270 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 99 



Genus CHEYLETIELLA Canestrini 



Oheyletiella Canesteini, Prospetto dell' Acarofauna Italiana, vol. 2, pp. 109, 170, 



1886. 

 Cheletiella (Canestrini) Oudemans, Mem. Soc. Zool. France, vol. 19, p. 211, 1906. 

 Ewingella Vail and Augustson, Journ. I'arasitol., vol. 29, No. 6, pp. 419, 421, 



1943. (Type, ExoingeUa americana Vail and Augustson (monotypic) = 



Cheyletiella parasitivorax (Megnin).) 



Type, Cheyletus parasitivorax Megnin (monotypic). 



CHEYLETIELLA PARASITIVORAX (Megnin) 



Plate 6, Figures 1-3 



Cheyletus parasitivorax Megnin, Journ. Anat. and Physiol., 1878, p. 10, pi. 38. 

 Cheyletiella parasitivorax (Megnin) Canestkini, Prospetto dell'Acarofauna 



Italiana, vol. 2, pp. 169, 170, 1886. — Beulese, Acari, Myriapoda et Scorpiones 



hucusque in Italia reperta, Prostigmata, fasc. 28, No. 3, 1886. — Hikst, Brit. 



Mus. Nat. Hist. Econ. Ser. 13, p. 73, fig. 40, 1922.— Coopeb. Journ. Parasitol.. 



vol. 32, No. 5, pp. 480-482, 1946. 

 Cheletiella parasitivorax (Megnin) Hirst, Ann. Mag. Nat. Hist., vol. 20, p. 132, 



1917. — Pillars, Vet. Journ., London, vol. 81, pp. 96, 97, 1925. — Womersley, 



Rec. South Austral. Mus., vol. 7, p. 59, 1941. 

 Ewingella americana Vail and Auguston, Journ. Parasitol., vol. 29, No. 6, 



pp. 419-421, figs. 1-3, 1943. 



Female. — Palpi short but strong ; palpal femur with a long, serrate, 

 dorsal seta ; genu with a short, serrate seta ; tibia with a short simple 

 seta ; palpal claw curved downward, with many weak teeth. Rostrum 

 short, broad; peritreme with lateral branches composed of large seg- 

 ments, the anterior transverse portion composed of many small seg- 

 ments. Propodosomal shield with three pairs of short anterior lateral 

 setae and a posterior transverse row of four simple setae; two pairs 

 of long, serrate propodosomal shoulder setae. Hysterosoma without 

 shield; with an anterior transverse row of four setae, the outer pair 

 serrate and longer than the simple inner pair (outer setae 106/a long, 

 inner setae 83/x long) ; on the posterior third of the hysterosoma a 

 pair of long, serrate, marginal setae, and anterior to these a pair of 

 short, simple setae. Posterior margin of hysterosoma with a pair of 

 long, simple setae (about 200/a long), a pair of short simple setae 

 inside the long pair, and two pairs of short, simple setae anterior 

 to anal opening ; three pairs of short, simple setae lateral of the anal 

 opening. Two pairs of genital setae and a transverse row of four 

 setae anterior to the genital opening. Legs short; leg I reaches to 

 tip of palpi ; leg IV reaches past posterior margin of body. Tarsus I 

 short, without claws but with pulvillus as figured. Length of body 

 320/A, including rostrum 386 ; width 266/x,. 



Type host. — Rabbit ; preying on listrophorid mites. 



Type locality. — Probably France. 



