25 



Trichoniscus pusillus Brandt. 

 In moist situations everywhere this species is numerous 

 throughout the British Isles. The violet-coloured variety is not 

 uncommon in our district. 



Trichoniscus roseus (C. L. Koch). 

 Whether this species be really native or not is question- 

 able. It is, as a rule, confined to greenhouses and gardens but 

 has, in a number of Irish localities, been also noted in the open 

 country in conditions far from artificial. It has been recorded 

 from numerous localities in Cavan, Monaghan, Fermanagh, 

 Tyrone, Armagh, Down, Antrim and Londonderry. 



Trichoniscus pygmasus G. O. Sars. 

 This little species was first discovered in Ireland at Hills- 

 borough, Co. Down, but has since been found in limited 

 numbers in damp situations in every county in which careful 

 search has been made. It occurs in all the Ulster County 

 Divisions, but it may be noted that it seems to be much scarcer 

 during the Summer than in the Winter months of the year. 



Trichoniscus stebbingi Patience. 



Without doubt this is an exotic species in Ireland, as indeed 

 in the sister isle, being found exclusively in warm greenhouses. 

 In Ulster its recorded habitats are Rossmore Gardens, Monaghan; 

 Downshire Gardens, Hillsborough, Down ; and Botanic Gardens 

 and Crawford's Nurseries, Belfast, Antrim. 



Trichoniscoides albidus (Budde-Lund). 

 In Ireland this species has only been noted in the vicinity of 

 the coast, and must be considered as one of our rarer isopods. 

 It has been taken at Bundoran, Donegal E. ; Horn Head, 

 Donegal W T . ; St. John's Point and Newcastle, Down ; Stranmillis 

 (Belfast), Antrim; and at an elevation of 1,100 feet on Bene- 

 venagh, Londonderry. 



