11 Arachn. 
Subject Index. — Arachnida. 
3019 
Walter, C. Beitrag zur Kenntnis 
der Entwicklung bachbewohnender Mil- 
ben. Basel Verh. Natf. Ges. 28 1917 
Teil 2 (148-164). 88 
Weidman, F. D. Cytoleichus pen- 
rosei, a new arachnoid parasite found 
in the diseased lungs of a prairie dog, 
Cynomys ludovicianus. J. Parasitol. 
Urbana 111. 3 1916 (82-89) 2 pis. 89 
Willcocks, F. 0. Notes on some 
injurious and beneficial mites found in 
Egypt. Bull. Soc. Ent. Egypte Le 
Caire 1913 1914 (15-18). 90 
Willcocks, F. C. An Acarine parasite 
of the Pink Bollworm, Pediculoides 
ventricosus. Bull. Soc. Ent. Egypte 
Le Caire 1913 1914 (68-72). 91 
Willem, V. Observations sur la 
circulation sanguine et la respiration 
pulmonaire chez les araign^es. Haar- 
lem Arch. N6erl. de physiol. 1 1917 
(226-256) fig. 92 
Williamson, W. Water Mites. Scot. 
Nat. Edinburgh 1917 1917 (37-47) 
figs. 93 
Williamson, W. A rare Hydra - 
carid Lebertia densa, Koen. Scot. 
Nat. Edinburgh 1917 1917 (271-274) 
figs. 94 
Wood, H. P. The chicken mite : 
its life history and habits. Washington 
1). C. Bull. U. S. Dept. Agric. Div. 
Ent. 553 1917 (14 pp.) figs. 95 
II.— SUBJECT-INDEX. 
N.B. — The number in Clarendon , when 
not that of a Volume , refers to the 
list of Titles. 
GENERAL, ECONOMICS. 3003 
Bibliography. 
Sweden ; Ahlander, 1, 2, 3. 
Economics (see also Parasitism). 
Acari ; Banks, 9 : Willcocks, 90. 
Arach. injurious to man ; Hirst, 
43 : Tick-bites ; McCaffrey, 56 : 
Poisonous spiders ; Catalan, 16: Effects 
of poison of Araneae ; Kellogg, 51. 
Ear tick in cattle ; Herms, 38 : 
Tick paralysis ; Todd, 82. 
Ixodidae, Piroplasma, Crawley, 22 : 
Arsenical dips for Ixodidae ; Gray bill, 
34. 
Chicken Mite ( Dermanyssus ) ; Wood, 
95. 
Pediculoides {Acari) Egypt ; Will- 
cocks, 91. 
Phytophagus Acari ; Ewing, 31 : 
Mites on crops in Utah ; Doane, 25 : 
Tetranychus on Cotton ; McGregor & 
McDonough, 58 : Eriophyidae on 
Apple ; Brittain, 13. 
Cheese mites ; Eales, 26. 
STRUCTURE. 3007. 
General. 
Hydrachnidae ; Williamson, 93. 
Special. 
Abdomen, Araneae ; S0rensen, 80. 
Central Nervous Syst., Arachnida ; 
Buxton, 14 : Brain ; Holmgren, 49. 
Trichobothria and other sense organs, 
Arachnida ; Hansen, 35 : Eyes; Holm- 
gren, 49. 
Coxal glands, Pedipalpi, Solifugae, 
Palpigradi ; Buxton, 14. 
Male genital apparatus, Scorpiones ; 
Pawlowsky, 72. 
PHYSIOLOGY. 3011. 
Circulation, respiration, Araneae ; 
Willem, 92. 
Olfactory sense, Stasimopus (Avi- 
culariid.) ; Hewitt, 42. 
DEVELOPMENT. 3015. 
(Breeding Habits, &c., see Ethology.) 
Spermatogenesis, Argas ( Ixod .) ; 
Casteel, 15. 
Dev. Hydrachnida ; Walter, 88 : 
Larvae, Oamasidae ; Hull, 50. 
ETHOLOGY. 3019. 
General. 
Habits, Stasimopus ( Aviculariid .) ; 
Hewitt, 42: Theridiidae ; Nielsen, 
65 : Lycosidae ; Criddle, 23 : Derma- 
nyssus (Gamas.) ; Wood, 95. 
