igii- Foster. — Two Exotic Species of Woodlice in Ireland. 155 



sent by him to Professor Budde-Lund, who confirmed the 

 identification. I have to thank Mr. Pack Beresford for his 

 vahiable assistance in estabhshing the identity of these 

 woodhce, and for searching out the information concerning 

 them which is embodied in this paper ; also Mr. Davis, the 

 curator of the park, for assistance on various occasions. 



Trichorina tomentosa, Budde-Lund. 



Alloniscus tomentosus, Budde-Lund. 



Bathytropa thermopliila, Dollfus. 



The following is taken from Professor Budde-Lund's 

 description of Alloniscus tomentosus, which he afterwards 

 changed to Trichorina tomentosa. " Body oblong oval, 

 rather convex ; the whole surface very densely furnished 

 with scaly hairs. Antennae unknown. Eyes small, simple. 

 Frontal lobe of the head slightly produced ; lateral lobes 

 small, rounded. Posterior, edge of first body-segment 

 curved, of the three succeeding segments nearly straight or 

 very slightly curved at each side ; suture lines being visible 

 on segments 2, 3, and 4. Telson triangular, short, twice as 

 broad as long, with obtuse apex slightly projecting beyond 

 the lateral plates of the last abdominal segment. Colour 

 white. Length 3 "5 mm., width 1*5 mm." The above 

 description is of a single specimen taken by Dr. Meinert at 

 Las Trincheras, Venezuela, in December, 1891. M. Adrien 

 Dollfus describes this species from specimens taken in a 

 hot greenhouse in the Jardin des Plantes, Paris, under the 

 name Bathytropa thermophila, and says that the antennae 

 have a biarticulate flagellum, the proximal joint being only 

 one-third the length of the distal joint. He further states 

 that the telson is as long as broad, and cites the dimensions 

 of this woodlouse as 2:|- x i mm. In our opinion the speci- 

 mens taken in Belfast are more readily recognisable from 

 M. Dollfus' description than from that of Prof. Budde-Lund. 

 About a dozen specimens of this species were obtained in 

 Belfast, several of them being mature, and some of these 

 have been placed in the National Museum, Dublin. Al- 

 though the British Museum (London) possesses specimens 



