86 
MR. CHAS. D. SOAR ON THE HYDRACHNIDS 
The nomenclature used is the same as used by Dr. Piersig 
in his account of all known Water Mites in Das Tierreich, 
Berlin, 1901. 
The names given where found refer to the different parishes 
in the Broads district. 
HYDRACHNIDS. 
Genus I. ARRHENURUS. 
All the members of this genus are hard skinned, with very 
bright colours. Reds, blues, greens, and yellows. The males 
very unlike the females. 
1 . A. albator, Mull. Not common. Potter Heigham, 
W roxham. 
2 . A. bruzelli, Koen. Potter Heigham, Wroxham. 
3 . A. caudatus, Geer. Potter Heigham, Sutton, 
Wroxham, Barton, Horning. 
4. A. claviger, Koen. Common. Potter Heigham, 
Sutton, Ranworth, Hickling, Ingham. 
5. A. cordatus, Pier. Rare. Potter Heigham. 
6 . A. crassicaudatus, Ivram. Potter Heigham, Ormesby, 
Rollesby. 
7. A. compactus, Pier. Rare. Sutton. 
8 . A. forpicatus, Neuman. Rare. Sutton. 
9. A. freemani, Halb. Sutton. 
10 . A. globator, Mull. Common. Catfield, Sutton, 
Ranworth, Potter Heigham, Wroxham. 
11. A. leukarti, Pier. Rare. Sutton, Ranworth. 
12. A. maculator, Mull. Fairly common. Catfield, 
Wroxham, Sutton, Hoveton St. John. 
13. A. ornatus, George. Common in 1904. Sutton. 
14. A. robustus, Koen. Rare. Catfield. 
15. A. sinuator, Mull. Catfield, Sutton. 
16 . A. solidus, Pier. Ranworth, Wroxham. 
1 7. A. tricuspidator, Mull. Sutton, Catfield. 
18. A. tubulator, Mull. Common in 1904. Catfield, 
Sutton, Ranworth. 
19. A. virens, Neuman. Ranworth, Hickling. 
