292 Transactions of the Society. 
tlie principal authorities for the identification and organization of 
Uropodinse. 
Koch, C. L. — 1 Deutschlands Crustaceen, Miriapoden und Arachniden.’ 
Regensburg, 1835-41. This work describes several species, but 
Koch’s species are often difficult to identify, and often based on 
immature forms, &c. 
Megnin, P. — “ Memoire sur l’organisation et la distribution zoologique 
des Acariens de la famille des Gamasides.” Journ. de l’Anat. et de 
la Physiol. (Robin), May 1876, pp. 288-336. This valuable work 
refers chiefly to anatomy, &c., but is of little use in identifying 
species. 
Kramer, P. — “ Zur Naturgeschichte einiger Gattungen aus der Familie 
der Gamasiden.” Arcliiv fiir Naturges., 1876, pp. 47-105. — “Ueber 
Gamasiden.” Op. cit., 1882, p. 374. 
Haller, G. — “ Acarinologisches ” (second paper of that name). Archiv 
fiir Naturges., 1881, p. 182. 
Canestrini, G., & F. Fanzago — “ Intorno agli Acari italiani.” Atti 
del R. 1st. Veneto di Sci. Let. ed Arti, 1877. 
Canestrini, G. — “Acari nuovi o poco noti.” Op. cit., 1884. — “Pros- 
petto dell’ Acarofauna italiana.” Padua, 1885. 
Canestrini, G., & A. Berlese. — “ Sopra alcune nuove specie di Acari 
italiani.” Atti della Soc. Veneto-Trentina di Sci. Nat., 1884. 
Berlese, A. — “ Acari, Miriapodi e Scorpioni italiani,” Padua, Florence 
and Naples, commenced 1882, still publishing, but Gamasidse, includ- 
ing Uropodinas, apparently finished. — “Acari Austro- A mericani quos 
collegit Aloysius Balzan.” Bull. Soc. Entom. Ital., 1888. 
TnoRELL, T. — “Descrizione di alcuni Arachnidi inferiori dell’ Archi- 
pelago Malese.” Ann. del Mus. Civ. di St. Nat. di Genova, February 
1882, vol. xviii. p. 21. It is doubtful whether the species here 
described are really Uropodinse. 
Winkler, W. — “ Anatomie der Gamasiden.” Arbeiten Zool. Inst. 
Univers. Wien, 1888, Bd. vii. Heft iii. p. 318. 
Michael, A. D. — “ Observations on the Special Internal Anatomy of 
TJrojpoda Krameri .” This Journal, 1889, p. 1. — “On the Variations 
of the Female Reproductive Organs, especially the Vestibule, in 
different Species of TJrojpoda .” Op. cit., 1890, p. 142. — “On the 
Association of Gamasids with Ants.” Proc. Zool. Soc. Bond., 
December 1st, 1891, p. 638. 
Classification of the UropodiN;E. 
Until the year 1876 the Uropodinse consisted of the single genus 
TJrojpoda ; because Koch’s proposed genus Celseno was a genus of 
Oribatidse, not of Gamasidse ; although one species of the latter family 
( segrota ) was placed in it by mistake ; but in that year Kramer 
instituted the genus Trachynotus for a species ( pyriformis ) which he 
subsequently identified, I think erroneously, with the very species 
which Koch had placed by mistake among the Oribatidse. Unfor- 
tunately Kramer’s name cannot be sustained, because it had been used 
