ACARIDEA. 
Arachn. 31 
Mus. Genov, xviii. p. 41. II. longipes, p. 41, figs. 12-17, Hatam, Mount 
Arfak, New Guinea, nitidissimus, p. 46, fig. 18, and scutifer, p. 47, fig. 19, 
Fly River, New Guinea, pi. iv., id. 1. c. 
Megisthanus , g. n., p. 48, for M. caudatus, p. 51, figs. 23 & 29, brachy- 
inus, p. 56, figs. 30-32, pi. v., testuda, p. 58, figs. 33-35, Java, doreianu8 y 
p. 60, figs. 36 & 37, Dorey, New Guinea, hatamensis, p. 61, figs. 38 & 39, 
Hatam, New Guinea, pi. vi., T. Thorell, l. c. 
Carpais , Latr. Should take tho place of tho more recent genus 
Gamasus , for those species whose type is G. coleoptratorum , Linn. ; id. 
1. c. p. 49. ♦ 
Dermanyssus gallincv, Redi, lanius, C. Koch, p. 350, albatus, id., and 
hirundinis , Herm., p. 351, described ; A. Berlese, Bull. Ent. Ital. xiv. 
Periglischrus miniopteri, sp. n., Joseph, B. E. Z. xxvi. p. 15, near Laas. 
W. S. Simmons figures a minute Acarid, parasitic on a centipede, 
belonging apparently to the Gamasidm , and probably of a new genus 
and species, but gives no description ; Sci. Goss. 1882, p. 16, fig. 17. 
IXODIDA5. 
Pseudixodes, g. n. for P. ( Ixodes ) holsatus , Fabr. ; G. Haller, JH. Ver. 
Wiirtt. xxviii. p. 311, pi. v. fig. 5. 
Ilaundphysalis ? papuanus , sp. n., T. Thorell, Ann. Mus. Genov, xviii. 
p. 62, pi. vi. figs. 40-44 ( $ ), 45 ( $ ), Ramoi, New Guinea. 
Amblyomma hippopotami , C. L. Koch, found on the journey from Zan- 
zibar to the Great Lakes of Central Africa ; E. Simon, CR. Ent. Belg. 
xxvi. p. lx. 
Argas re/lexus, M£gn. The serious effect of its bite on an infant and 
on an adult is detailed ; and its being traced to a dovecot, destroyed six 
years before, related ; it is thus like Argas persicus , which has been 
proved to live four years; A. Laboulbene, Bull. Soc. Ent. Fr. (6) 
i. pp. xcviii. & xcix. 
Escliatoccphalus crassipes, sp. n., Joseph, B. E. Z. xxvi. p. 16, Ihanska- 
jama, Goba, &c. 
Oribatidje. 
Michael, A. D. Further notes on British Oribatidce. J. R. Micr. Soc. 
(2) ii. pp. 1-18, pis. i. & ii. 
The author controverts the generally accepted idea that the Oribatidm 
are viviparous, quoting Huxley (Man. Anat. Invertebr. Animals, 1877, 
p. 383) as an instance of this error. There are in fact three, if not four, 
modes by which the eggs are brought to maturity: — i. Eggs, as in 
insects ; ii. As soon ready to be hatched ; iii. Hatching just before 
deposition == viviparous, or rather ovo-viviparous ; iv. Not deposited dur- 
ing the life of the parent, but long after death, the chitinous case of the 
abdomen forming a protective covering to the eggs until deposition, or 
rather hatching. The instance of ova found in ecto-skeletons of Hoplo- 
phora (Haller, MT. schw. ent. Ges. 1879, p. 502) is thus explained. The 
