15 Arachn. 
Subject Index. — Structure. 
3007 
Viets, K. Hydracarinen aus nord- 
deutschon und schwedischen Quellen. 
Arch, hydrobiol. Stuttgart 12 1920 
(803-814). 1^20 
Viets, K. Hydracarinologische Bei- 
trage. IX. Neue und wenig bekannte 
Arten. X. Hydracarinen aus Spanien. 
Bremen Abh. natw. Ver. 24 1919 (1-24) 
text-figs. 121 
Viets, K. Zwei selten gefundene 
nordeuropaischo Hydracarinen auch 
in Deutschland. Zool. Anz.- Leipzig 
51 1920 (303-304). 122 
Voeltzkow, A. Flora und Fauna 
der Comoren. in Voeltzkow, Roiso in 
Ostafrika in den Jahren 1903-1905. 
Wiss. Ergeb. 3 1917 (478). 123 
Warburton, C. Sarcoptic Scabies 
in man and animals. A critical survey 
of our present knowledge regarding the 
Acari concerned. Parasitol. Cambiidge 
12 1920 (265-300) pi. xv figs. 124 
Werner, F. Dber einige Skorpione 
und Gliederspinnen des Naturhistori- 
schen Museums in Wiesbaden. Wies- 
baden Jahrb. Ver. Natk. 69 1916 (79-97) 
125 
Willem, V. and Bastert, C. Essais 
d’inscription des pulsations cardiaques 
chez une araignee. Haarlem Arch. 
Neerl. Sci. Soc. Holl. Ser. Ill 2 1917 
(285-289) text-figs. 126 
Williamson, W. vide Soar, C, D, 
Willman, C. Diagnoson einiger 
neuer Oribatiden aus der umgegend 
Bremens. Bremen Abh. naturw. Ver. 
24 1920 (552-554) text-figs. 127 
Yakimoff, W. L. Les Tiques des 
animaux domestiques du Turkestan 
russe. Paris Bui. soc. path. exot. 10 
1917 (293-301). . 128 
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. 
Swedish Arachnid literature 1916-17 ; 
Ahlunder, 1 ; Arachnida of African- 
Lflkes ; Cunnington, 24 ; Works of 
Rainbow, W. J. ; Musgrave, 82. 
Nomenclature. 
Blackwall’s spp. G. Britain and Ire- 
land ; Hull, 65. 
Collections, Expeditions, etc. 
Wiesbaden Museum, Scorpiones, Pedi- 
palpes, Solifvgae ; Lampe, 73. 
Chevert,” Trap-door spiders ; 
Rainbow, 97. 
Technique. 
Experimental infection with relapsing 
fever by means of ticks ; Hindle, 56 
Ticks, preservation of colouration : 
Nuttall, 85. 
Experiments in regeneration, Ticks ; 
Nuttall, 86. 
Economics (see al.sj Parasitism). 
Rhizoglyphus (Acar.) ; Foa, 44 ; 
Eriophyidae (Acar.) in Br. Columbia ; 
Glendenning, 51. 
Arachnida dangerous to man ; Hirst, 
59 ; Acari carrying human disease ; 
Chandler, 20 ; Ornithodorus moubata 
(Ixod.) transmitting relapsing fever ; 
Hindle, 56 ; Transmission of recurrent 
fever by Ornithodorus turicala (Ixod.) ; 
Tejera, 115. 
Control of Dermacentor venustus 
(Ixod.) ; Parker, 89. 
Accidental infection of man by 
nymph of Loelaps stabularis (Acar.) ; 
Desoil, 32. 
Mites and Ticks on Sheep ; Hall, 54 ; 
Mites causing Hog mango ; Imes, 66 ; 
Ticks and Mites on Poultry ; Rentoul 
& Clinton, 100. 
Spiders destroying larvae of Sphin- 
gidae (lepid.) ; Fraser, 46. 
Mites in flour ; Chapman, 2t ; Erio- 
phyidae (Blister Mites in orchards) ; 
Froggatt, 47 ,* Paratetranychus attack- 
ing apple ; Frost, 48 ; Mites on Fruit 
and Hops ; Fryer, 49 ; Mites causing 
“ Tambera ” disease of potato ; Mann, 
Nagpurkar, Kulkarni, 75 ; Mites attack- 
ing seeds ; Siggaard, 108. 
STRUCTURE. 3007. 
General. ' 
Leber tia (Hygrobat.) ; Koenike, 69 ; 
Thy as (Hydrach.) ; Koenike, 70 ; 
Centrurus exilicauda (Scorp.); Ocho- 
terfcna, 87 
