WATER BEETLES IN RELATION" TO PONDFISH CTJLTTJRE. 



345 



Stein, Friedrich. 



1847. Vergleichende Anatomie und Physiologie der Insekten. Erste Monographie. Ueber die 

 Geschlechts-Organs und den Bau des Hinterleibes bei den weiblichen Kafern. 8+139 

 pp. Berlin. 

 Thomson, Charles Gustav. 



1859. Skandinaviens Coleoptera, Synoptiskt Bearbetade. Vol. 1. Lund. [Enochrus estab- 

 lished, p. 18.] 

 Ward, John J. 



1914. Some new discoveries in natural history. A tool-using insect. Strand Magazine, vol. 48, 

 pp. 523-525, 5 figs. London and New York. 

 Wesenberg-Lund, C. 



1913. Biologische Studien iiber Dytisciden. International Review der gesamten Hydrobiologie 

 und Hydrographie, ser. 5, No. 1, 129 pp., 9 pis., 5 figs. Leipzig. 



WiCKHAM, H. F. 



1893. Studies on the male tarsus in some adephagous Coleoptera. Bulletin, Laboratories of Nat- 



ural History, State University of Iowa, Vol. II, No. 4, pp. 322-329, Pis. V-VIII. Iowa 

 City. [Described the dilated tarsi of three species of Cybister, one of Thermonectes, one 

 of Acilius, five of Dytiscus, and one of Colymbetes.] 

 1893a. Description of the early stages of several North American Coleoptera. Ihid., pp. 330-344, 

 PI. IX. [Included Gyrinus picipes Aube, Dineutes americanus Say, Tropisternus glaber 

 Herbst, and BracTiinus janthinipennis.] 



1894. On some aquatic larvae, with notice of their parasites. The Canadian Entomologist, Vol. 



XXVI, pp. 39-41. London, Canada. [Included a bombardier beetle and a hymenopter 

 on the pupa of Dineutes americanus, and an ichneumon on the pupa of a species of Gyrinus, 

 while a pupa of Tropisternus glaber was infested with the maggots of a species of Phora, one 

 of the Diptera.] 



1895. On the larvae of Hydrocharis obtusatus and Silpha surinamensis. Entomological News, Vol. 



VI, pp. 168-171, PI. VI. Philadelphia. [An abstract given on page 314.] 

 1895a. The Coleoptera of Canada. . The Canadian Entomologist, Vol. XXVII, pp. 69-76, 117-122, 



149-153, 181-186, 213-216. London, Canada. 

 1911. A list of the Coleoptera of Iowa. Bulletin, Laboratoris of Natural History, State University 

 of Iowa, Vol. VI, No. 2, pp. 1-40, Iowa City. 

 Wilson, Charles Branch. 



1923. Life history of the scavenger water beetle (Hydrous (Hydrophilus) triangularis) and its eco- 

 nomic relation to fish breeding. Bulletin, U. S. Bureau of Fisheries, Vol. XXXIX, 1923- 

 24, pp. 9-38, 22 figs. Washington. 

 Wintersteiner, Fred. 



1913. Environment of Hydrophilidse. Journal, New York Entomological Society, Vol. XXI, 

 pp. 54-55. New York. [All the Hydrophilidse except the Sphseridini are aquatic, yet 

 only four genera. Hydrous, Tropisternus, Hydrophilus, and Berosus, can swim. The rest 

 crawl about on submerged vegetation.] 

 Wright, A. H. 



1920. Frogs: Their natural history and utilization. Appendix VI, Report of the U. S. Commis- 

 sioner of Fisheries for 1919, Bureau of Fisheries Document No. 888, 44 pp., 22 pis., 2 figs. 

 Washington. [See quotation on page 248.] 



Xambeu, V. 



1894. Moeurs et metamorphoses d'insectes [Hydrophilides]. Annales, Soci^te Linneenne de Lyon, 



N. S., T. 41, pp. 132-135. 



1895. Idem. Ibid., T. 42, pp. 25-42. 

 Zaitzev, Ph. 



1908. Catalogue des Coleopteres aquatiques des families des * * * Hydrophilidae. Horae 

 Societatis Entomologicae Rossicae, vol. 38, pp. 324-418. St. P^tersbourg. 



