. Ants; their structure, development and behavior. FIG. 171. Tococa formicaria, from a specimen in the herbarium of the New York Botanical Garden. (Original.) Lcca and Pterospermum, which possess these glands, are described as free from ants. Both the food bodies and the Perldriisen are uliviously modified glands, and differ from the nectaries much as certain animal structures, like the milk glands, in which the cells them- 302 .INTS. selves break down to form the secretion, differ from the salivaryglands which secrete a liquid without undergoing disintegration. 5. Pith and Other Vegetable Tis
. Ants; their structure, development and behavior. FIG. 171. Tococa formicaria, from a specimen in the herbarium of the New York Botanical Garden. (Original.) Lcca and Pterospermum, which possess these glands, are described as free from ants. Both the food bodies and the Perldriisen are uliviously modified glands, and differ from the nectaries much as certain animal structures, like the milk glands, in which the cells them- 302 .INTS. selves break down to form the secretion, differ from the salivaryglands which secrete a liquid without undergoing disintegration. 5. Pith and Other Vegetable Tissues.—Dahl (1901) describes cer-tain ants of the Uismarck archipelago and their larvae as feeding on. FIG. 172. Cecropia adenopus (Schimper.) A, Tip of branch with leaves cut off;t, trichilia at base of leaf petioles ; x. prostoma or depression in internode ; .r. stoinaor opening to hollow internode made by Azteca muelleri at the prostoma. B, Lon-gitudinal section of stem showing the hollow internodes and at (.v) the septa per-forated by the ants. the pith in the twigs of Clerodendron, and von Ihering (1907) findsthat Azteca muelleri eats the tissue that grows over the perforationthrough which it enters the hollow twigs of the Cecropia. There is,of course, no myrmecophilous adaptation on the part of the plants inthese cases. Turning now to the ants which are supposed to take advantage ofthe inducements offered by the plants, we find in both hemispheresmany species that are very fond of wandering over the vegetation andvisiting the nectaries, food-bodies, etc. In the tropics whole generahave become largely or exclusively arboreal, but this does not mean RELATIONS OF AXTS TO IASCULAR PL
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Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectants, bookyear1910
