NEW PARASITIC MITES. 777 



sliields of moderate length ; there are three pairs of these fairly- 

 long hairs on the posterior shield and also three or four pairs of 

 very minute and inconspicuous hairs at its posterior end. Hairs 

 on softer parts of body very numerous, of moderate length and 

 r.ither thick. Stenud plate trapezoidal, its posterior margin is 

 very much thickened, being strongly chitinised as in L. cethio- 

 picns and L. nyassce ; anterior pair of hairs on it quite short, the 

 other two pairs usually longer. Genito-ventrcd plate with the 

 posterior end sharply pointed. Anal plate pear-shaped. Peri- 

 treme only reaching as far forwards as the middle of the second 

 coxa or even shorter. First free segment of ^j«^/> with a Avell- 

 developed process. Second coxa with the anterior spur well- 

 developed ; apparently there are no other spurs or spines on the 

 coxae. Bristles on dorsal surface of legs veiy numerous and 

 rather stout. 



Hosts : Bats. On Pipisti-ellus, Ambleside, Windermere 

 (11. iii. 1912) (J. F. Cormack); ex Dr. J, Waterstoii's coll. 

 On Mijotis myotls, Oristano, )Sardinia (/Jr. A. II. Krausse)] ex 

 Hon. N. 0. Rothschild's coll. On bats, at Ain Sefj-a, 8.W. 

 Algeria (14. v. 1913); ex Hon. N". (J. Kothschild's coll. Oft' 

 Gtenodactylus gundi, Gorge of Tilaton, El Ivantara ; specimens 

 collected by tlie Hon. L. W. Rothschild and Dr. E. Hartert. 

 Also a specimen from a bat, Tabgka, Tiberias (P. E. Schmitz) ; 

 ex the Hon. N. C. Rothschild's coll. 



JSToTE. — Oanestrini, relying upon the colour of living specimens, 

 considered this species of Liponyssus with two dorsal shields to be 

 L. arcuatus C. L. Koch (see Prospett. Acar. Ital. i. pp. 120-121, 

 1885), and Berlese is also of this opinion in his Acari etc. Reprt. 

 in Italia (Ordo Mesostigmata, p. 22, 1892). Oudemans gives the 

 name L. arcuatus to quite a difi'erent species with an undivided 

 scutum (see Arch. ISTaturg. Abt. A. Heft ix. pp. 68-75, 1913). 

 According to this author the name of this species with two dorsal 

 shields should be L. 'micsciolbuis C. L. Koch — a mite found on the 

 house-mouse (see Tijdschr. Ned. Dierk. Ver. (2) vii. p. 293, 1902). 

 It is impossible to determine the two species said by Kolenati to 

 have two dorsal shields, viz., Steatonyssits periblepliarus and 

 ;S'. hraohypeltis (see Sitzb. K, Akad. Wiss. Wien, xxxv. pp. 186 & 

 187, 1859). As it seems to be impossible to ascertain the real 

 name of this mite, I propose the new name L. chiroiyteralis 

 f()r it, 



Liponyssus nyass^e, sp. n. 



$ . Two dorsal shields are present in this species, the anterior 

 one being very wide; the posterior one is much narrower aiul 

 shaped like that of L. cethiopicus, sp. n., and L. chiropteralis, 

 being tongue-shaped and with the anterior margin distinctly 

 concave. It differs from the posterior dorsal shield of L. chiro- 

 pteralis in having a number of moderately long hairs on its 

 surface instead of only three pairs as in that species. Hairs on 

 uncovered (softer) part of dorsum numerous, stiff", of moderate 



52* 



