WATER BEETLES IN RELATION TO PONDFISH CULTURE. 
339 
Hall, C. A. 
1914. Common British beetles, viii-f-88 pp., 23 pis. London. [The adult and larva of Dytiscus 
marginalis were well described and finely figured.] 
Hankinson, Thos. L. 
1907. A biological survey of Walnut Lake, Mich. Michigan State Biological Survey Report for 
1907, pp. 156-288, 75 pis. Lansing. [Contained notes"on aquatic insects by J. G. Need- 
ham, pp. 252-271.] 
Harris, Thaddeus William. 
1828. Contributions to entomology; Dytiscidse. New England Farmer, vol. 7, No. 5, p. 156 
and No. 6, P- 164. Boston. 
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. 
Henneguy, L. Felix. 
1904. Les insectes: Morphologie, reproduction, embryogenie. xviii+804 pp., 622 figs., IV col. 
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Henshaw, Samuel. 
1885. List of the Coleoptera of America north of Mexico. 161 pp. Published by American En- 
tomological Society, Philadelphia. 
Hentschel, Ernst. 
1909. Das Leben des Siisswassers. Eine gemeinverstandliche Biologie. IV+336 pp., 299 figg. 
17 Taf. Munchen. [Included water beetles.] 
Herbst, Johann Friedrich Wilhelm. 
1797. Natursystem. * * *. Kafer. Bd. 7. Berlin. [Included water beetles.] 
Holste, G. 
1910. Das Nervensystem von Dytiscus marginalis. Ein Beitrag zur Morphologie des Insekten- 
korpers. Zeitschrift fur naturwissenschaftliche Zoologie, Bd. 96, pp. 419-476. Leipzig, 
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XLI, pp. 150-156, 2 figg. Leipzig. 
Hope, Frederic William. 
1838. The coleopterists’ manual. Vol. 2. London. [Proposed the genus Hydrocharis, p. 125, 
which becomes a synonym of Hydrophilus.] 
Horn, George H. 
1883. Miscellaneous notes and short studies of North American Coleoptera. Transactions, Ameri- 
can Entomological Society and Proceedings, Entomological Section of the Academy of 
Natural Sciences, Vol. X, pp. 269-312, PI. IX. Philadelphia. 
1883a. [Maxillae of Gyrinidae.] Ibid. (Proceedings), p. xvi. 
1885. A note on some Hydrophilidae. The Canadian Entomologist, Vol. XVII, pp. 137-139. 
London, Canada. 
1890. Notes on the species of Ochthebius of Boreal America. Transactions, American Entomologi- 
cal Society, Vol. XVII, pp. 17-26, PI. II. Philadelphia. 
1890a. Notes on some Hydrobiini of Boreal America. Ibid., pp. 237-278, Pis. Ill and IV. 
1890b. A revision of the Sphaeridiini inhabiting Boreal America. Ibid., pp. 279-314, PI. IX. 
Jacqueline-Duval, Pierre Nicholas Camille. 
1856. Manuel entomologique. Genera des Coleopteres d’Europe. * * *. Tome 1, cah. 3. 
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Juday, Chancey. 
1907. A study of Twin Lakes, Colo. , with especial consideration of the food of the trouts. Bulletin, 
U. S. Bureau of Fisheries, Vol. XXXVI, 1906 (1907), pp. 147-178, PI. Ill, 6 text figs., 
11 tables. Washington. 
Kellogg, Vernon L. 
1908. American insects, xiv +694 pp. , 812 figs. Henry Holt & Co., New York. 
