12 Arachn. 
Xl. Arachnida. 
[1917] 
Habitats. 
Freshwater Halacaridae ; Walter, 
87. 
Marine Tardigrada ; Hay, 36. 
Parasitism and Symbiosis (see also 
Economics). 
On Mammals, Acari ; Hirst, 45, 46, 
47 : Ixodidae Herms, 38 : Lahille, 52 : 
Gytoleichus (Sarcopt. ) ; Weidman, 89. 
On Lizards, Acari ; Hirst, 44. 
On Insects, Gamasidae ; Hull, 50. 
Plant Galls vide Eriophyidae. 
Miscellaneous. 
Webs, Araneae ; Nielsen, 66 : Nemo - 
scolus ( Argiop .) ; Berland, 10 : Web 
stretchod by a weight ; von Porat, 73. 
Nests, Aviculariidae ; van Dam & 
Roberts, 24. 
VARIATION AND AETIOLOGY 
3023. 
Abnormal Spiders j Falconer, 32 ; 
Abnorm. genital system, male Scor- 
piones ; Pawlowsky, 71, 72. 
DISTRIBUTION. 
Geographical. 3027. 
Europe and Mediterranean 
Islands. d 
Europe, Acari ; Oudemans, 69. 
Sweden, Hydrachnidce ; Lundblad, 55. 
Germany, Trombidiidae ; Goosmann, 
33. 
Limburg, Hydrachnidae ; Romyn, 
76. 
Scotland, Hydrachnidae ; William- 
son, 93, 94. 
England, Acari ; Hirst, 47, 48 : 
Hydrachnidae ; Soar, 78 : N. England, 
Gamasidae ; Hull, 50 : Cumberland, 
Araneae ; Hull, The Vasculum, Hex- 
ham 3 1917 pp. 30-31 : Oribatidae ; 
Hull t.c. pp. 62-64 : Lancashire and 
Cheshire, Eriophyidae ; Bagnall, 6 : 
Pseudoscorpiones ; Standen, 81 : Ara- 
neae, Opiliones ; Lancs. Nat. Darwen 
9 1917 p. 297, 10 1917 pp. 180-182: 
South Devon, Hydrachnidae ; Ala- 
baster, 4 : Epping Forest, Hydrach- 
nidae ; Soar, 79. 
Spain, Fseudoscorpiones j Nonidez, 
68. 
Switzerland, Opiliones ; de Lessert, 
53 : Scorpiones ; de Lessert, 54 : 
Halacaridae ; Walter, 87. 
Trieste, Tardigrada ; Heinis, 37. 
Salonica, Araneae, Opiliones ; Simon , 
77. 
Rhodes, Ixodidae ; Paoli, 70. 
Asia and Malay Archipelago. e 
Japan, Corea and Formosa, Leptus 
( Trombid .) ; Miyajima & Okumura, 59. 
Yunnan Fu, Acari ; Hirst, 44. 
India and . Ceylon, Aviculariidae ; 
Chamberlin, 18 : Sind, Acari ; Hirst, 
44. 
Malay Peninsula, Acari ; Hirst, 44. 
Persia, Acari ; Hirst, 44. 
Africa and Madagascar. / 
South Africa, Solifugae , Araneae ; 
Hewitt, 41 : Aviculariidae ; Tucker, 
84 : Cape Colony, Acari ; Hirst, 44. 
Cameroons, Hydrachnidae ; Viets, 
85. 
Portuguese East Africa, Acari ; 
Hirst, 44. 
Socotra, Acari ; Hirst, 44. 
North America. g 
Aviculariidae ; Chamberlin, 18 : 
Araneae ; Emerton, 29 : Oribatidae ; 
Ewing, 30 : Canada, Araneae ; Emer- 
ton, 28. 
United States, Acari ; Banks, 9 : 
Ewing, 31 : Trombidiidae ; McGregor, 
57 : Tetranychus bimaculatus ; Mc- 
Gregor & McDonough, 58 : Adiron- 
daeks, Araneae ; Emerton, 27 : Phila- 
delphia, Sarcopiidae ; Weidman, 89 : 
North Carolina (marine), Tardigrada ; 
Hay, 36 : California, Solifugae ; Nisbet, 
67 : Pedipalpi ; Moles, 60 : Pseudo - 
scorpiones ; Moore, 61. 
Mexico, Scorpiones ; Borelli, 12 ; 
Herrera, 40. 
