12 Arachii. 
Xi. Arachnida. 
[1919] 
Trouessart, E. e Berlese, A. Generi 
nuovi di Acari. Redia Firenze 14 
1919 (p. ? ). 64 
Vandely A. Contribution 5, la con- 
naissance do la faune des eaux douces 
du Jura. Paris Bull. Soc. 2iool. 44 
1919 (80-94). 65 
Versluys, J. Die Kiemen von 
Limulus und die Lungen der Arach- 
niden. Amsterdam Bydr. Dierk 21 
1919 (41-48) text-figs. 66 
Vitzthum, H. Neue myrmecophile 
Milben. Zool. Anz. Leipzig 50 1919 
(188-192) text-figs. 67 
Walter, C. Neue Hydracarinen aus 
Surinam. Zool, Anz, Leipzig 50 1919 
(257-265) text-figs. 68 
Walter, C. Hydracarinen aus den 
peruanischen Anden und aus Brasilien. 
Rev. suisse Zool. Geneve 27 1919 
(19-59) text-figs. 69 
Walter, C. Schweizerische Siiss- 
wasserformen der Halacariden. Rev. 
suisse Zool. Geneve 27 1919 (235- 
242) text-figs. 70 
Wesenberg-Lund, C. Furesostudier. 
En bathymetrisk - botanisk - zoologisk 
Undersogelse af Molleaaens Soer. 
Kapitol vi. Furesoens Bundfauna. 
Kobenhavn K. Danske Vid. Selsk.-Skr. 
Rack, viii 8 1919 (135-178). 71 
Wesenberg-Lund, C. Contributions 
to the knowledge of the postembryonal 
■development of the llydracarina. 
Kobenhavn Vidensk. Medd. Nat. Foren. 
70 1919 (5-57). 72 
Willem, V. De bewegingen van het 
hart en de ademhalingsbewegingen by 
twee soorten spinnen, [Les mouve- 
ments du coeur et les mouvements 
respiratoires do deux especes d’araig- 
n6es,] Amsterdam ^Vcrk. Gen. Nat. 
Genees. Heelk. 8 1917 (p. 624). 73 
Willem, V. et Bastert, C. Essais 
d’inscription des pulsations cardiaques 
chez une araignee. Haarlem Arch. 
Neerl. de Physiol. Ser. ITIc des Arch. 
Neerl. 2 1917 (285-289) 3 lig. 74 
Yagi, N. Preliminary note on the 
life-period of the Bulb-mite, Rhizogly- 
^hus echinofua. Bor. Oliara Inst, 
landwirtsoh. Forsoh. Kuraschiki 1 
1918 (349-360) pi. vii text-figs. 75 
II.— SUBJECT-INDEX. 
N.B. — The number in Clarendon, when 
not that of a Volume, refers to the 
list of Titles. 
GENERAL, ECONOMICS. 3003. 
General. 
Methods of study, Eriophyidae ; 
Nalepa, 49. 
Economics (see also Parasitism). 
Poison of Mastigoproctus (Pedip) ; 
Howard, 38. 
Chigger-mites (Trombid.) of man and 
animals ; Ewing and Hartzell, 23 : 
Transmission of Sarcop.es from animals 
to man ; Frisch, 29 : Demode:c in man 
and animals ; Hirst, 36 : Ixodes on 
conjunctiva of man ; Killerich, 39 : 
Sarcoptes in man ; Munro, 48 : 
Tsutsugamushi disease {Trombicula) ; 
Hatori, 31 : Akamushi, Transmission 
of disease by Acari; Teodoro, 61. 
Cattle - fever tick, Margaropus 
{Ixod.) ; Ellenberger and Chapin, 19 : 
Sarcoptes on horse ; Hausen, 30 : 
Fowl tick, Argas {Ixod.) ; Bishopp, 9. 
Acari destructive to agric. in Dutch 
East Indies ; Dammerman, 18 : Mil- 
benangriffe auf Tee, Kina ; Bernard, 
Kerbosch, 8a. 
Red Spiders {Tetranychidae) ; 
McGregor, 43: Bulb-mite {Hhizogly- 
phus) ; Yagi, 75. 
STRUCTURE. 3007- 
Solifugae ; Hewitt, 34 ; Demodex ; 
Hirst : Tardigrada ; Loman, 42. 
Metatarsal comb, Drassidae ; 
Berland, 4. 
Lungs of Arachnida ; Versluys, 66. 
Sexual dimorphism, Opiliones ; 
Muller, 46. 
PHYSIOLOGY. 3011. 
Movements of heart and respiration 
Araneae; Willem, Z3: of heait, Araneae; 
Willem k Bastert, 74. 
DEVELOPMENT. 3015. 
Post-embryonal dev., Ilydrach- 
nidae ; Wesenberg-Lund, 72,. 
