[1921] 
X. Arachnida. 
Arachn. 11 
Spiders Strand, 103; Nesting, etc., 
Nemesiothele denieri. Denier, 28 ; 
Thomisus decipiens, spider imitating 
excrement of birds, Jacobson, 59 ; 
Ghernes clinging to leg of fly, Godfrey 
46 ; Scorpion ( Opisiko thalamus glabi- 
frons), suicide when irritated in alcohol, 
Breijer, 16. 
Habitats. — Cavernioolous, Porhomma 
thorelli, Mercanton, 73 ; Trapdoor 
nest, Ctenyza sauvagesi, Morton, 74. 
Parasitism and Symbiosis (see also 
Economics). — On mammals, Ixodes holo- 
cyclus, Dodd, 30 ; On Man, Dickson 1 , 
29 ; On horse, Sar copies, Buxton; 
17 ; On badger, Acari, Hirst, 52 ; 
On mice, Gamasidae, Trombidiidae, 
Tarsonemidae, Oribatidae, Sarcoptidae , 
Krausse, 67 ; On foxes, Acari, Riley, 
91 ; On bats, Rodiiain, 92 ; Rodhain 
& Gedoelst, 93 ; On penguins, Orni - 
tliodorus talaje capensis, Hewitt, 51 ; 
On chicken, Acari, Hirst, 52 ; On 
birds, Gamasidae, Hirst, 55 ; On 
domestic birds, Acari, Ward & 
Gallagher, 121 ; On toad, Raillietiella 
indica (Pentastom.), Gedoelst, 44 ; 
On bees, experimental infection, 
Tarsonemus woodi, Harvey, 48 ; 
Acarapis woodi. Hirst, 53 ; Tar- 
sonemus woodi, Rennie, 89 ; On 
beetles, Calvolia kneissli, Krausse, 
68 ; On larva of Gelechia gossypiella 
(Lepid.), Pediculoides venlriculosus, 
O’Connor, 80. 
Miscellaneous. — Allen, 1 . — Influence 
of moisture on vitality and ekdysis, 
Ornithodorus moubata, Cunliffe, 24 ; 
Colour adaptation, Misumena vatia , 
E. B. P., 32 ; Paralysing instinct, 
Araneae, Rabaud, 86. 
VARIATION AND AETIOLOGY. 
Gynandromorphism, Ambliyomma 
neumanni, Joan, 60. 
DISTRIBUTION. 
Geographical. 
General. — Roewer, 96. 
Palaearctic. — de Dalmas, 26; Emer- 
ton, 33 ; Howard, 56 ; Krause, 66 ; 
Reimoer, 88 ; Strand, 107 ; British 
Islands, Dallman, 25 ; Falconer, 39, 
40 ; Hirst, 52, 55 ; Hull, 58 ; Kew, 
61 ; Pickard-Cambridge, 85 ; Scandi- 
navia, Deichmann, 27 ; Strand, 103, 
105 ; Belgium and Switzerland, 
Borner, 15; Kries, 69 ; Mercanton, 
73 ; Strand, 105 ; Germany, Berlese, 
13, 14 ; Nalepa, 76 ; Strand, 105 ; 
Viets, 113, 114, 115, 116 ; Vitzthum, 
117; Russia, etc., Berlese, 13; 
Muller, 75 ; Italy and Spain, Ber- 
lese, 12, 13 ; Austria and S.E. Europe, 
Baudys, 4, 5, 6, 7, 8, 9, 10 ; Berlese, 
13, 14; Denier, 28; Fage, 37; 
Komarek, 62 ; Roewer, 96 ; Strand, 
106; Sardinia and Corsica, Berlese, 
13; Morton, 74. 
Asia and Malay Archipelago. — 
General, de Dalmas, 26 ; Roewer, 96 ; 
'Siberia, E mertoN, 33 ; Asia Minor, 
Strand, 106 ; Japan, Ewing, 34 ; 
Roewer, 94 ; Strand, 108 ; Siam, 
Strand, 103 ; East Indies, Ewing, 
34 ; Kopstein, 63 ; Nalepa, 76. 
Africa and Madagascar. — N. Africa 
and Egypt, Houard, 57 ; Strand, 
106 ; N.E. Africa, Berlese, 13 ; 
de Dalmas, 26; Strand, 107 ; East 
Africa, Berlese, 13, 14; de Dalmas, 
26; Lessert, 70; Roewer, 95; 
Vitzthum, 117 ; Central Africa, 
Strand, 101 ; West Africa, de Dalmas, 
26; Hansen, 47; Roewer, 95; 
Strand, 102, 110; South Africa, 
Berlese, 13; de Dalmas, 26; 
Hewitt, 50, 51 ; Madagascar, Strand, 
103. 
North America. — General, Cham- 
berlin, 21 ; Ewing, 36 ; Greenland and 
Canada, Emerton, 33; United States, 
Berlese, 13; Chamberlin, 20, 22; 
Ewing, 34; Garman, 43; Hirst 52; 
Kraatz, 64 ; Reese, 87 ; Ressler, 
90 ; Wells, 122 ; Wenninger, 123. 
Central and South America and West 
Indies. — Mexico, Berlese, 13 ; Her- 
rera, 49; Guatemala, Strand, 103; 
South America, Berlese, 13, 14 ; 
Carbonell, 19; Mello-Leitao, 71, 
72 ; Roewer, 94, 95 ; Strand, 103. 
Australasia.— Berlese, 13, 14; Col- 
ledge, 23 ; Froggatt, 41, 42. 
Atlantic. — de Dalmas, 26. 
Pacific. — Berlese, 13. 
