ACARIDEA. 
Arachn, 29 
is made to a description of the same in a hitherto-unrecorded work by 
Sorauer, “ Die Milbensucht der Birnbaiime,” in “ Arbeiten der pflanz- 
physiologischen Versuchsstation am Pomol. Institut zu Proskau, 1877.” 
A 
Pentastomid^. 
Pentastomum polyzonum^ Harley, rediscovered in an African Python, 
and its differences from P. annulatum, Baird {— P. multicinctum, Harley), 
pointed out ; F. Jeffrey Bell, Ann. N. H. (5) vi. p. 173. \_Cf. P. Z. S. 1857, 
for a good figure and short description of P. pohjzonum, Harley.] 
TARDIGRADiE. 
F. E. L. Beal, Am. Nat. xiv. p. 593 (with woodcut), describes the 
manner of depositing eggs in this group. 
The following papers have been omitted from former Records : — 
Megnin, M. Memoire anatomique et zoologique sur un nouvel Acarien 
de la Famille des Sarcoptides, le Tyroglyphus rostrosei'ratus, et sur 
son Hypopus. J. de I’Anat. Phys. ix. pp. 369-388. , 
. Memoire sur I’organisation et la distribution zoologique des 
Acariens de la Famille des Gamasides. Op. cit. xii. pp. 288-336, 
pis. vii. vii. 
A general paper on the GamasidoR, treating (i.) on their anatomy and 
physiology ; (ii.) classification, based exclusively on organic affinity ; (iii.) 
proof of the Gamasidm forming a very natural transition between 
Arachnids and Insects ; (iv.) establishment of the fact that the para- 
sitism of Gamasids belongs exclusively to nymphs, or very young 
fecundated females, as a means of preservation and distribution, being 
thus false parasites.” The literature relating to this family is noticed ; 
general considerations are entered into to show its place in the Acaridea; 
and an analytical table of the various families, together with Donnadieu’s 
table (Recherches sur les Tetranyches. Lyon et Paris : 1875, 4to) is 
given. Analytical tables are also given of the genera and species of 
Gamasidm, whose typical genus is Uropoda (not Gamasus). At pp. 327-335 
a synopsis of the known species of Gamasidce is given, viz., Uropoda, 
De Geer, 3 ; Gamasus, Latr., 13 ; Dermanyssus, Duges, 3 ; Pteroptus, 1- 
Figures of each genus are given. 
Memoire sur les Sarcoptides plumicoles. Op. cit. xiii. pp. 209-248, 
391-429, 498-519, & 629-656, pis. xii., xiii., xxii.-xxix., & xxxvi.- 
xxxviii. 
An important and exhaustive treatise on the parasitic Acaridea living 
on birds’ feathers. Part i. pp. 209-248, pis. xii. & xiii., treats upon the 
external anatomy of the family Sarcoptides in general, but especially of 
the Sarcoptides plumicoles, in the following order : — Structural characters 
of Acaridea, pp. 210-212 ; ditto of fam. Sarcoptides, pp. 214-217 ; hairs 
of ditto, pp. 217-222; skin and cutaneous furrows, pp. 222-225; seg- 
ments of cephalo thorax, rostrum, legs, and abdomen, pp. 225-228 ; genital 
