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1912. Plecopteres I. Fam. Perlodidae. 



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1913. Bemerkungen zur Flugeladerung der Plecop- 



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1921. Plecopteres noveaux. 



Ann. Soc. Ent. Belg., 61 :57-67 et 146-150. 



1923. Plecoptera II. Fam. Perlidae. 



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1908. Notes on the Aquatic Insects of Walnut Lake. 



Rept. Geol. Surv. Mich, for 1907, p. 262. 



