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She is at once recognized as a stranger and attacked and slaughtered with the same vigor as the larvae of the Hylotoma sawfly and the Saperda beetle, neither of which bears any outward resemblance to the larva of the wasps. Seeing that identity of shape and costume does not save the Polistes, how will the Volucella fare, with her clumsy imitation?
Bates, now in the possession of William Wilson Saunders, Esquire. The insect was not enveloped in any pellicle, nor had the cell been closed in any way; the wings were crumpled up at its side, as is usual in Hymenopterous insects which have not expanded them, proving satisfactorily that it had never quitted the cell, and that Trigonalys is the parasite of Polistes.
Among the Hymenoptera, few genera have created greater dispute than the anomalous genus Trigonalys of Westwood. Mr. Macgillivray one day brought to the British Museum the nest of a Brazilian Polistes. My friend, Mr.
I could not help noting how similar they were to the way in which a man would act who wished to return to some spot not easily found out, and with which he was not previously acquainted. A specimen of the Polistes carnifex was hunting about for caterpillars in my garden. I found one about an inch long, and held it out towards the wasp on the point of a stick.
Smith says: "John Macgillivray, Esquire, Naturalist to Her Majesty's Ship Rattlesnake, lately presented to the British Museum the nest of a South American species of Polistes, which he says is very abundant at St.
Frederick Smith, is well known for his profound knowledge of the Hymenoptera, Exotic and British, which, though he has studied them ONLY fourteen years, are better known to him, perhaps, than to any other living Entomologist; the instant that he looked at the nest, he exclaimed, "Why, here is Trigonalys!" and certainly a large, black-headed creature, not very like Polistes, protruded from one of the cells.
Both of these gentlemen were fond of natural history, especially the father, who was a good observer of the habits of birds. He encouraged natural history researches. Trigonalys compressus. Smith. Trans. Ent. Soc. Lond. n. ser. 1. p. pl. 16. f. 2. Sphex compressa. De Geer. Mem. 3. Trigonalys bipustulatus. Nat. Hist. 7 1851. Habitat: Nest of Polistes lanio. Brazil.
Salvador, where even in the streets it attaches its nest under the eaves of houses; the species is the Polistes lanio of Fabricius, and in all probability the Vespa canadensis of Linnaeus; a specimen of the species is preserved in the Banksian Cabinet.
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