says :— "The 

 first point to decide seemed to be whether the 

 watery fluid found in the leaves was a true secretion 



