NEW OR LITTLE- KNOWN ACARI. 97'9 



Process on dorsal surface of capituluni well-cleveloperl and conical. 

 Hypostoine rather long and slender. First leg greatly enlarged ; 

 its claws very large; thepulvillus very much reduced in size, being 

 obsolete. Lateral setre of this leg shorter than in A . Iate7'alis ; 

 there are two rows of strong backwardly-directed denticles on the 

 posterior and postero-ventral surfaces of the first leg, also a few 

 projections on the anterior (inner) surface, and one or two rather 

 strong ventral tooth-like projections. First coxa with the spur 

 on its posterior margin poorly developed ; second and third coxa; 

 each with a slight lobe-like spur posteriorly, these spurs being 

 weaker than in A. lateralis and A. calcaraius. 



Length of body (not including capitulum) -73 mm, ; its width 

 •51 mm. 



Host : Kolenati states that either Rhinopoma microphyllum or 

 else Pteropus mjyptiacus is the host of this species of .mite. I 

 have only seen a single example, ex Kolenati's collection. 



Ancystropus yETUiopicus, sp. n. ? (Text-figs. 7 & 10« & c.) 



$ . Apparently the dorsum is not divided into tv'o portions by 

 a transverse line in this species. Dorsal shield (scutum) shaped 

 as shown in text-fig, 7 (the dotted line). Hairs on anterior 

 margin of dorsum very short. The pair of hdirs present just 

 behind the posterior end of the scutum in A. lateralis is missing 

 in A. mthiojjicus. Sternal shield larger than in A. zelebori 

 Kolenati, and its shape is quite diflerent. Process on dorsal 

 surface of capitulum conica}. 



The strongly chitinized internal portion of the jugular plate 

 varies considerably in shape in specimens of this mite from 

 different localities ; the posterior margin of this internal part 

 is strongly concave in the examples from Damba Island, Lake 

 Victoria, the posterior angles (auriculae) being large and strongly 

 ■produced ; whereas in specimens from the Gambia the posterior 

 margin is almost straight, the auricula) being practically absent ; 

 the typical specimen from Zanzibar is rather intermediate in this 

 respect, the posterior margin of this part of the plaque being 

 somewhat concave with well-developed auriculae. Hypostome 

 slender and fairly long. Palp rather short and fairly stout. 

 J^'irst leg much enlarged as in A. zelebori^ but the backwardly- 

 directed little chitinous processes on the posterior side of this 

 limb are weaker than in that s|)ecies; those of the lower row are 

 sometimes distinct and dentiform, being especially well-developed 

 in examples from Damba Island, Lake Victoria; but those of the 

 upper I'ow are quite weak; one or two of the processes on the 

 anterior surface of this leg are large, however. Olaws of first leg 

 apparently rather smaller than in A. zelebori; the pulvillus 

 obsolete. Posterior spur of fii\st coxa obsolete ; second and third 

 coxEe each with a distinct lobe-like posterior spur; a weak 

 pointed posterior spur may also be present on the fourth coxa. 

 Hairs on dorsal surface of legs shorter and finer than in A. lateralis 

 and also smoother, the accessory hairlets being obsolete. 



