164 
Catalogue of the Insects of the Oriental Region. No. 7, Order Coleoptera, 
Family Hydrophilida ;. — By E. T. Atkinson, B. A, 
Family HYDROPHILIDiE. 
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, 1. c. supra. 
Leconte describes the species of this family as living on ‘ decomposing 
vegetable matter, though the larvse 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 Btria.’ 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, Hydrophilini, Hydrobiini, 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. 
Soller, M : — 
Observations sur la tribu des Hydrophiliens et principalement sur le genre 
Hydro phi lus de Fabricius, in Ann. See. Knt. Fr., iii, 1834, p. 299. 
HYDROPHILINI ( Hydrophilides ) : — Lacordaire, Gen. Col., i, 1854, p. 447. 
Genus HYDROPHILUS. 
GeofTroy, 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. Amor., Col., i (2), p. 54 : Leconte & Horn, Class. Col., 
p. 71. 
Hydrodema, Lap. de Casteln., Hist. Nat. Ins. Col., ii, 1840, p. 51. 
Hydrosoma, Lap. de Casteln., 1. c., p. 50. 
Hydrous, Leach, Zool. Misc., iii, 1817, p. 92. 
Mesocanttiious, Hope, Col. Man., ii, 1838, p. 126. 
Stethomus, Solier, Ann. Soc. Ent. Fr., iii, 1834, p, 307. 
Temnopterns, Solier, l.o., p. 307. 
Tetraeanthus, Hope, Col. Man,, ii, 1838, p. 126. 
acumlnatus, Motscliulsky, Et. Ent., ii, 1853, p. 44. 
Hab. China, 
caschmirensls, Bedtenbacher, Hiigel’s Kaschm., iv (2), 1844, p. 513, t, 24, f. 2. 
Hab India, Kashmir \_Ind. Mm., Malda], 
nigriceps, Fabr., Syst, Eleuth., i, 1801, p. 254. 
Hab, India, 
