THE BRITISH WOODLICE. 89
Haplophthalmus danicus Budde-Lund. Plate VIII.
1870 Haplophthalmus elegans Budde-Lund 6), p. 228 (not Haplophthalmus
elegans Schobl).
1879 Haplophthalmus danicus Budde-Lund (7), p. 9.
1881 Haplophthalmus mengii Weber (76), p. 102, pl. V., figs. 7-9 (not Itea
mengii Zaddach).
1885 Haplophthalmus danicus Budde-Lund (8), p. 250.
1898 Haplophthalmus danicus Sars (59), p. 168, pl. LXXIV., fig. 2.
This species was added to the British list by the Rev. Canon
Norman (49), who found a colony in his garden
at Berkhamsted. It has rows of tubercles on
its thorax instead of ridges, and there are no
ribs at all upon the abdomen. The front of the
head projects further comparatively and forms
a more acute point than in Haplophthalmus mengii
and it is not so purely white in colour as the
latter species.
BRITISH LOCALITIES :—
England: Warley Place; (W.M.W. from
Miss Willmott) : Queen's Cottage, Kew Gar-
dens; Stanmore; Hanwell, garden at Odstock,
Bennett's Nurseries ;(W.M.W.): Berkhamsted ;
(Norman, 49).
FOREIGN DISTRIBUTION :—
Europe : France ; (25); Denmark ; Holland ; Germany ;
(Dollfus, Feu de Jeun, Nat., April, 1896) : Norway ;
(Sars, 59).
Section—ONISCI.
THE OUTER DIVISIONS OF THE TAIL APPENDAGES BROADER THAN
THE INNER ONES.
Family—ONISCIDAE.
Tail appendages projecting when the animal is walking.
(1.) Unable to roll up into a complete ball.
Genus—ONISCUS Linne 1746 (41), p. 360.
Flagellum, with three joints ; abdomen broad; head with lateral lobes.
The characters given above taken in conjunction with the
size of the animals will serve to distinguish the members of
this genus.
Oniscus asellus Linne (The "Common Slater.") Plate IX.
1761 Oniscus asellus Linne (41), p. 500, No, 2058.
1792 Oniscus murarius Cuvier (9), p. 22, pl. XXVI.
1838 Oniscus fossor Koch (34), part 22, pl. XXII.
1868 Oniscus asellus Bate and Westwood (1), p. 468.
1868 Oniscus fossor Bate and Westwood (1). pp. 471-2.
1898 Oniscus asellus Sars (59), p. 171, pl. LXXV.