340 Acarology 



(Michael) in a patch of green alga "growing where the fresh water of 

 a small stream trickled over the face of the granite cliffs within reach 

 of the spray of the sea, near Lands' End, Cornwall." Michael says 

 these mites are not swimmers but "crawlers, frequenting algae and 

 stones in shallow water, or even left dry between tides, or living in 

 places where fresh water trickling over rock becomes mixed with salt 

 spray, and the growth of green algae takes place; but they are evidently 

 capable of living comfortably under water." Halbert 1920 found Hya- 

 desia fusca (Lohmann) "in numbers at edges of rock crevices in the 

 Pelvetia and Spiralis zones at Malahide, June 1916. In the same local- 

 ity it was found fairly common in rock-pools containing much Entero- 

 mopha, in the Orange Lichen zone, July and September. First recorded 

 as a British species from Clare Island, where it is abundant amongst 

 coralline seaweeds in rock-pools. Lohmann gives its distribution as the 

 North Sea and the Baltic." Hyadesia uncinijer Megnin has been re- 

 ported as being semiaquatic in Tierra del Fuego, South America. The 

 four known species are: uncinijer Megnin, algivorans {Michael), fusca 

 (Lohmann), and kerguelenensis Lohmann. 



References: 



Andre, M. 1931. Sur le genre Hyadesia Megnin 1889 (Sarcoptides hydro- 

 philes). Bull. Paris, Mus. d'Hist. Nat., Ser. 2, 3 (6): 496-506. 



Halbert, J. N. 1915. Acarinida: II. Terrestrial and Marine Acarina. Clare 

 Island Survey, 31 (39), Section II, pp. 45-136, Pis. 4-8. 



. 1920. The Acarina of the sea-shore. Proc. Roy. Irish Acad. 35, Sect. 



B, pp. 106-152. 



Michael, A. D. 1901. British Tyroglyphidae 1: 200. 



Carpoglyphidae Oudemans, 1923 



Figure 267 



Diagnosis: These mites have a skin which is smooth but not shiny. 

 They may have a propodosomal shield (Carpoglyphus) or be armored 

 and lack a specially circumscribed propodosomal shield (Ferminia) . 

 A pair of vertical setae is present and the propodosoma and hystero- 

 soma are not separated by a suture. All tarsi have stalked claws and 

 caruncles. The female genital opening reaches anteriorly to the medi- 

 anly united apodemes of coxae ii; the male genital opening lies be- 

 tween coxae IV (Carpoglyphus) , or behind coxae iv (Ferminia). The 

 male lacks adanal genital suckers and suckers on tarsi iv. 



