198 The Irish Naturalist. September, 



Entomobrya multifasclata; Tullb. — Gleiicar, 



E. muscoruiTij Nic. — Strandhill. 



Isotoma palustrlS} Miill.— Glencar. 



I. arborea, Linn. (/. denticulata, Schaff. ) -This species occurred rather 

 commonly under stones on the shore of Lough Gill, near Doonee 

 Rock. This habitat is noteworthy, as the insect is usually found 

 under the bark of trees and shrubs. 



Xcnylla brevlcauda, Tullb.' — Under stones on Lough Gill shore, a 

 single specimen. This species — an addition to the fauna of the 

 British Isles— is readily distinguished from X. maritima, Tullb., and 

 X. hiimicola, O. Fab,, by the excessive reduction of the spring (Plate 

 10, A, figs. I, 4) whence the specific name is derived. As in other 

 members of the genus, there are five ocelli (fig. 2) on either side of 

 the head, but no post-antennal organ ; while each foot has only one 

 claw and two tenent hairs (fig. 3 . The position of the spring (fig. 4) 

 enables me to figure one of the mucrones in profile, and the other as 

 seen from beneath, the form agreeing nearl}-, though not exactly, 

 with figures of the same species given by Agren' and Borner. 

 Doubtless, however, there is considerable variation in these details. 

 X. brevicatida has been found in Norway, Sweden, Finland, Russia, 

 and Northern Germany. 



EXPI^ANATlON OF Pl,ATE lO, A. (p. 20l). 



Fig. I. Xenylla brevlcauda, Tullb., ventral view, magnified 63 times. 



2. Left antenna and ocelli, magnified 216 times. 



3. Foot and claw, magnified 290 times. 



4. Spring, magnified 290 times. 



ARACHNIDA. 

 ARANEIDA AND PHALANGWA. 



BY PROF. GEO. H. CARPENTER, B.SC, M.R.I.A. 



The spiders collected or noted were few in number, and of no great 

 rarity. A list of the species, with localities, may, however, be worthy 

 of record : — 



Tcxtrix denticulata, Oliv. — Slishwood, Lough Gill. 

 Pedanostethus livldus, BL— Lough Gill shore ; adult female. 

 Erigone dentipalpis, Wid.— Glencar ; Strandhill ; both sexes adult. 



' T. TuUberg, Sveriges Podurider. Kongl. Svcnsk. Vetens. Akad. Handl. 

 vol. x., No. 10, 1872 (p. 53, pi. xi., figs. 9-14). 



= 11. Agren, Zur Kenntniss der Apterygoten-Fauna Siid-Schwedens, 

 Stett. Efilom. Zeitiingy 1903, p. 126, pi. ii., fig. 9. 



^'C. Borner, Neue Collembolcnformen, ZooL /Ins. xxiv., 1901, p. 697, 

 fig. 2. 



