20 Arachn. 
XI. Arachnida. 
[1911] 
Viets, K. Zwei ncue Hydracarinen 
aus dein Genus Thy as Koch. Zool. 
Anz. Leipzig 38 1911 (332-333). 204 
Viets, Karl. Nouo Wassermilbon 
aus Kamerun. Zool. Anz. Leipzig 38 
1911 (492-495). 205 
Viets, K. Eine Aenderung in der 
Hydracarinen-Nomenklatur. Zool. Anz. 
Lepizig 38 1911 (p. 504) 206 
Viets, Karl. Hydracarinologische 
Beitrage. iv [einheimische] u. v 
[afrikan. Formen]. Bremen Abh. 
natw. Ver. 20 1911 (339-360). 207 
Viets, Karl. Beitrag zur Kenntnis 
der Hydracarinen Holsteins. Arch. 
Hydrobiol. Stuttgart 6 1911 (297- 
306). 208 
Walter, C. Hydracarina der Aru- 
Inseln. Frankfurt a. M. Abh. Senckenb. 
Ges. 34 1911 (207-222) 2 Taf. 209 
Warburton, C. vide Nuttall, G. H. F. 
Weldon, George P. Two common 
orchard mitos. Tho brown mite. 
The rod spider. Agric. Exp. Sta. 
Colorado Agricultural College Fort 
Collins Bull. No. 152 1909 (1-12). 210 
Werner, Franz. Scorpions and 
allied Annulated Spiders of the Anglo- 
Egyptian Sudan. Rep. Wellcome 
Tropical Research Laboratories Gordon 
Memorial College Khartoum London 
4 B 1911 (179-194) pis. xiv and xv. 211 
Wheeler, William Morton. Pseudo- 
scorpions in ant nests. Psyche Boston 
18 1911 (166-168). 212 
Wills, L. J. On the fossiliferous 
Lower Keuper Rocks of Worcester- 
shire, with descriptions of some of 
tho plants and animals discovered 
therein. London Proc. Geol. Ass. 21 
pt. 5 1910 (249-331) pis. x-xxvi. 213 
Wilson, II. F. Notes on the red 
spider attacking cotton in South 
Carolina. J. Econ. Ent. Concord. 
N. II. 4 1911 (337-339). 214 
Windle, Francis. The bulb mite. 
( Rhizoglyphus hyacinthi Boisd., Syn. 
Rhizoglyphus echinopus Michael) also 
known as the “ Eucharis Mite.” J. 
Econ. Ent. Concord. N. H. 4 1911 (127— 
129). 215 
Yakimov, L. et Kohl-Yakimov, Nina. 
Etude des Ixodid^s de Russie. Arch, 
parasit. Paris 14 1911 (416-425). 216 
Yakimov vide etiam Jakimov. 
Zykoff, W. Zur geographischen 
Verbroitung von Oaleodes ca spins Bir. 
Zool. Anz. Leipzig 37 1911 (543-544). 
217 
II.— SUBJECT-INDEX. 
GENERAL ECONOMICS. 3003 
Biography. 
Ludwig Koch; Dittrich, 35. 
Bibliography. 
Jahresbericht fiir 1907 ; Strand, 
188: fiir 1909; Strand, 189. 
Literature for 1910 on behavior of 
spiders ; Turner, 200. 
Bibl. of American Araneae ; Petrun- 
kevitch, 140: of Ixodoidea \ Nuttall, 
Robinson & Cooper, 126. 
Work of Saville-Kent on British 
llydrachnidae ; Soar, 179 : Saville- 
Kent, 166. 
General Works. 
Gen. account of Scorpiones, Pedi palpi, 
Solifugae; Werner, 211 : of llydra- 
chnidae ; Saville-Kent, 166. 
Collections, etc. 
British Museum Guide to fossil 
Arachnida ; Bather, 9. 
Nomenclature, etc. 
Nomenclature of Ixodoidea ; Stiles, 
181. 
Namen fiir Korperabschnitte der 
Acari; Oudemans, 131. 
Technique. 
Fang u. Konservierung der Hydrach- 
niden; Koep, 94. 
Economics (see also Parasitism, p. 22). 
Arachnida in relation to disease; 
Alcock, 1 : Parasitic Arachnida ; 
Brumpt, 26 : Neveu-Lemaire, 119 : 
Monograph of Ixodoidea continued ; 
Nuttall & Warburton, 126 : Revision 
