ACARIDEAt 
Arachn . 17 
Gilson, C. The Spermatogenesis of the Acarians, and the Laws of Sper- 
matogenesis in general. Rep. Brit. Ass. 57, pp; 758 & 759. 
* . lStude compart de la Spermatogdn&se chez les Arthopodes-Acariens. 
Cellule, iv, pp. 1-93 (cf. Zool. Anz. xi, p. 4G8). 
*Dammer, U. Ueber die Beziehungen der Milben zu der Pflanzen. 
Humboldt (Dammer) vii, pp. 137 & 138 (c/. Zool. Anz. xi, p. 468). 
Kramer, R. Ueber Milben. Z. Naturw. 1888, p. 646. 
Loew, F. Norwegische Phytopto- und Entomo-cecidien. Yerh. z.-b. 
Wien, xxxviii, pp. 537-548. 
Nalepa, A. Die Anatomie der Phytopten. SB. Ale. Wien, xevi, pp. 
115-165. 
Quieter, H. E. Note on a Parasitic Mite of Testacella scutulum. 
J. Conch, y, p. 314. 
Sciiaub, R. von. Ueber die anatomie von Hydrodroma . Ein Beitrag 
zur Kenntnis der Hydrachniden. SB. Ak. Wien, xcvii, pp. 
98-151. 
Cuticle, mouth-parts, trachero, nervous, alimentary, and generative 
systems described fully in a species of Hydrodroma. 
Sciilechtendal, D. von. Ueber Zoocecidium. Beitrage zur Kentniss 
der Acarocecidien. Z. Naturw. lxi, pp. 93-113. 
Stefani, T. D. Sopra una galla di Phytoptus sul Vitex agnus-castus . 
Nat. Sicil. viii, pp. 66-69. 
Westiioff, F. Ueber die iiberwinterung der Gallmilben. J. Ber. westf. 
Yer. p. 31. 
Winkler, W. Die Anatomie der Gamasiden. Arb. z. Inst. Wien, vii, 
pp. 317-354, 1 pi. 
The author treats principally of the anatomy of Gamasus and Uropoda. 
He describes the mouth-parts and their innervation, the heart, alimentary 
canal, excretory and reproductive organs. 
ORIBATIDiE. 
Michael describes and figures the following, from various parts of 
Britain : — 
Tegeocranus , synopsis of British species, p. 337 ; dentatus, n. sp., on 
decayed trees, pi. xxvi, figs. 1-7 & 9, p. 338 ; cepheiformis (Nic.), fir-trees, 
pi. xxv, figs. 1-7, p. 340 ; hericius, n. sp., on oak trees, pis. xxv, figs. 8-13, 
& xxvi, fig. 10, p. 346. 
Notaspis characterized, p. 349 ; synopsis of British species, pp. 354 & 355, 
bijilis (Herra.), syn. cornula , ? badia, acuminata (Koch), in moss, pi. xxvii, 
p. 356 ; exilia (Nic.), in moss, pi. xxviii, figs. 1-5, p. 359; tibialis (Nic.), 
in moss, pi. xxviii, figs. 6-8, p. 362 ; similis , n. sp., in moss, pi. xxxi, figs. 
9-12, p. 363 ; juncta (Mich.), in moss, pi. xxviii, figs. 9-12, p. 365 ; 
serrata (Mich.), in lichen, pi. xxix, figs. 1-10, p. 366 ; pilosa (Koch), syn. 
pilosula (Koch), pi. xxix, figs. 1 1—1 6, p. 370 ; lucorum (Koch), in lichen,’ 
