Tanquary, M. C. 1912. Biological and embryological studies on Formicidae. Urbana Champagne: University of Illinois, i-iv, 1-100, 8 pls. PDF

Notes: Comparative embryological study of Camponotus herculeanus ferrugineus Fabr. and Myrmica scabrinodis sabuleti Meinert on pp. 62-96

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Ganin, M. 1869. Über die Embryonalhülle der Hymnopteren- und Lepidopteren-Embryonen. Mémoires de l'Académie impériale des sciences de St. Pétersbourg 7e serie 14(5):18 pp., 1 pl. PDF

Notes: Embryogenesis Formica fusca.

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Daly, H. V. 1955. A comparative survey of the sting of aculeate Hymenoptera. Lawrence, KS: University of Kansas, i-ii + 1-60 pp. + 7 pls. PDF

Notes: Master's Thesis

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Horn, W.; Kahle, I. 1935. Sammlungen, welche ihren Eigentümer gewechselt haben [Part 1]. Entomologische Beihefte aus Berlin-Dahlem 2:1-160.
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McCook, H. C. 1881. The honey ants of the Garden of the Gods. [part]. Proceedings of the Academy of Natural Sciences of Philadelphia 33:25-56.
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