THE RED SPIDER ON COTTON. : a 
rainfall, and temperature between these coastal and inland zones 
probably explains the restriction of occurrence. 
CLASSIFICATION AND SYNONYMY. 
Owing to the extreme minuteness of red spiders generally, to 
marked variations due to age, host plant, environment, or other 
causes, and to the microscopic characters which are employed in the 
taxonomic treatment of the group, the spinning mites have afforded 
much speculation among specialists and have caused considerable 
duplication and confusion of names. 
_ Ewing has published his opinion that 7. bimaculatus Harvey, T. 
secmaculatus Riley, and T. glovert Banks are identical with T. tela- 
rus. The final settlement of this question will be possible only after 
a careful comparative study has been made of material collected from 
the localities and hosts recorded for the respective European species. 
The following list represents the synonymy of the original European 
red spider (T. telarwus) as claimed by various workers since Linnzeus, 
chiefly for the purpose of indicating the present confusion in the 
eroup. 
TETRANYCHUS TELARIUS L. 
1761. Acarus telarvus L.; 1804, Trombidium t. Herm.; 1834, Tetranychus t. Dugés. 
1804. Trombidium tiliarium Herm.; 1834, Tetranychus t. Dugés; 1867, Acarus t. 
Turpin; 1875, Tetranychus t. Koch. 
1804. Trombidium maius Herm.; 1834, Tetranychus m. Dugés. 
1804. Trombidium tenurpes Herm.; 1834, Tetranychus t. Dugés. 
1804. Trombidium socium Herm.; 1867, Acarus s. Muller;:1875, Tetranychus socius 
Koch. 
1832. Tetranychus lintearius Dufour; 1867, Acarus |. Boisduval; 1877, Tetranychus 1. 
Murray. 
1867. Acarus russulus Boisduval; 1875, Tetranychus r. Koch. 
1867. Acarus tim Boisduval; 1877, Tetranychus t. Murray. 
1867. Acarus cucumeris Boisduval; 1877, Tetranychus c. Murray. 
1867. Acarus rosarum Boisduval; 1877, Tetranychus r. Murray. 
1867. Acarus cinnabarinus Boisduval; 1877, Tetranychus telarius var. c. Murray. 
1867. Acarus haemaiodes Boisduval; 1877, Tetranychus telarius var. h. Murray. 
_ 1867. Acarus vitis Boisduval; 1877, Tetranychus v. Murray. 
1867. Tetranychus ferrugineus Boisduval. 
1875. Tetranychus urticae Koch. 
1875. Tetranychus fervidus Koch. 
1875. Tetranychus popuk Koch. 
1875. Tetranychus piger Donnadieu. 
1875. Tetranychus minor Donnadieu. 
1875. Tetranychus longitarsis Donnadieu. 
1875. Tetranychus plunustoma Donnadieu. 
1875. Tetranychus rubescens Donnadieu. 
1875. Phytocoptes epidermi Donnadieu. 
1875. Phytocoptes galiarum Donnadicu. 
1875. Phytocoptes nervorum Donnadieu. 
1876. Tetranychus pilosus C. and F. 
1890. Tetranychus 6-maculatus Riley. 
1892. Tetranychus bimaculatus Harvey. 
1900. Tetranychus glovcrt Banks. 
