54 The Irish Natutalist. February, 



completed relative to the publication by the Board of Agriciilture of 

 maps and memoirs sent forward by the Committee, these arrangements 

 including the adoption of a colour scheme and a symbols scheme, and 

 the appointment of a Publication Committee. The following communi- 

 cations were made, most of them being illustrated by maps, lantern slides, 

 or specimens : — Prof. Oliver: Notes from an Idle Holiday ; Prof. Yapp : 

 The relation of Vegetation to Evaporation ; Dr. Pethybridge : Preli- 

 minar}' Observations on the Vegetation of the North Bull ; Dr. Smith : 

 Occurrence of Pine in Peat on Yorkshire moors; W. M. Rankin : Notes 

 on Some Plant Associations : R. lyl. Praeger : Photographs of West of 

 Ireland Plarits. 



ZOOLOGY. 



Armadillidium pictum — a Correction. 



In the Irish Naturalist, vol. xvii., p. 135, I announced the finding of 

 Armadilliditini pictum, Brandt, at Hillsborough and Belvoir Park, Co. 

 Down, and at Glasnevin, Co. Dublin. Since then I have had oppor- 

 tunity of overhauling a considerable number of tj'pe specimens of Wood- 

 lice in the Museum in Dublin, amongst them being specimens of 

 A. pictum and A. nasatum, and not being satisfied about the identity of 

 the specimens I had taken here, I asked Dr. Scharff to re-examine them. 

 Dr. Scharff says that he much regrets having wrongly identified 

 A. nasatum as A. pictum, and he is now fully satisfied that the Irish 

 specimens in the Museum, originally named as A. pictum, belong to 

 A. nasatum, Budde-Lund. The record of A. pictum, must, therefore, be 

 withdrawn, and A. nasatum substituted, this being the first discovery of 

 the species in Ireland. Mr. H. L. Orr has since given me specimens of 

 A. ttasatutn, taken by him in a greenhouse in Belfast, Co. Antrim. 



Nevin H. Foster. 



Hillsborough, Co. Down. 



Armadillidium nasatum and A. pictum. 



Reference to Dollfuss's paper, " Le Genre Armadillidium,''' in the Feuille 

 des Jnines Naturalisles, 1892, will at once .show how different these two 

 species are. In Armadillidium pictum the central cephalic lobe is rather 

 prominent, but not narrowed and produced as in nasatum, and the side 

 lobes are smaller than in that species. The form of telson is different 

 {jiasatum having the lateral margin incurved), and also the type of colour- 

 ation. The relative lengths of the joints of the antennal flagellum is 

 another good character of differentiation, whilst in nasatum the endopo- 

 dite (inner ramus) does not reach to the tip of the exopodite (outer 

 ramus), as in pictum. In pictum the form of the copulative appendage of 

 the first pair of pleopoda in the male, which are extremely long, 



