[1921] 
X. Arachnida. 
Arachn. 21 
Cheletes Venator sp. n. E. Africa 
p. 2 text- figs., Vitzthum Arch. Natg. 
Berlin 84 A Hft. 6. 
Cheletomimus Oudemans = Gheyletia 
Haller p. 359, Oudemans Ent. Ber. 5. 
Gheletophanes peregrinus sp. n. Italy 
p. 194, Berlese Redia 14. 
Cheletophyes vitzthumi p. 6 text-fig., 
Vitzthum 117. 
Gheyletia vide Cheletomimus. 
Gheyletus erudilus p. 10 pis. ii-vi, 
Newstead & Duvall 77 ; p. 23 pi. 
viii, Newstead & Morris 78. 
Ghromotydaeus nitidus S. America 
p. 192, columbiae Columbia (N.A.) p. 
193 spp. n„ Berlese t.c. 
Dinothrombium purpureum p. 3, 
klugkisti p. 6 text-figs., Oudemans 81. 
Erythraeus allaudi E. Africa, italicus 
Pisa, ursinus Chili p. 209, eucomus 
Germany, decalvatus Germany p. 210 
spp. n., Erythrolophus subg. n. frogatti 
sp. n. Australia p. 210, Berlese 
Redia 14. 
Erythrolophus subg. n. of Ery- 
thraeus q.v. 
Geckobiella, Hirstiella subg. n. p. 
194, trombidiij’ormis sp. n. Mexico 
p. 195, Berlese Redia 14. 
Hirstiella subg. n. of Geckobiella 
q. v. 
Leptus ( Trombicula ?) similis sp. n. 
Texas p. 37, Hirst Ann. Mag. Nat. 
Hist. ser. 9 7. 
Micrereunles nom. n. for Ereynetes 
preoco. p. 4, Trouessart & Berlese 
Redia 14. 
Nanorchestes vide Speleorchestes. 
Notophallus bicolor sp. n. New South 
Wales p. 33 figs., Froggatt Agric. Gaz. 
Sydney 32. 
Oligonychus americanus Saskatche- 
wan, major Maryland spp. n. p. CGO 
pi. cxxv, Ewing Proc. U.S. Nat. 
Mus. 59. 
Pediculoides formicarum p. 3, Vitz- 
thum 119. 
Pigmephorus morrisii sp. n. Hert- 
fordshire p. 17 text-fig., Hull Vas- 
culum 7. 
(N-17041 n) q 
Pseudotar sonemoides gen. n. near 
Tarsonemoides p. 72, eccoptog aster is 
sp. n. Austria p. 73 text-figs., Vitz- 
thum Arch. Natg. Berlin 87 A Hft. 4. 
Psorergates p. 372, Hirst 55. 
Pygmephorus tarsalis sp. n. England 
p. 374, americanus p. 375, americanus 
var. socotrensis var. n. Socotra p. 376, 
text-figs., spinosus p. 377, pilosus p. 
378, Hirst Proc. Zool. Soc. London 
1921. 
Rhaphignatlius viridis sp. n. Illinois 
p. 663 pi. cxxv, Ewing Proc. U.S. 
Nat. Mus. 59. 
Schongastia americana sp. n. Texas 
p. 37, Hirst Ann. Mag. Nat. Hist, 
ser. 9 7. 
Speleorchestes ventriosus sp. n. Surrey 
p. 373, key to spp. of Nanorchestes 
and Speleorchestes p. 373, Hirst Proc. 
Zool. Soo. London 1921. 
Stereotydaeus ( Tectopenthdlodes ) pal- 
palis sp. n. La Plata p. 193, Berlese 
Redia 14. 
Syncaligus tridentifer Minnesota p. 
664, quercus New York p. 665 spp. n. 
pi. cxxv., Ewing Proc. U.S. Nat. 
Mus. 59. 
Tarsonemus woodi sp. n. Grt. Britain 
p. 769 pi. lii, text-figs., Rennie Trans. 
R. Soc. Edinburgh 52 ; T. sp. ? p. 
26 text-figs., Dickson J. Trop. Med. 
London 24 ; vide also Acarapis. 
Tenuipalpus palmatus var. simplex 
var. n. Weimar p. 8, Vitzthum Arch. 
6. Natg. Berlin 84 A Hft. 
Tetranychina tritici sp. n. Idaho p. 
665 pi. cxxv, Ewing Proc. U.S. Nat. 
Mus. 59. 
Tetranychus telarius p. 131 text- 
fig., Froggatt 42. 
Trombicula key to spp. p. 389, 
coarctata p. 382, splendens p. 386, 
cinnabaris sp. n. Virginia p. 387 text- 
figs., Ewing Ann. Ent. Soc. Amer. 13. 
Trombidium pygiacum p. 1 text- 
figs., Oudemans 81. 
Bdellidae. 
Scirus norvegicus p. 2, Vitzthum 
119. 
a 18— 2 
