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Hamilton, W. D. 1972. Altruism and related phenomena, mainly in social insects. Annual Review of Ecology and Systematics 3:193-232.
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Hamm, A. H. 1902. Formica exsecta in South Devon. Entomologist's Monthly Magazine 38:266.
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Hallett, H. M. 1912 ("1911"). A list of Hymenoptera Aculeata recorded for the county of Glamorgan. Transactions of the Cardiff Naturalists' Society 44:92-99.
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Haldeman, S. S. 1849b. On several new Hymenoptera of the genera Ampulex, Sigalphus, Chelonus and Dorylus. Proceedings of the Academy of Natural Sciences of Philadelphia 4:203-204. PDF
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Haldeman, S. S. 1844. Descriptions of insects, presumed to be undescribed. Proceedings of the Academy of Natural Sciences of Philadelphia 2:53-55. PDF

Notes: Published between 30 April 1844 and 21 June 1844. See Nolan (1913).

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Hahn, C. W. 1832. Die Wanzenartigen Insecten. Getreu nach der Natur abgebildet und beschrieben. Band I, Heft 3. Nürnberg: Zeh, pp. 81-118. PDF

Notes: Publication date from Sherborn (1914). See also Bergroth (1919).

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Halberstadt, K. 1963. Zur Pigmentierung der Formicinenkutikula. Symposia Genetica et Biologica Italica 12:214-220.
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