Clare Island Survey — Acarinida. 39 107 



projecting rounded anterior corners to the abdomen is lost. The notogaster 

 of this species is finely punctured and interspersed with larger punctures, and 

 there is a marginal row of six hairs. 



Distribution.- — England (Cornwall, on licheu growing on granite rocks, 

 Michael). 



Malaconothrus monodactylus (Michael). 



Clare Island in sphagnum, August ; Westport, common amongst sphagnum 

 on Croaghpatrick, October. 



The cephalothorax of this curious species is distinctly granular, and the 

 abdomen is finely punctured with numerous larger punctures. The hinder 

 margin is rather more acuminate than it is figured in " British Oribatidae " 

 (48). 



Distribution. — England (on moss and sphagnum, Michaeli ; Scotland 

 (Evans). An allied, if not identical, species M. globiger Tragardh has been 

 described from Swedish Lapland (88). 



Lohmannia insignis Berl. 

 Found associated with Springtails (Lipura ambulans) attacking the roots 

 of Kidney Beans in a Dublin garden during the month of June (Carpenter 

 27). 



Hypocthonius rufulus C. L. Koch. 

 Common in moss on Clare Island and Achill, and in the Westport 

 district. 



Distribution. — Finland to Italy. 



Brachychthonius brevis (Michael). 



A few examples of this minute species were found amongst sphagnum 

 moss on the slopes of Croaghpatrick in October. 



This genus was recently described (10, p. 219j by Berlese with Hypoc- 

 thonius brevis as the type. In the same reference three new varieties of the 

 species are briefly described. The Croaghpatrick specimens agree with the 

 typical form as described by Michael (48, p. 539). The pseudostigmatic 

 organs have the extremities strongly fusiform and setose. In addition to the 

 rostral hairs there are two other pairs of hairs on the cephalothorax of this 

 species. An anterior pair in a position which corresponds to that of the 

 lamellar hairs of the typical oribatid and the other pairs springs from a 

 prominence immediately in front of the pseudostigmata. The Irish specimens 

 measure from about 200/i to 210ju in length, by 135^ in breadth. 



Distribution — Italy (Berlese) ; England (Michael) ; Scotland (Evans) ; 

 Lapland (Sarekgebirge, var. lapponim Tragardh). 



