16 Araclin. 
XI. Arachnida. 
[1916] 
STRUCTURE. 3007. 
General. 
Trithyreus ( Pedip .) ; Hilton, 39. 
Special. 
Hypostome, Acari ; Oudemans, 87 : 
Midgut, Araneae ; Hamburger, 35 : 
Lung-books, Araneae ; Roberts, 101 : 
Tracheae, Sarcoptidae ; Trouessart, 
116 : Male genital organa Scorpiones ; 
Pavlovsky, 91, 92. 
PHYSIOLOGY. 3011. 
Movements of heart and respiration, 
Spiders ; Willem, 124. 
Reactions, Trithyreus (Pedip.) ; 
Hilton, 39. 
Toxins, Araneae ; Houssay, 45 ; 
Ldvy, 65, 66. 
DEVELOPMENT. 3015. 
(Breeding Habits, &c., see Ethology). 
Spcrmatogenosis, Scorpiones ; Wilson, 
126 : Araneae ; Painter, 89. 
Dev. of Sternum, Scorpiones ; 
Petrunkevitch, 94 : Male genital organs, 
Scorpiones ; Pavlovsky, 91, 92. 
Larval Acari ; Oudemans, 83 : Trom- 
bidiidae; Miyajima and Okumura, 69, 
70 : Hydrachnidae ; Piatakov, 95, 96. 
i. ETHOLOGY. 3019. 
General. 
Araneae ; Comstock, 18: Avicula- 
riidae ; Cruden, 22 : Tegenaria 
( Agelen .) ; Savory, 105. 
Breeding Habits, &c. 
Proportion of sexes, Uloborus ; 
Girault, 28. 
Copulation, Dictyna ; Borland, 7. 
Drumming, Pisaura mirubilis ; Prell, 
97. 
Egg-saos, Arachnura (Argiop.) ; 
Rainbow, 99. 
Habitats. 
Cavernicolous, Pedipalpi ; Annan- 
dale and Gravely, 1 : Arachnida ; Lebe- 
dinskij, 63 : Ixodidae ; Neumann, 77. 
Spiders on snow ; Grese, 34 : 
Between tide-marks ; Arndt, 2. 
Parasitism and Symbiosis (see also 
Economics). 
On Mammals, Acari ; Hirst, 43 : 
Romano vid and Radkovskij, 102 : 
Psoroptes ( Sarcopt .) ; Ward, 121. 
On Birds, Acari ; Hirst, 42, 43. 
On Diptera, Oamasidae, Pseudoscor- 
piones ; Graham-Smith, 80. 
Myrmecophile Acari ; Oudemans, 
81. 
Plant Galls vide Eriophyidae. 
Miscellaneous. 
Colour, Araneae ; Moles, 72 : 
Lathrodectes ( Therid .) ; Moritz, 73 : 
Coloration and attitudes, Scorpiones ; 
Pawlowsky, 93. 
Webs, Dictyna and Filistata ; Bor- 
land, 7. 
Springende Acari ; Oudemans, 87. 
VARIATION AND AETIOLOGY. 
3023. 
Phylogeny, Scorpiones ; Petrun- 
kevitch, 94. 
Evolution, Aviculariidae ; Gravely, 
31 : Indo -Australian Thelyphonidae 
(Pedip .) ; Gravely, 32. 
DISTRIBUTION. 
Geographical. 3027. 
General. 
Records of distrib., Ixodidae ; 
Nuttall, 78. 
Palaearctic Araneae ; Strand, 109. 
Indo - Australian Thelyphonidae 
(Pedip.) distrib. ; Gravely, 32. 
Europe and Mediterranean 
Islands. d 
Opiliones ; M idler, 74 : Acari ; 
Berlese, 8, 10 : Oudemans, 84, 86 : 
Hydrachnidae ; Thor, 114. 
Sweden, Araneae ; Johansson, 51 : 
Hydrachnidae ; Aim Ark. Zool. Stock- 
holm 10 No. 18, 1916 p. 22. 
Russia, Hydrachnidae ; Thor, 113 : 
Sarcoptidae ; Romanovid and Radkov- 
skij, 102 : Nijnij Novgorod, Araneae ; 
Grese, 33 : Kiev, Hydrachnidae ; 
Goldfeld, 29 : Yaroslav, Araneae ; 
Fedotov, 26 : Crimea, Arachnida ; 
Lebedinskij, 63. 
