Livres associés

Variation and correlation in the crayfish with special reference to the influence of differentiation and homology of parts.

On the so-called Dimorphism in the Genus Cambarus.

Observations on the Astacidae in the United States National Museum and in the Museum of Comparative Zoology with descriptions of new species.

Notes on North American Crayfishes, family Astacidae.

• Monographie des calopt�erygines
  Auteur(s): Hagen, Hermann August ,  S�elys-Longchamps, Michel-Edmond
• Synopsis of the neuroptera of North America with a list of the South American species
  Auteur(s): Hagen, Hermann August
• Bibliotheca entomologica. Die Litteratur über das ganze Gebiet der Entomologie, bis zum Jahre 1862.
  Auteur(s): Hagen, Hermann August