OR, MANUAL OF THB APIARY. 193 



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Flicgcn, etc. (Mull. Arch, fur Anat.,) 1852. 

 Graber, Dr. V.— Ucbcr die Blutkorperchen dcr Inscktcn, 1871. 



Ucbcr den propulsatorischen Apparat der Insekten, 1872. 



Vcrlaufiger Bericht uber den propulsatorischen Appa- 

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1878. 

 Die Chordotonalen Sinnesorganc und das Gchor dcr In- 

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 Grassi, Dr. B. — Intorno alio sviluppo delle Api nell' uovo, 1883, 



1884, 1886. 

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1886. 

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1889. 

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 Hauser, G. — Physiologische und histologische Uatersuchungen 



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 llaviland, J. D. — The Social Instincts of Bees, their Origin 



and Natural Selection, 1882. 

 Heddon, James — Success in Bee-Culture, 1886. 

 Hclmholz — Sensations of Tone. 

 Hicks, Dr. J. Braxton — On a new structure in the Antennae of 



Insects (Jour. Linn. Soc.,) 1857. 

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The Honcy-Bee (Samuelson and Hicks,) 1860. 



Hickson, Dr. S. J.— The Eye and Optic Tract of Insects (Quart. 



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 Hopkins, Isaac — Australasian Bee-Manual, 1886. 

 Huber, F. — Nouvelles observations sur les Abeilles, 1814, (and 



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 Hunter, J.— On Bees (Philosophical Trans.,) 1792. 



Manual of Bee-Keeping, 18 — 



Hutchinson, W. Z.— Advanced Bee-Culture, 1883. 



Comb Honey, 1897. 



Hyatt, J. D.— The Structure of the Tongue of the Honey-Bee 



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The Sting of the Honey-Bee (ibid,) 1878, p. 3. 



The Sting of the Honey-Bee (Pop. Sc. Mon.,) 1879. 



Janscha, I. A.— Hinterlassene vollstandige Ivchre von dcr Bien- 



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