AIIACHNIDA. 
185 
Cyphophthahnus, g. n., J osepli, 1. c. p. 249. Sp. C. duncorius, sp. n., Joseph, 
I c. p. 260. The animal lives in the Lueger cave, especially towards the 
entrance, in company with Adelops montanus, Leptinus testaceus, and several 
Plialangiidm. It was found the author in various stages of growth ; but 
the youngest forms observed presented a close general resemblance to the 
adults. It is more active in its movements than Trayulus, and was found, 
in captivity, to feed pretty freely upon dead Podurce and upon the pupfe of 
ants. 
ACAUINA. 
Clapauede lias published (Zeitschr. fur wiss. Zool. xviii. 
pp. 445-546, pis. 30-40) an elaborate memoir on the anatomy, 
physiology, and natural history of the animals of this order. He 
refers to the genus Atax, of which he distinguishes three species, 
namely: — A. ypsilophorus (Bouz), with which Tromhidium no- 
tatum (Rathke), Lminochay'es anodontm (Pfeif.), and Hydrachna 
concharum (Vogt) are identical; At ax [Hydrachna] crassipcs 
(O. F. Mull.) ; and a species which Claparedc proposes to name 
Atax bouzi, sp. n. (/. c. p. 451, pi. 32. figs. 4-7). The develop- 
ment of this species is described by Claparede in great detail 
(1. c. pp. 451-465), and the anatomy of the mature individuals 
(l.c. pp. 465-470). The author then compares his Atax houzi 
in all these respects with the allied species, and especially with 
A. ypsilophorus. The details of the development of A. houzi are 
illustrated upon plates 30-32, and the comparative anatomy of 
the species of Atax on plate 33. 
Clapauede also describes the anatomy and development of 
Tetranychus telarius (Linn.), l.c. pp. 480-490, pi. 40, and adds 
that Leptus autumnalis (Shaw) agrees so closely with T. telarius 
in its structure that it cannot be separated generically from 
Tetranychus. The larva and perfect 6 of T. telarius are figured 
by Claparede, 1. c. pi. 40. figs. 14, 15. 
After describing the developmental history of Tyroglyphus 
(/. c. pp. 490-493, pi. 38. figs. 1-6), Claparede shows that the 
genus Hypopus (Duges) is founded upon the male forms of cer- 
tain species of Tyroglyphus, the development of which is fully 
described and illustrated {J. c. pp. 493-507, pi. 35). He de- 
scribes also the development of an Hoplophora, which he iden- 
tifies with the species described by Perty as Phthiracarus con- 
tractilis (/. c. pp. 507-519, pi. 34), the anatomy and deve- 
lopment of Myobia musculi (Schrank), with which he regards 
Heyden^s M. coarctata as identical (l.c. pp. 519-530, pi. 37. 
figs. 1-4), and the structure of Dermaleichus musculinus (Koch), 
for which he proposes to form a new genus, Myocoptes (1. c. 
pp. 530-534, pi. 39. figs. 1-9). In the concluding section of his 
memoir he cites, in favour of the Darwinian theory, some ob- 
servations on the clinging-organs possessed by many Acarina 
