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THE STUDY OF ENTOMOLOGY. 
Subsection 3rd.— Philydrida ; Amphibious Beetles, or such as 
haunt water. 
Family X.—ParnTdjE, 1 Genus, 1 Parnus. 
Family XI.— HeteroceridjE ; 1 Genus; 1 Heterocerus. 
Family XII.—LimniiDjE; 2 Genera. 
1 Georyssus; 2 Elmis. 
Family XIII.— Helophorid#: ; 4 Genera. 
1 . Hydrbchus, 3. Ochthebius, 
2. Helophorus, 4. Hydr'cena. 
Family XIV.— Hydropiji'lidtj ; 6 Genera. 
1. Limnebius. 4. Spercheus, 
2. Hydrous, 5. Berosus, 
3. Hydrophilus, 6. Hydrobius. 
Family XV.— SphjERId'idi#: ; 2 Genera. 
1. Cercyon, 2. Sphseridium. 
Family XVI.— Anisotomid#: ; 9 Genera. 
1. Tritoma, 4. Leiodes, 7. Clypeaster 
2. Phalacrus, 5. Agatliidium, 8. Anisotoma, Kirby M SS. 
3. Ephistemus, 6. Clambus, 9. Scaphidium, Marsh. 
Subsection 4th.— Necrophaga ; Beetles that feed on Carrion, 
Putrid Wood, and Fungusis. 
Family XVII.— Scaphididte; 6 Genera. 
1. Scaphidium, 3. Myl'sechus, 5. Catops, 
2. Scaphisbma, 4. Homaphagus, 6. Choleva. 
Family XVIII.— Silphi'd^e : 7 Genera. 
1. Necrophbrus, 3. Oiceoptoma, 5. Phosplniga, 
2. Necrodes, 4. Silpha, 6. Agy'rtes, 
7. Peltis. 
The species of more than ordinary interest, in this family are the 
Necrophorus Sepultor, and Vespillo, or Burying Beetles, which may 
be met with wherever there is putrid flesh on the ground; they are 
said to be possessed of extraordinary powers of smelling their food 
at a great distance. Mr. Rennie informs us in Insect Miscellanies , 
