ACARIDEA. 
Arachn. 23 
Tromhidium fuscum, Bl•ad 3 ^ Name changed from fucicolum on its 
having been found in Ireland and England in fresh water. Brady, 1. c. 
p. 26. [Scarcely seems a good reason for change of name.] 
Pachjgnathus nigrescens, sp. n., id. 1. c. p. 26, pi. iv. figs. 4 & 5, Nor- 
thumberland. 
Tetramjchus. “ La bocca ed i piedi dei Tetranychus.^' Errors in 
descriptions of former authors (Dugcs, Claparcde, Donnadieu, &c.) 
pointed out, and claws and mouth parts explained. A. Targioni-Tozzetti, 
Bull. Ent. Ital. ix. pp. 333-340, pi. viii. figs. 4-9. 
Tetramjchus eriostemi, sp. n , A. Murray, I. c. p. 109, fig., on Erio^ 
siemon ncriifoliim^ London. 
Acarid.®. 
Megnin, J. P. Monographic de la Tribu des Sarcoptides Psoriques, qui 
comprend tons les Acariens de la gale de I’Homme et des Animaux. 
R. Z. (3) V. pp. 46-213, pis. iv.-viii. 
This important addition to medical Arachnology is divided into the 
following parts : — (1) Historical, commencing with the Scriptures, but 
containing many useful references. (2) Natural history of the Acaridea^ 
constituting the tribe of “ Sarcoptides psoriques.” In this, the author 
proposes the following classification for the A caridea : Gamasidce, Txo- 
didce^ Oribatidce, Sa 7 'coj)tidce, Myohiidce, Seirida;, Tromhidiidce, Limno- 
charidcc, Hydraclinidcc, Ata.cidce, Arctisconidce, and Demodicidce. These 
families are subdivided into tribes, the Sarcojytidoi being composed of 
Detriticoles, Psoi'iques, AvfcoZcs, and Gliricoles ; and the Psoriques consist 
of the genera Sarcoptes^ Psoroptes, and Chorloptes. Full descriptions, with 
synonymy and biology, are given of Sai'coptes scahiei, L., which is com- 
mon to man and a largo number of animals, with varr. suis, p. 83, equi, 
p. 84, pis. iv. & V., milpis and lupi^ p. 86, caprcv, p. 88, cameli, p. 89, ovis^ 
p. 90, hydrochoeri, p. 91, and hominis, p. 92 ; S. notoedres, Bourg. & Delaf., 
pi. iii. (= cati, Hering, 1838), with varr. 7iiuris, p. 114, and cati, p. 115 ; 
S. muta7is, Rob., pi. vii. ; Pso7'optes longi7’ost7'is, sp. n., p. 138 (= Sarcop>tes 
equi, Her., De7'matodectes comTnimis, Bourg. & Del.), with varr. equi^ 
pi. viii., and hovis^ p. 140, cu7iicuU, p. 141, and ovis, p. 142 ; Chorioptes 
(= Symbiotes, Gerlach, nec Redt., Col. ; = De7'matophagus, Fiirstenb.) 
spathiferus, sp. n., p. 154 (= bovis or equi, Gerl.), with var. equi ; C. seti- 
fc7'us, sp. n., p. 147, with varr. hycTice, ibid., and vulpis, p. 158 ; C. ecau- 
datus, sp. n., p. 158 (? = Sa7'coptes cy7iotis, H^r.), with var. catotis, p. 160. 
(3) Organization and physiology of the itch-mites. 
Guzzont, Melciiiorre. Sull Acariasi del condotto uditivo externo. 
Milan ; 1877 [not seen by the Recorder, but quoted by Megnin, Mon. 
Sarc. Psor. pp. 154 & 213, with reference to Aca7'i in the auditory 
meatus of the dog and pig]. 
Analges, Nitzsch (= De7'7nalichiis, Koch). Revision of the genus by 
G. Haller, Z. wiss. Zool. xxx. pp. 50-80, pi. iii. Thirteen species are 
recognized, including A. nitzschi, p. 70, fig. 12, on E7uberiza citrinella, A. 
coleopte7'oides, p. 74, fig. 14, also on that bird, A. affi7iis, p. 75, fig. 15, on 
