...minutes at a group of these insects while feeding on thebark of the Willow, oneperceives a few of them elevate their bodies and a transparent substance evidently...which is immediately followed by a similar motion and discharge like a small shower from a great number of others. At first I was not aware that the substance...

...group of these in" sects, while feeding on the bark of " the willow, one perceives a few of " them k WG '^k, ] , ; 8 ;# ; { ԑS s >9 B m 57 X A im" mediately followed by a similar " motion and discharge, like a small *' shower, from a great number...

...minutes on a group of these insects, while feeding on the bark of the willow, one perceives a few of them elevate their bodies, and a transparent substance...which is immediately followed by a similar motion and discharge, like a small shower, from a great number of others. At first, 1 was not aware that the substance...

...minutes on a group of these insects, while feeding on the bark of the willow, one perceives a few of them elevate their bodies, and a transparent substance...which is immediately followed by a similar motion and discharge, like a small shower, from a great number of others. At first, I was not aware that the substance...

...willow, a few of them will be perceived to elevate their bodies, arid a transparent substance will evidently drop from them ; which is immediately followed...from a great number of others. On placing a piece of writing-paper under a mass of these insects, it soon became thickly spotted; holding it a longer time,...