Livingstones Travels And Researches in South Africa Including a Sketch of Six
Livingstones Travels And Researches in South Africa Including a Sketch of Six
Livingstone David
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The natives say that if a drop falls into the eyes it causes inflammation of these organs. To the question, wdience is this fluid derived, the people reply that the insects suck it out of the tree; and our own natu- ralists give the same answer. I have never seen an orifice, and it is scarcely possible that the tree can yield so much. A similar but much smaller homopterous insect, of the family Cercopidce, is known in England as the frog-hopper, (Aphrophora spumaria, ) when full grown and furni...shed wath wings, but while still in the pupa state it is called " Cuckoo-spit, " from the mass of froth in which it envelops itself. The circulation of sap in plants in our climate, especially of the graminacesB, is not quick enough to yield much moisture. The African species is five or six times the size of the English. In the case of branches of the fig-tree, the point the insects congregate on is soon marked by a number of incipient roots, such as are thrown out when a cutting is inserted in the ground for the purpose of starting another tree.
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