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 Lang, A. 1891. Text-Book of Comparative Anatomy. Trans, by H. M. and M. Bernard. 



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 Comstock, J. H., and Kellogg, V. L. 1899. The Elements of Insect Anatomy. Rev. ed. 



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HEAD AND APPENDAGES 



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Breitenbach, W. 1879. Ueber Schmetterlingsriissel. Ent. Nachr., jhg. 5, pp. 237-243. 

 Burgess, E. 1880. Contributions to the Anatomy of the Milk-weed Butterfly (Danais 



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 Breithaupt, P. F. 1886. Ueber die Anatomic und die Functionen der Bienenzunge. 



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Lab. Etud. Soie, 1889-1890, 180 pp., 95 figs. Lyon. 

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