164 E. T. Atkinson — Catalogue of the Family Hydrophilidss. [Supple 



Catalogue of the Insecta of the Oriental Region. No. 7, Order Coleoptera* 

 Family Hydrophilice. — By E. T. Atkinson, B. A. 



Family HYDXtOPHILIDJE- 



Lacordaire, Gen. Col., i, 1854, p. 443 : Jacq. Duval, Gen. Col. Eur., i, p. 85 : Mun. 



Cat., p. 475 : Leconte & Horn, Class. Col., p. 69. 



Palpicomes, Latreille, Fain. Nat., p. 365 : Brulle, Hist. Nat. Ins. Col., ii, p. 

 242 : Lacordaire, I. c. supra. 



Leconte describes the species of this family as living on 'decomposing 

 vegetable matter, though the larva? are carnivorous and quite voracious : 

 the majority of them are aquatic. Except those of the tribe Helophorini, 

 they are of an oval, convex form, sometimes hemispherical • the elytra 

 are sometimes striate, and sometimes have a distinct sutural stria.' The 

 palpi are slender, and always very long. The tarsi are 5-jointed and 

 according to the length of these joints, the family is divided into four 

 tribes : — Helophorini, Hydroplvilini, Ilydrobiini, and Sphaeridini. Very 

 little has been done to work out the species of this family that occur in 

 the Oriental Region, and this Catalogue is therefore based on the Munich 

 list. Dr. Sharp observes that though the habits of the species of this 

 family are aquatic they cannot correctly be associated with the. Dytiscidce 

 and Gyrinidce in the Adephagous series, but will have to be properly placed 

 when more is known about them. 



Solier, M :— 



Observations sur la tribu des Hydrophiliens et principalement sur le genre 



Ilydrophilus de Fabricius, in Ann. Soc. Ent. Fr., iii, 1834, p. 299. 

 HYDROPHILINI (Eydrophilides) :- Lacordaire, Gen. Col., i, 1854, p. 447. 



Genus HYDXiGPHXLUS. 



Geoffrey, Ins. Paris, i, 1764, p. 180 : Solier, Ann. Soc. Ent. Fr., iii, 1834, p. 312 : 



Lacord., Gen Col., i, p. 450 : Jacq. Duval, Gen. Col. Eur , i, p, 86 : Mun. Cat., p. 



475 : Sharp, Biol. Centr. Amer., Col., i (2), p. 54 : Leconte & Horn, Class. Col., 



p. 71. 



Eydrodema, Lap. de Casteln., Hist. Nat. Ins. Col., ii, 1840, p. 51. 



Hydrosoma, Lap. de Casteln., /. c, p. 50. 



Hydrous, Leach, Zool. Misc., iii, 1817, p. 92. 



MesooantMcus, Hope, Col. Man., ii, 1838, p. 126. 



Stethcxus, Solier, Ann. Soc. Ent. Fr., iii, 1834, p. 307. 



Temnopterus, Solier, I.e., p. 307. 



Tetracantlms, Hope, Col. Man., ii, 1838, p. 126. 

 acuminatus, Motschulsky, Et. Ent., ii, 1853, p. 44. 



Hab. China. 

 caschmirensis, Kedtenbacher, HiigePs Kaschm., iv (2), 1844, p. 513, t. 24, f. 2. 



Hab India, Kashmir [Ind. Mus., Malda], 

 nlgriceps, Fabr., Syst. Eleuth., i, 1801, p. 254. 



Hab, India. 



