Glare Island Survey — Acarinida. 39 75 



Distribution. — Italy (found on plants, in moss, and in decayed wood, 

 Leonardi). Holland. Berlese suggests that the species described by 

 Oudemans (74. p. 17) under the name of Seiulus plumosics represents two 

 distinct forms, one being identical with the present species (16, p. 276). 



Seiulus remiger (Kramer). (PI. VI, fig. 20.) 



Achill Island, the female occurred commonly in the hollow stems of a large 

 agaric at Glendaraiy in September; also at Mulranny. I have found both 

 sexes at Glendalough, Co. Wicklow, under the fungus-grown bark of decayed 

 birch trunks during the month of November. 



This beautifully sculptured mite does not seem to have been noticed since 

 Kramer described it under the name Gamasus remiger (36, p. 93), in reference 

 to the curious oar-like hairs on the end margin of the body. It undoubtedly 

 belongs to the Seius group, and as the male is undescribed it may be useful 

 to give a short account of the species. 



Female (fig. 20). — length about 665;/, breadth 378//. Shape sub-oval, 

 shoulders but slightly marked, fore body strongly produced, frontal bristles 

 small. On the dorsal shield there are two circular pits, surface with distinct 

 network pattern, also with squamous and granulate markings. Hair armature 

 feeble, the marginal series increases in length towards the hinder corners of 

 the body where the hairs spring from tubercles, the last pair of hairs are 

 long, and have a narrow apical blade. Sternal and genital plates of the usual 

 laelaptid type, the latter reticulated in front. Ventro-anal plate large and 

 rotund, lying in front of it is a transverse row of six small plates. The peri- 

 treme is protected by a narrow chitinous border fusing beyond the stigma 

 with the pedal plates. 



Capitulum longer than broad, hair armature as usual, maxillary lobes 

 small. Epistome trispinous, the lateral spines are minutely pectinated on 

 their outer margins, and the central spine is longer than the others, with a 

 widened and spinous extremity. Each chela of the chelicerae is furnished 

 with two teeth. Palps normal. Legs of moderate length, spine armature 

 rather weak, in part pedunculate, a pair of long, up-curled hairs spring 

 from the upper side of the tarsus of the last three pairs of legs. 



Male. — Smaller, length about 517//, breadth 286/x. Sternal plate reach- 

 ing the end of the fourth coxae, with five pairs of short hairs ; genital foramen 

 rather large. The ventro-anal shield is very large, and the two inguinal 

 plates, which are separate in the female, are fused with its front corners. 



Capitulum more quadrate. Sexual differences are noticeable in the 

 chelicerae, the free chela has only one tooth, and a sinuate process of uniform 



