ACARIDEA. 
Arachn. 25 
living on soft parasites, particularly Listrophores ; heteropalpus, ip. 426, 
pi. xxix. figs. 1-6, at the base of feathers of several of the Columhidm 
and Passeres, and macronychus, p, 427, pi. xxix. figs. 7 & 8, in colonies 
at the base of the feathers of several exotic Passeres, M^gnin, 1. c . ; 
spp. nn. 
Harpi[r']rhynchus, g. n., M^gnin, 1. c. p. 429 ; for H. nidulans, sp. n., 
in large colonies in the follicles of the wing feathers in a Lark, and in 
tumours on a Grosbeak. 
Gamasidje. 
Gamasus scaraboeicolus, sp. n., F. Karsch, MB. Ak. Berl. 1878, p. 335, 
pi. i. fig. 5, Mozambique. 
Pterygosorna agamoe, Peters ; id. 1. c. p. 336, pi. i. fig. 9. 
IxODIDiE. 
Four different species of Ixodes observed on one animal, coupling. 
Mode of copulation noted ; the situation of the penis and oviduct being 
at the base of the rostrum. P. M^nin, Bull. Soc. Eut. Fr. (5) viii. p. xci. 
Ixodes acanthoglossi, p. xxxv., on Acanthoglossus hruijni, and trimacu- 
latus, p. cxxviii., on a Saurian, Vat'a7ius chlorostigma, both from New 
Guinea, spp. nn., H. Lucas, Bull. Soc. Ent. Fr. (5) viii. 
Amblyomma variegatum, F., Rhipidostoma leachi, Aud., and Derma- 
centor rhinocerotis, De G., from Mozambique ; F. Karsch, MB. Ak. Berl. 
1878, p. 337. 
Amblyomma petersi, Karsch, 1. c. p. 336, pi. i. fig. 4, Mozambique; A. 
arteriosum, L. Koch, Verb. z.-b. Wein, xxvii. p. 786, Japan: spp. nn. 
Rhipi l^do'] ce2yJialus expositicus, sp. n., Koch, Verzeichniss, &c., p. 84, 
Nuremberg. 
Hcemophy salts hirudo, sp. n., Koch, Verh. z.-b. Wien, xxvii. p. 786, Japan. 
Trombidiid;e. 
Geckobia, g. n., P. M^gnin, Bull. Soc. Ent. Fr. (5) viii. p. xlii. and Ann. 
1. c. The first known instance of one of the group living parasitically in 
the adult state. Respiratory stigmata forming a pair of elongate tubes 
inserted above the base of the rostrum. Mandibles approaching those of 
Ixodes ; eyeless. G. latasti\i], sp. n., p. 188, pi. vii., in the interdigital 
spaces and peri-palpebral furrows of a lizard \^Platydactylus~\ from Algiers. 
HYDRACHNlDAiJ. 
Croneberg, a. H. Ueber den Bau der Hydrachniden. Zool. Anz. i. 
pp. 316-319. 
An abstract of the author’s paper in Russian (Nachr. Ges. Mosc. xxix. 
pt. 2, pp. 1-40, pis. i.-iii.), which is based upon an examination of the 
tracheal, digestive, excretory, glandular, and generative systems of dif- 
ferent species of Eylais, Hydrachna, and Nescea. There appears to be no 
rectum in these species, the colon ending in a cul-de-sac. 
