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X. Arachnida. 
Arachn. 7 
48. — Harvey, Elsie J. Isle of Wight 
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49. — Herrera, M. Los Escorpiones 
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50. — Hewitt, J. On some Lizards 
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51. — Hewitt, J. Notes on the Fauna 
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52. — Hirst, S. On three new Para- 
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53. — Hirst, S. On the mite ( Acarapis 
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Hist. London ser. 9 7 pp. 509-519 
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54. — Hirst, S. Notes on Parasitic 
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of Tracheal tubes in the families 
Sarcoptidae and Listrophoridae. B. Note 
on the two valid species of the genus 
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munis).. J. Quekett Microsc. Cl. 
London 14 1921 pp. 229-236 text-figs. 
55. — Hirst, S. On some new or little- 
known Acari, mostly parasitic in habit. 
Proc. Zool. Soc. London 1921 1921 
pp. 357-378 text-figs. 
56. — Houard, C. Galles d’Europe. 
Deuxi^me Serie. Marcellia Avellino 
17 1918 pp. 93-113. 
57. — Houard, C. Les collections 
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17 1918 pp. 114-136. 
58. — Hull, J. E. Some new mites. 
Vasculum Hexham 7 1921 pp. 17-20 
text-figs. 
59. — Jacobson, E. Thomisus de- 
cipicns (Forbes), a spider supposed to 
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schr. Ent. ’sGravenhage 64 1921 
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60. — Joan, Teresa. Caso de ginan- 
dromorfismo en una Garrapata (4m- 
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Buenos Aires 1916 1919 pp. 421-425 
pi. xlii. 
61. — Kew, H. W. Chelifer scorpioides 
Herm., a false-scorpion new to the 
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62. — Kom&rek, J. Zur Hydracarina- 
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Arch. Hydrobiol. Stuttgart 13 1921 Hft. 
2 pp. 299-306 text-figs. 
63. — Kopstein, F. Die Skorpione des 
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Meded. Leiden 1921 1921 deel vi pp. 
115-114 text-figs. 
64. — Kraatz, W. C. A preliminary 
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21 1921 pp. 137-182. 
65. — Krausse, A. “ Milchtrinkende ” 
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66. — Krausse, A. Zur Kenntnis der 
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168. 
67. — Krausse, A. tlber einige ein- 
heimische Mause und einige bei 
Mausen gefundene Milben. Arch. 
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162. 
68. — Krausse, A. Eine neue Borken- 
kafermilbe, Calvolia kneissli m. von 
Orthotomicus laricis Fabr. Arch. natg. 
Berlin 83 A Hft. 10 1919 pp. 123-124 
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69. — Kreis, H. A. Die Joriseen und 
ihre postglaziale Besiedelungsges- 
chichte. Eine faunistich-biologische 
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zig 9 1920 Hft. 3 pp. 241-288 ; 1921 
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70. — Lessert, A. de. Araignees du 
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pp. 381-442 text-figs. 
71. — Mello-Leitao. On the genus 
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