134 Life and [mimortahty. 
PSEUDARGIOLUS BUTTERFLY. 
Larva Feeding on Bud os Black Snakeroot, and Guarded by Ants. 
Four species of ants may be seen attending, not the small 
larve, but those that have attained the nearly mature condi- 
tion. They are invariably found on or near the larva. Their 
actions, as they run over the body, caressing with antenna, 
evidently persuading the larva to emit a drop of the fluid, 
are alike curious and interesting. Most of this caressing is 
done about the anterior segments, and while the ants are 
thus occupied, or rather, while they are absent from the last 
segments, the tubes of the twelfth seem expanded to their 
full extent, and so remain, without retracting or throbbing, 
until the ants come hurrying along with great excitement 
and set foot or antenna directly on or close by the tubes, 
