y76 



MR. STANLEY HIRST ON 



tarsi. There is also a fine hair on the clorsal surface of the 

 penultimate segment of the anterior legs., and a fairly long and 

 fine but rather stiff liair, which has its basal ring rather strong 

 and conspicuous, is placed dorsally near the distal end of the 

 tarsi. 



S . Genital pore anterior in position. Anal plate apparently 

 narrower than in the female sex. 



Measurernents. $ : length (including palpi) -QQ-TO mm. ; 

 width ■3y--40 mm. d : length (including palpi) -66 mm. ; width 

 •30 mm. 



Host : Nucifraga caryocatactes ; three female specimens 

 collected by Herr Tischler at Heilsberg (5.ix. 1913) and a male 

 from Ulmenhorst (12.x. 1911); Thienemann Coll. 



Text-figure 4. 



Bhrnonyssm (Neoni/ssoides) nucifrag(e,.BTp. n., ? . ])oi-sal view. 



Note. — Owing to the presence of two dorsal shields instead 

 of a single anterior one, as is usually the case in Rhinonyssus, it 

 is necessary to place this species in a new subgenus — N'eonyssoides. 

 Rhinonyssus [Neonyssoides) iiucifragce I'esembles Neonyssus 

 intermedins Hirst in having two dorsal shields and also most of 

 the hairs replaced by minute circles, differing from the latter in 

 the shape of the ventral plates, presence of distinct spinules on 

 tlie legs, etc. 



