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Iowa Acad. Sci., iv, pp. 172-234, 1897. 

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 The genus Pediopsis ; a review of the North American species. 



<Proc. Davenport Acad. Nat. Sci., vii, pp. 111-123, 1900. 

 A review of the North American species of Idiocerus. 



<Proc. Davenport Acad. Nat. Sci., vii, pp. 124—138, 1900. 

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1889. 

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 A revision of the North American species of Phlepsius. 



< Trans. Amer. Ent. Soc, xix, pp. 63-82, 1892. 

 Baker, C. F. — The North American species of Gnathodus. <Can. 



Ent., 1896, pp. 35^2. 

 Van Duzee, E. P. — Review of the North American species of Bythos- 



copus. <Ent. Amer., 1890, pp. 221-229. 

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pp. 211-214, 1889. 

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OsBORN, H., and Ball, E. D. — A review of the North American 

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TETTIGONIID^. 



SiGNORET, V.^ — Revue iconographique des Tettigonides. <Ann. Soc. 

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Spanberg, J. — Species Gyponae generis Homopterorum. <Bihang 

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