340 Hijdera (4764) ~ 
Hydera Latr. in Cuv., Eegn. anim. III, 
1817, 268 = Potamophilus Oerm. 
1811. Dryop. 6. 
Hydissus Pasc, ANH. (4) 3, 1869, 
148 nota {H. feronioides Pasc. 1866) 
1913: 1(N.S.W.). Ten., Tenehr. 785. 
Hydnocera 0 Newm., EMa. V, 1838, 
379; SpiD., Rev. Zo. 1841, 75; KL, 
Clerii, 1842, 311; Spin., Clerit. II, 
1844, 39; J. Lee, AN YAcSo. V, 
1852, 26; Lae., IV, 1857, 471; Chenu, 
Enc. II, 1860, 268; J. Lee., Class. 
Col. N. Am. I, 1862, 196; (!orh., 
TESL. 1877, 260; BCA.Col. III, 2, 
1883, 168; J. Lee., et Horn Class. 
Col. N.Am. ed. II, 1883, 218; Schklg., 
GIW. Cler. 1903, 92; Wolcott, B. Ind. 
Dept. Geol. Nat. I, 1910, 855 {H. 
humeialis [Say] 1823) 1913:103+2 
(Amer.). Cler., Cleri., Hydnoc. 127. 
Hydora Broun, ANH. (5) 9, 1882, 409; 
ManNZ. Col. III, IV, 1886, 927 
{H. picea [Broun] 1881) 1913:3 
(Nov. Zealand.). Dryop., Dryopi., 
Potam. 13. 
Hydrethus O Fairm., ASEFr. 33, 1889, 
Compt. rend. p. XC; Grouv., BSEFr. 
1896, 77 {H. OMstralis [King] 1865) 
1913:2 (NSW., Madag.). Dryop., 
Dryopi., Potain. 7. 
Hydrocyphon O Kedtb., F. Austr. 1858, 
519; 1872, L 563; Jacq. d« Va!, III, 
2, 152; Muls. etRey, Fossip. Brevicoll. 
1865, 46, 92; Bach, II, Nachtr. 1867, 
425; Tourn., 77; Bourg., FGRh., 15, 
38; SeidL, F. Ba. et Tr.; Fauc., F. 
anal. Col. 1892, 275; Gen. Col. Fr. 
1894, 33; Lam., Man. Belg. II, 1900, 
293; Everfs, II, 1903, 138; Pic, Cat. 
II, 319; Keitt., F. Germ. III, 1911, 
243; Schaufuß in Calwer, 572, 574; 
Muhnt, 588, 591 {H. deflexicollis 
[Mül!.] 1821) 1913:4 (Eur., Gey]., 
Alg.). Helod., Helodi. 10. 
Synops.: Bourg.,; Fauconnet, 1. c. 
Hydromedion Of^ Waterh., TESL. 1875, 
> 333; Fairm., Miss. Sc. Cap Horn VI, 
2, 1891, Col. 42 {H. elongatum Waterh. 
Hygrogeus (4773;. 
1875) 1913:8 (Terr. ignit.). Ten., 
Helop. 1091. 
Biol.: Mjöberg, ArkZo. 1906,nr. 13 
p. 6 sq., t. et figg. 
Hydroscapha 0 J. Lee., TAmES. V 
(1874), 45; Sharp, EMM. 11, 1874/5, 
101; Matth., Essai gen. H. 1876, 1; 
TAmES. 11, 1884, 115; TrichopL 
Suppl. 1900, 13 t. 15 f. 1—8, 10—11; 
J. Lee. et Horn, Class. 1883, 109; 
Rey, Rev. d'E. II, 1883, 84; Flach 
in Seid!., F. Ba., ed. III (1888) Gatt, 
p. 72; F. Tr. (1889) Gatt., p. 72; 
VzbGW. 39, 1889, 523; Best. -Tab. 
18, 1889, 45; Gangib., III, 335; 
Reitt., F. Germ. II, 1909, 11 nota 
f. 9, 14; Schaufuß in Calwer, (299) 
[H. natans I, Lee. 1874, granulum 
[Mötsch.] 1855) 1913:5 (Fennica, Eur. 
medit., Creta, Sard., Lenkoran, Cal.). 
Hydr. 1. 
Hydrothassa O C. G. Thoms., Sk. Col. 
VIII, 1866, 279; Ws., NID. VI, 3, 1884, 
523; Fowler, Col. Brit. Isl. IV, 1890, 
318; Bed6l,V, 140; Jacobs., HoR. 35, 
1900, 89; Everts, II, 442; Reitt., Süß- 
wasserf. Deutschi. 1909, 218; F. 
Germ. IV, 1912, 128; Chap., X, 1874; 
Schaufuß in Calwer, 927, 954; Kuhnt, 
805, 852 {H. gldbra [Herbst in Füessly] 
1783, marginella [L.] 1758, analis [L.] 
1767, hannoverana [F.] 1775) 1916:9 
(Eur. b. et med., Sibir.; Terr. cap., 
Cors., Sard.). Chrys., Chryso., 
Phaedon. 44. 
Biol.: Deg., Mem. V, 1775, 167; 
Rosenh., StEZg. 43, 1882, 156; 
Chapuis et Candeze, MSScLiege 8, 
1853, 612; CorneliuS; StEZg. 18, 
1857, 167; Kaltenb., Pflanzenfoinde 
I, 1872, 7, 10; III, 1874, 7 (?), 769; 
Ws., NID. VI, 3, 1884, 525; W. Kolbe, 
ZEBreslau, 25, 1900, 19; Vion, 
BSLinn. Nord Fr. 7, 1884, 26. 
Hygrogeus Rey, ASLLyon 27, 1880, 
56; Gangib., KäfMEur. II, 1895, 
710; Luze, VzbGW. 52, 1902, 529; 
Sehauf uß in Calwer, 153 {H. aemulus 
