[1922J 
X. Arachnida. 
Arachn. 15 B 
Technique. — Dessication experiments, 
Tardigrada ; Baumann, 10 ; Control 
of Mites in fungus cultures ; Jewson 
<fc Tattersfield, 116 ; Nervous system; 
Hanstrom, 94 ; Musculature, Araneae ; 
Lendl, 124 ; Copulatory apparatus, 
Araneae ; Osterloii, 165. 
Collections, Expeditions. — Deutsch. 
Entom. Inst., Oribatidae ; Sellnick, 
209; Nat. Museum, Budapest, Opi- 
liones ; Roewer, 200 ; Araneae ; Szom- 
bathy, 235 ; Mus. Hist. Nat., 
Valencia, Myriapoda, Arachnida ; Gar- 
cia, 82; of Simon, Reimoser, Indian 
Museum, Opiliones ; Roewer, 201 ; 
Indian Mus., Pentastomids ; Hett, 
100 . 
Economics (see also Parasitism). — 
Arachnids in arable soil ; Morris, 153. 
Pests : — Vine ; FerraNt, 78; Fruit; 
Frost, 81 ; Grain, and Tyroglyphus 
mycophagus ; Schulze, 207. 
Mites in bee disease ; Bullamore, 
36; Rennie, 191. 
Toxic effect of Pyridine on Mites ; 
Jewson & Tattersfield, 116; Con- 
trol of “ red spider ” ; Parker, 171 ; 
Tyroglyphus mycophagus, methods of 
destruction ; Schulze, 208. 
'l’icks carrying Egyptian fever of 
cattle; Mason, 146; Mites on soldiers 
in field ; Pouillade, 182 ; Sarcoptes 
scabei var. equi attacking Man ; Mac- 
dougall, 130; Spider venom danger- 
ous to life ; Houss ay & Negrete, 109; 
Effect of Poison, Tarantulas ; Baerg, 5. 
Treatment of Sarcoptes on Man ; 
Grosz, 92. 
STRUCTURE. 
General. — Hydracarina ; Soar, 222 ; 
Tardigrada ; Heymons,' 101 ; Astaco- 
crolon ; Haswell, 97 ; Proctophyl- 
lodes ; Vitzthum, 250 ; Ext. struct., 
Lipliisiius ; Savory, 205. Scorpions ; 
Birula, 15; Alofia ginae; Giglioli, 
86 . 
Int. structure, Alofia ginae ; Gig- 
lioli, 86. 
Special. — Body region, Eriophyidae 
and Tetranychidae ; Ewing, 71 ; Pedi- 
palpi, Araneae, Acari ; Roberts, 
199 ; Appendages. — Proctophyllodes 
(Acar.) ; Vitzthum, 250 ; Mouth- 
parts, gall- mites and Phy top ti palpus 
transitans, Ewing, 71 ; Tarsonemidae ; 
Ewing, 72 ; Tarsal armature, gall- 
mites and Phytoptipalpus , Ewing, 71 ; 
Spinnerettes, Araneae ; Buczk6, 35. 
Copulatory organs, Araneae ; Ger- 
iiardt, 84; Osterloh, 165; Szom- 
bathy, 234 ; Scorpio ; Pawlowsky, 
174 ; Semina] vesicles, Araneae ; Ger- 
iiardt, 85. “ Brain,” nervous system, 
optic ganglia, Scorpionidea, Phalan- 
gidae ; Hanstrom, 94 ; Araneae, 
Opiliones, Pedipalpi, Solifugae, Cher- 
netidae, Acari ; Hanstrom, 96 ; Lyri- 
form organs etc., Aranea sp. ; Vogel, 
252. Circulatory system, Scorpions ; 
Pawlowsky, 173 ; Respiratory organs, 
scorpions ; Dahl, 63 ; Musculature, 
spiders ; Lendl, 125, 126 ; abdominal. 
Spiders ; Szombathy, 233 ; Poison 
gland, Tarantula; Baerg, 5 ; Egg, 
larval stages, Ornithodorus ; Cunliffe, 
62 ; Colouration ; Water-mites ; El- 
ton, 75. 
Histology. — Tardigrada ; Baumann, 
10; Sense organs, Aranea sp. ; Vogel, 
252 ; Visual organs, Araneae ; Han- 
strom, 95 ; Muscle -fibres ; Lendl, 
124; Szombathy, 233; Plain muscle, 
spiders ; Lendl, 125 ; Circulatory 
system, Scorpions ; Pawlowsky, 173 ; 
copulatory apparatus, Araneae ; Oster- 
loii, 165 ; Copulatory organs, Araneae ; 
Szombathy, 234. 
PHYSIOLOGY. 
Biochemistry of digestion, Scorpi- 
onida ; Sarin, 204 ; Excretion, diges- 
tion, Astacocroton ; Haswell, 97 ; 
Excretion of blood by coxal orifice, 
Argasidae ; Remy, 190; Encystment, 
resistance to change of conditions, 
Tardigrada; Rahm, 186; Muscle 
action, Araneae ; Lendl, 124 ; Pec- 
tines, Scorpionidae ; Ubisch, 239 ; 
Copulation, Araneae ; Gerhardt, 84 ; 
Osterloh, 165 ; Szombathy, 234 ; 
Seminal vesicles, Araneae ; Gerhardt, 
85. 
DEVELOPMENT. 
Hydracarina ; Soar, 222 ; Tardi- 
grada ; Loman, 127 ; Argas persicus ; 
Zuelzer, 270 ; Copulatory organs, 
Araneae ; Szombathy, 234. 
Oogenesis, Maturation of ovum, 
Linguatulidae ; Haffner, 93. 
