LIFE HISTORY OF HYDROUS ( HYDROPHILUS ) TRIANGULARIS. 37 
Haupt, H. 
1907. Was mich eine Hydrophilus (Hydrous-) Larve lehrte. Wochenschrift fur Aquarienkunde, 
Bd. 4, pp. 326-328. Braunschweig. 
1909. Zur Biologie der Hydrous- (Hydrophilus-) Larve. Zeitschrift fur Naturwissenschaften, Bd. 
81, pp. 301-304. Leipzig. 
Hentschel, Eenst. 
1909. Das Leben des Susswassers. Eine gemeinverstandliche Biologie. IV+336 pp., 299 fig., 
17 Taf. Miinchen. [Hydrous, p. 236.] 
Laker, Abbott G. 
1881. The cocoons of Hydrophilus piceus and Hydrobius fusdpes. The Entomologist, vol. 14, 
pp. 82-84. London. 
Lyonet, Pierre. 
1832. Recherches sur l’anatomie et les metamorphoses de differentes especes d’insectes, ouvrage 
posthume by Pierre Lyonet. Publie parM. W. DeHaan. Accompagndes de 54 planches. 
iv+580 pp. Paris. [ Scarab de aquatique, pp. 127-151.] 
Mabbott, Douglas C. 
1920. Food habits of seven species of American shoal-water ducks. U. S. Department of Agri- 
culture, Bulletin No. 862, 70 pp., YII pis. Washington. 
Matheson, Robert. 
1914. Notes on Hydrophilus triangularis Say. The Canadian Entomologist, Vol. XLVI, pp. 
337-343, PL 22, figs. 29-31. London, Canada. 
McAtee, W. L., and F. E. L. Beal. 
1912. Some common game, aquatic, and rapacious birds in relation to man. U. S. Department of 
Agriculture, Farmers’ Bulletin No. 497, 30 pp., 14 figs. Washington. 
Megusar, Franz. 
1909. Lebensgeschichte der Hydrophiliden. Verhandlungen der k. k. zoologisch-botanischen 
Gesellschaft in Wien, Bd. LIX, pp. 278-287. 
Miall, L. C. 
1895. The natural history of aquatic insects, ix+395 pp., 116 figs. Macmillan & Co., London 
and New York. [The great water-beetle ( Hydrophilus piceus), pp. 61-87, figs. 13-18.] 
Miger, Felix, et Lancret. 
1804. Sur les larves Hydrophyles et Dytiques. Bulletin, Paris Socidtd philomatique, T. 3, pp. 
229-234. 
1809. Mdmoires sur les larves des insectes Larves des insectes coldoptbres aquatiques. Annales 
du Museum d’Histoire naturelle, T. 14, pp. 441-459. Paris. 
Needham, James G. 
1904. Beetle drift on Lake Michigan. The Canadian Entomologist, Yol. XXXVI, pp. 294-296. 
London, Canada. 
Nitzsch, Christian L. 
1811. Uber das Athmen der Hydrophilen. Archiv fiir die Physiologie von Reil, Bd. 10, pp. 
440-458, PL 9. 
Orchymont, A. d’. 
1913. Contribution & l’etude des larves hydrophilides. Annales de Biologie Lacustre, T. 6, pp. 
173-214. Bruxelles. 
Planet, Louis. 
1891. Developpement de l’Hydrophile brun ( Hydrophilus piceus ). Hydrophilus piceus, Meta- 
morphoses. Le Naturalist®; revue illustree des sciences naturelles, 2® Sdrie, 13 e Amide, 
pp. 259-260. Paris. 
Poujade, G. A. 
1901. Sur V Hydrophilus piceus Linn. Bulletin de la Societe entomologique de France, T. 70, pp. 
229-230. Paris. 
1902. Note sur V Hydrophilus piceus. Ibid., T. 71, pp. 206, 219, 238. 
Reuter, Edmund. 
1909. Coleoptera. In Die Susswasserfauna Deutschlands, hrsg. von A. Brauer. iv+235 pp. 
Jena. [Hydrophilidse, p. 51.] 
