_England_: Brightlingsea; Warley; (W.M.W.): Epping Forest; (Bate and Westwood, 1): Hanwell; Southall; Kew Gardens; Langley; Burnham Beeches; Dropmore; Skirmett; Bluebell Hill, Maidstone; (W.M.W.): Chislehurst; Plymouth; Polperro; Looe; (Bate and Westwood, 1): Hertfordshire; Northumberland; Durham; (Norman, 49): Exeter; (Parfitt, 53). _Scotland_: Edinburgh; (Scott, 68): Cumbrae; (Robertson, 57). _Ireland_: Connemara; (Norman, 49): Dublin; Wexford; Cork and Kerry; (Percival Wright _teste_ Bate and Westwood, 1): Tyrone; Waterford; Portlaw; Kilkenny; Wicklow; (Kinahan, 33). _FOREIGN DISTRIBUTION:--_ _Europe_: France; (25): Spain; (15): Italy; (19): Norway; Sweden; Denmark; Germany; (59). _Africa_: Algeria; Tunis; Azores; (24). _America_: Niagara; North America; (59). =Trichoniscus vividus=, Koch. PLATE IV. (from a spirit specimen). 1840 _Itea vivida_ Koch (34), part 34, pl. IV. 1858 _Philougria vivida_ Kinahan (33), pp. 197 and 198, pl. XXIII., fig. 2. 1868 _Philougria vivida_ Bate and Westwood (1), Vol. II., pp. 458 and 459, figs. This species is claret-brown in colour and under a lens it is seen to be marbled with white, indeed in appearance it is much like _Trichoniscus pusillus_ though twice the size. There are important differences between the two species as regards the number of joints to the flagellum. These vary from five to seven in _Trichoniscus vividus_ while in the other, as already pointed out, there are not more than four. The body is practically speaking smooth for it bears only very small tubercles, widely separated. In _Trichoniscus vividus_ the antennæ lack the bristles which characterise those of the other species in the genus. The species under consideration was discovered by Dr. Kinahan in March, 1858, at Portlaw, Co. Waterford and is active even amongst the snow. [Illustration: FIG. 38.--FLAGELLUM AND LAST PEDUNCULAR JOINT OF THE ANTENNA OF _Trichoniscus vividus_.] _BRITISH LOCALITIES:--_ _Ireland_: Portlaw, Co. Waterford; (Kinahan, 33): Cappagh, Co. Waterford; (Scharff, Irish Nat., Vol. IX., p. 158): Borris, Co. Carlow; (Scharff, 64.) _FOREIGN DISTRIBUTION:--_ _Europe_: Spain; (12). =Trichoniscus roseus= Koch. PLATE V. 1838 _Itea rosea_ Koch (34), part 122, pl. XVI. 1858 _Philougria rosea_ Kinahan (33), pp. 197 and 199, pl. XXIII., fig. 3. 1858 _Philougria rosea_ Bate and Westwood (1), p. 460. 1898 _Trichoniscus roseus_ Sars (59), p. 163, pl. LXXIII., fig. 1.