36 Hydro vatus. — Heterhydrus. 



Simplex Sharp, On Aquat. Carn. Col. 1880-82, p. 322. 

 - Mars. L'AbeiUe XX, 1882, p. 45. 



sinister Sharp, Trans. Ent. Soc. London 1890, p. 343. — 



R6g. Ann. Soc. Ent. France LXVIII, 1899, 



p. 236. 

 sordidus Sharp, On Aquat. Carn. Col. 1880—82, p. 327. — 



Mars. L'AbeiUe XX, 1882, p. 46. - R6g. Ann. 



Mus. Genova (2) V, 1887, p. 636; M6m. Soc. 



Ent. Belg. IV, 1895, p. 107. 



var. humilis Sharp, 1. c. p. 327. — Kolbe, 



Arch. Naturgesch. XLIX, 1883, p. 423. — R6g. 



M6m. Soc. Ent. Belg. IV, 1895, p. 107; Ann. 



Soc. Ent. France LXXII, 1903, p. 11. - Scott, 



Trans. Linn. Soc. Lond. XV, 1912, p. 253. 

 spissicornis R6g. Bull. Soc. Ent. Ital. XXXVI, 1904, 



p. 265. 

 subrotundatus Motsch. Etud. Ent. VIII, 1859, p. 41. — 



Sharp, On Aquat. Carn. Col. 1880-82, p. 815. 

 testudinarius R6g. Mem. Soc. Ent. Belg. IV, 1895, 



p. 106; Ann. Soc. Ent. France LXXII, 1903, 



p. 11. 

 Huiformis Fairm. Ann. Soc. Ent. France (4) IX, 1869, 



p. 185 (Hyphydrus). — Sharp, On Aquat. 



Carn. Col. 1880-82, p. 332. - Kolbe, Arch. 



Naturgesch. XLIX, 1883, p. 423. - R6g. 



M6m. Soc. Ent. Belg. IV, 1895, p. 114. 

 validicornis R6g. 1. c. p. 102. 

 87 



Otueda Sharp. 



Pars 71 



Korsika, 

 Sardinien, 

 Spanien 



Ceylon, 

 Borneo 



Ägypten, 

 Syrien, 

 Meso- 

 potamien, 

 Abessinien, 

 Arabien 



Madagaskar 



? Gabon 



Indien 



Madagaskar 



Natal 



Sharp, On Aquat. Carn. Col. 1880—82, p. 336, 849. — Zimmerm. 

 Arch. f. Naturgesch. 83, 1917 (1919), A. 12, p. 126. 



compressa Sharp, 1. o. p. 336, t. 10, f. 122. 

 1 



Brasilien 



3. Tribus: Hyphydrini. 



Sharp,' On Aquat. Carn. Col. 1880-82, p. 370, 927. — Zimmerm. 

 Arch. f. Naturgesch. 83, 1917 (1919), A. 12, p. 127. 



Heterhydpus Fairm. 



Fairm. Ann. Soc. Ent. France (4) IX, 1869, p. 186. — Sharp, On Aquat. 

 Carn. Col. 1880-82, p. 337, 850. - R6g. Mem. Soc. Ent. Belg. IV, 1895, 

 p. 60. - Zimmerm. Arch. f. Naturgesch. 83, 1917 (1919), A. 12, p. 128. 



agaboides Fairm. Ann. Soc. Ent. France (4) IX, 1869, Madagaskar 

 p. 186. — Kolbe, Arch. Naturgesch. XLIX, 

 1883, p. 424. - R6g. Mem. Soc. Ent. Belg. IV, 

 1895, p. 61. 



senegalensis Aub6, Spec. Col. VI, 1838, p. 453. — Sharp, Westafrika 

 On Aquat. Carn. Col. 1880-82, p. 337, t. 10, 

 f. 124. - R6g. M6m. Soc. Ent. Belg. IV, 1895, 

 p. 60. 

 2 



