39 50 Proceedings of the Royal Irish Academy. 



Gamasus (Gamasus) lunaris Berl. 



1882. G. rubescens G. et B, Canestrini 23, p. 40. 1892. G. rubescens 

 Berlese 1, Fasc. lxix, n. 9. 1903. G. rubescens Oudemans 60, p. 78. 1906. 

 G lunaris Berlese 13, p. 147. 



A female of this species occurred on the sea-shore at Westport in 

 company with Gamasus Kempersi, to which it bears a superficial resemblance, 

 chiefly due to similarity in the outline of the endogynium. A careful 

 comparison of the two forms shows many differences. 



Distribution.— Throughout Italy and elsewhere in Europe (Berlese). 



Gamasus (Gamasus) coleoptratorum (Linn.). 



Immature specimens of both sexes occurred under bark of decayed trees 

 near Westport in July ; the nymph was also found on the sea-shore at 

 Mulranny in September. 



Distribution. — Common and widely distributed in Europe. This species 

 has been noted in Scotland as an ectoparasite of the Eed Grouse (Proc. Zool. 

 Soc. London, 1909, p. 309). 



Gamasus (Eugamasus) magnus Kram. 



1876. Kramer 36, p. 91. 1906. Berlese 13, p. 177. 



Found amongst moss in Knappagh Wood near Westport, August. 



Distribution. — Germany (Kramer) ; Italy (northern, Berlese) ; Holland 

 (Oudemans) ; France (Moniez). A variety of this species, cavernicola, 

 Tragardh, has been described from caves in France. 



Gamasus (Eugamasus) immanis Berl. 



1903. Berlese 6, p. 262. 1906. Berlese 13, p. 179. 



Under stones at high-water mark on the sea-shore close to Westport, 

 July. Has also occurred, in a similar situation, at Howth, and at Glandore 

 on the Cork coast. 



This fine species, the largest of the sub-genus Eugamasus, was first 

 described by Berlese from Norwegian specimens. Apparently it has not 

 yet been found in southern Europe. The largest of the Irish specimens 

 measures 2510/* in length. 



Distribution. —Already recorded from the Irish coast by Berlese (13, 

 p. 180) ; Norway. Mr. King has recently found this species at Millport in 

 the Firth of Clyde, and gives an interesting account of its life-history (Proc. 

 Eoy. Phys. Soc. Edinb. xix, p. 129). 



