Clare Island Survey — Acarinida. 39 51 



Gamasus (Eugamasus) Trouessarti Berl. 



1889. G. thalassinus Berlese et Trouessart 17. 1892. Beiiese 2, p. 67. 



Both sexes occurred commonly under stones at high-water mark on the sea- 

 shore at Westport, July. It is also an abundant species on the Dublin coast. 



It should be noted that this species appears under the name of G. excurrens 

 in Berlese's tabular synopsis of the species of Eugamasus (13, p. 165). 



Distribution. — Has been recorded from the coasts of Norway and France. 

 Gamasus {Eugamasus) Kraepelini Berl. 



I have found the male of this species on decayed fungi in woods at 

 Glendalough, Co. Wicklow, September. 



Gamasus (Dtigamasus) cornutus G. et B. Can. 



Male found under bark at Stepaside, Co. Dublin, April. 



Gamasus (Amblygamasus) septentrionalis var. norvegicus Berl. 



1902. P. septentrionalis Oudemans 60, p. 39. 1906. 1, p. 190. 



The remains of an adult male of this species were found in moss at Delphi 

 in county Mayo. 



The type-form of this distinct species was described from Holland by 

 Oudemans. In his monograph of the species of Gamasus Berlese subse- 

 quently described two varieties under the names of germanicus and norvegicus. 

 The Irish specimen is to be referred to the latter form. 



Distribution. — The species is now known to occur in Norway, Germany, 

 Holland, and Britain. 



Gamasus (Pergamasus) nmcatellus Berl. (PL IV, fig. 1.) 



1903. Berlese 5, p. 237. 1906. Berlese 13, p. 209. 

 Clare Island, amongst moss, in July. 



The single male specimen found in this locality is not quite typical in 

 the armature of the second legs. The processes of the patella and tibia are 

 distinctly larger, in proportion to the segments from which they spring, 

 than they are shown in Berlese's drawings of P. runcatelhis. In this respect 

 they approach P. minor Berl. The chelicerae agree closely with those of 

 the Venetian form figured by Berlese (13, pi. xii, fig. 8a). 



Distribution. — Italy and Germany (Bremen, Poppe). 



Gamasus (Pergamasus) runciger Berl. et var. armatus nov. (PI. IV, fig. 2a-g.) 



1903. Berlese 6, p. 263. 1906. Berlese 13, p. 214. 

 Achill Island, male found under bark of decayed fir trees, September. 



