8 THE AMERICAN NATURALIST. . (Vor. XXXIX. 
3, à) were stimulated by touching them with the point of a small 
artist's brush, or head of an insect pin, it gave rise to a respon- 
sive movement of the wing of the opposite side of the body. 
The same stimulus applied to both sides at the same time 
caused both wings to move or jerk simultaneously. 
From these simple experiments I am led to infer that the 
motions of the wings witnessed during the sexual performances 
previously described are automatic in nature. They are caused 





Drawn by the author. 
by the female palpi touching the sensitive hairs above alluded. 
to, during the time she is drinking. 
When examining the male, one may often find, when raising 
the tegmina, a small plasmatic yellow droplet of the glandular 
secretion on the under side of the lower tegmina, opposite the 
position of the gland. This is an excessive fluid secreted from 
the glandular hairs. The gland fossa is often found filled 
