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the last peduncular joint, and composed of 3 articulations, the last terminating
in a dense Lunch of delicate hair-like bristles. Last pair of legs in male com-
paratively more strongly Imilt than in female, hut otherwise of a very similar
structure. Uropoda with the rami nearly equal and somewhat longer than the
II.-ISM! part. Colour pure white, semipellucid. Length of adult female 3 mm.
Remarks. This form was first described by Zaddach in the year 1844
as Itea Meui/ii, being referred to the Kochian genus,
which is identical with
Triclwnlsens of Brandt. In the year 1860 Mr. Schobl examined the same form,
and regarded it as new to science, describing it as the type of a new genus
under the name of Haplophthalmus elegans. It is easily distinguished from the
2nd species by the very distinct and regular longitudinal ribs on the dorsal face
of the mesosome, and by the rather conspicuous dorsal prominences
segment
of the metasome.
of the 3rd
Occurrence. I first met with this pretty form, hitherto not recorded from
any of the Scandinavian countries, early in the spring of this year (1897)
on the
steep banks of a little river at some distance from Ohristiania, where it occurred
rather plentifully, deeply concealed in the crevices of mouldering argillaceous
slate. The females at that time were laden with eggs and young, and male
specimens occurred almost as abundantly as females. Subsequently
in 2 other places, likewise in the neighbourhood of Ohristiania,
I found it
beneath stones
and pieces of old wood. It moves very slowly, and, in spite of its small size,
is easily detected by the pure white colour of the body.
Distribution. Prussia, Germany, Bohemia, France.
2. Haplophthalmus danicus, Budde-Lund.
(PI. LXXIV, fig. 2.)
Haplophthalmus (Innim*. liudde-Lund. Pvosp. gener. spec, crust. Isop. terrestr., p. U.
'n : Haplophthalmus
ela/ans, B.-Lund (olim).
,. MeH(/ii. \\Vber (not. 7;idd:irh).
rH. Form of body resembling that of the preceding
species, being, as a rule, somewhat shorter and compacter in male than in female;
dorsal !';irc very rough on account of numerous, somewhat unequal tubercles arranged
in longitudinal rows, though not forming distinctly defined ribs, as in H. Mengii.
Cepha.hm with the front acutely produced, lateral lobes broadly
rounded. Side-
pl.'ites of mesosome MS in H. Mrnt/ii. Metasome nearly smooth above, without
the slightest trace of :my prominences on the 3rd segment, Appendages of body
almost exactly M.mveiitg in structure with those in the preceding species, except