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It is usually found lying down and shows labored breathing that is occasionally interrupted by paroxysmal coughing. The death rate in poorly-cared-for herds is heavy. VERMINOUS BRONCHITIS AND PNEUMONIA OF SHEEP. The two lung worms of sheep are the Strongylus filaria and Strongylus rufescens. The S. filaria is thread-like and the S. refuscens hair-like in appearance.
I shall call it the Chalicodoma, or Mason-bee, of the Sheds. There is no objection to the use of this name in a book where the reader prefers lucidity to the tyranny of systematic entomology. The second species, that which builds its nests on the branches, is Chalicodoma rufescens, J. PEREZ. For a like reason, I shall call it the Chalicodoma of the Shrubs.
I shall do nothing of the kind; for here, to my knowledge, is a contradictory and very significant result. Among the treasures of my harmas-laboratory, I place in the first rank an Ant-hill of Polyergus rufescens, the celebrated Red Ant, the slave-hunting Amazon.
When the instinct was once acquired, if carried out to a much less extent even than in our British F. sanguinea, which, as we have seen, is less aided by its slaves than the same species in Switzerland, I can see no difficulty in natural selection increasing and modifying the instinct always supposing each modification to be of use to the species until an ant was formed as abjectly dependent on its slaves as is the Formica rufescens.
Arabs, fertility of crosses with other races; gashing of cheeks and temples among the. Arachnida. Arakhan, artificial widening of the forehead by the natives of. Arboricola, young of. Archeopteryx. Arctiidae, coloration of the. Ardea asha, rufescens, and coerulea, change of colour in. Ardea coerulea, breeding in immature plumage. Ardea gularis, change of plumage in.
The case of a species in another order of birds Crypturi strikes me as being similar to this of the oven-bird, and seems to lend some force to the suggestion I have made concerning the early development of voice in the young. Rhynchotus rufescens, a bird the size of a fowl, inhabiting the pampas, is perhaps the sweetest-voiced, and sings with great frequency.
The young of Ardea rufescens and A. caerulea of the United States are likewise white, the adults being coloured in accordance with their specific names. On the other hand we have good reason to believe that whiteness has been gained by many birds as a sexual ornament.
When the instinct was once acquired, if carried out to a much less extent even than in our British F. sanguinea, which, as we have seen, is less aided by its slaves than the same species in Switzerland, I can see no difficulty in natural selection increasing and modifying the instinct always supposing each modification to be of use to the species until an ant was formed as abjectly dependent on its slaves as is the Formica rufescens.
Let it be observed what a contrast the instinctive habits of F. sanguinea present with those of the continental F. rufescens. The latter does not build its own nest, does not determine its own migrations, does not collect food for itself or its young, and cannot even feed itself: it is absolutely dependent on its numerous slaves.
On the hill of Quetepe, at the foot of the Malpighia cocollobaefolia, the leaves of which are extremely coriaceous, we gathered, among tufts of the Polygala montana, the first melastomas, especially that beautiful species described under the name of the Melastoma rufescens. As we advanced toward the south-west, the soil became dry and sandy.
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