1G A rack u. 
XI. Arachnida. 
[1920] 
Special. 
Buccal Apparatus, Tardigrada ; Bau- 
mann, 5. 
Maxillae, Mandibles, Eylais larva 
Hydrach.) ; Koenike, 72. 
Eyes, Leber tia (Hygrobat.) ; Koenike, 
69. 
Capitulum, Psoroptes (Acar.) ; Bux- 
ton, 15. 
Histology of Nerve endings in muscle, 
Tegenaria (Aran.) ; Brites, 13. 
• Male and Female Genital organs, 
Rhizoglyphus (Acar.) ; Foa, 44. 
Spermatozoa, Tardigrada ; Baumann, 
5. 
PHYSIOLOGY. 3011. 
Food, quantity eaten by spiders ; 
Bilging, 8. 
Regeneration, mouth parts and legs, 
Ticks ; Nuttall, 86. 
Physiological effects due to poison 
of Centrums (Scorp.) ; Ochoterena, 87. 
Cardiac pulsation, Araneae ; Willem 
& Bastert, 126. 
DEVELOPMENT. 3015. 
Spermatogenesis, Ixodes ricinus ; 
Nordenskiold, 84. 
Hypopus of Carpoglyphus anonymus 
(Tyroglyph.) ; Morris, 81. 
Life history, Sarcoptes scabiei { Acar.) ; 
Warburton, 124. 
Zur Ontogenie der stomodealbriicke ; 
Holmgren, 63. 
ETHOLOGY. 3019. 
General. 
Habits Acari ; Supino, 114 ; Tyro- 
glyphidae ; Chapman, 21 ; Dermacentor 
venustus (Ixod.) ; Parker, 89 ; Neos- 
conia salaeria (Aran.) ; Chamberlin, 18 ; 
Feeding, Araneae ; Bilging, 8 ; Nesting, 
Nemoscolus waterloti (Argiop.) ; Ber- 
land 7 ; Relation of Halictus (Hy- 
menop.) to Lycosa (Aran.) in nesting- 
habits ; Johnson, 67 ; Spinning, Chilean 
Araneidae ; H. E. C., 55 ; Spinning, 
Epeiridae ; Hingston, 57. 
Sinneshaare, Araneae ; Dahl, 25. 
Habitats. 
Littoral, Acari ; Halbert, 53. 
In lizard’s burrofa, Damon annula - 
tipes (Pedipalp.) ; Pead, 91. 
In Termites’ nest, Arachnida ; Sil- 
vestri, 109. 
Parasitism and Symbiosis (see also 
Economics). 
On Mammals — Sarcoptmae (Acar .) ; 
Warburton, 124; On Man, Hyletastes 
missouriensis (Gamas .) ; Ewing, 37 ; 
On Rhesus monkey ; Acari ; Duncan, 
33 ; On rodents ; Gamasoidea (Acar.) ; 
Ewing, 36 ; On Sheep — Mites and 
Ticks ; Hall, 54 ; On domestic mam- 
mals, Ixodidae ; Senevet, 107 ; Yaki- 
moff, 128. 
On birds, Sarcoptinae (Acar.) ; War- 
burton, 124 ; Acari ; Hirst, 58. 
Commensal of water-beetles, Eylais 
(Hydrach.) ; Koenike, 71. 
Theridion denticulatum (Therid.), 
parasitised by Ichneumon ; Morley, 80. 
Spiders parasitised by Gordius 
(Nomat.) ; Smith, 110. 
Plant galls and orchard pests vide 
Economics. 
Miscellaneous. 
Colouration, Ixodoidea ; Nuttall, 85. 
Longevity, Argas reflexus (Ixod.) ; 
Lieahart & R6my, 74. 
VARIATION AND AETIOLOGY. 
3023. 
V ariation, Teratology. 
Polymorphism, Secondary sexual 
characters, Rhizoglyphus (Acar.) ; Foa, 
44. 
Malformation, ticks ; Robinson, 101. 
Hermaphrodite Gongylidium gra- 
minicola (Arach.); Deichmann, 30. 
Phytogeny. 
Arachnida, relation to Trilobites ; 
Raymond, 98. 
Heredity. 
Mendelian inheritance, Rhizogly- 
phus i Foa, 44. 
