HYDRACAEINA : THE GENUS OXUS KRAMER. 33 



'not fusiform as in 0. flantaris. The bay of the epimera is wide 

 at the posterior end (PI. 1, fig. 14). The anus is placed about 

 one-fifth the length of the genital plate behind the genital fissure, 

 1;he two anal glands being wide apart and placed well behind 

 the anus, not in a line. 



In place of the two strong spines at the apex of the first pair 

 of epimera in 0. plantaris (PI. 1, fig. 3) two broad blunt teeth 

 are found (PI. 1, fig. 15) presenting a very different appearance. 



Male. — The male is about 0-85 mm. long. The epimeral plate 

 covers more of the ventral surface than it does in the female, 

 'The posterior end of the genital bay is not so broad and the 

 genital area only measures about 0-14 mm. in length. 



Lincolnshire, by D. George. Norfolk Broads, Burnham Beeches, 

 Tunbridge Wells and Mill Hill. 



Description of Figures, Plate 1. 



Jig. 14. Ventral surface of female showing genital area and 

 position of anus and anal glands. 

 ,, 15. End of 1st pair of epimera showing the blunt tooth- 

 like processes. 



Oxus strigatus (Miill.) Piersig. 

 Pl. 1, figs. 16-18. 



1776. Hydrachna strigatus Miiller. Zool. Dan. Prodr., page 191, 



no. 2279. 

 1781. Hydrachna strigatus Miiller. Hydrach., page 71, tab. 10, 



figs. 1-2. 

 1835. Marica strigatus Koch. C. M. A., fasc. 5, f. 23. 

 1880. Pseudomarica formosa Neuman. SvensJca Ah. Handl., 



N.S., vol. xvii. no. 3, page 71, tab. 5, fig. 2. 

 1892. Frontipoda strigatus Koenike. Zool. Anz., vol. xv. page 



263. 

 1897. Oxus strigatus Piersig. S. B. Ges. Leipzig, vol. xxii.- 



xxiii. page 86. 



Female. — This mite is the smallest of the three species, beinc 

 about 0-80 mm. long. Very like 0. ovalis, only narrower. Colour 

 a yellowish green with dark-brown markings on dorsal surface ; 



JouRN. Q. M. C , Series II.— No. 84. 3 



