Published in Journal für Ornithologie, in 1889, in volume 37, pages 225-230
Created: 2014-09-04, modified: 2014-09-04![](https://www.biodiversitylibrary.org/pagethumb/32710258,60,60)
Published in Journal für Ornithologie, in 1896, in volume 44, pages 81-92
Created: 2014-09-04, modified: 2014-09-04![](https://www.biodiversitylibrary.org/pagethumb/33258087,60,60)
Published in Deutsche Entomologische Zeitschrift, in 1897, in volume 1897, issue 1, pages 9-16
Created: 2017-05-07, modified: 2017-05-07![](https://www.biodiversitylibrary.org/pagethumb/32796563,60,60)
Published in Journal für Ornithologie, in 1892, in volume 40, pages 61-110
Created: 2014-09-04, modified: 2014-09-04