NEW OR LITTLE-KNOWN ACAIU. 987 



fairly well-developecl. First pair' of legs greatly enlarged, rouch 

 as in A. zelebori; the lateral setae of this leg much better 

 developed than in that species, being rather stout and projecting 

 sideways and slightly forwards ; on each side of the distal end of 

 this leg there is a paddle-shaped seta, its tip being flattened and 

 truncated. At the base of each of the lateral setae there is a 

 curious projection ending both proximally and distally in an 

 angular process or tooth, partly formed or at least accentuated 

 by the concave distal margin of the ventral surface of the 

 segment. Similar projections may occur also on the inner 

 surface of the first leg. The upper latex^al row of denticles 

 present in A. zelebori seems to be absent in the present species 

 and also in A. calcaraizis, sp. n. Claws of first leg not very 

 large ; pulvillus present. Coxse 1-3 each with a lobe-like spur 

 on the posterior margin. A pair of very long hairs is present 

 dorsally on the femur of the first leg and another shorter pair on 

 the patella ; similar but shorter hairs are also present on the 

 same segments of the second and third legs ; the trochanter of 

 the third leg also has a rather long dorsal hair. A rather long 

 dorsal hair is present also on the trochanter, femur, patella, and 

 tibia of the fourth leg. All these long hairs have very minute 

 accessory spinules or hairlets, causing them to have a slightly 

 roughened appearance. Latei-al hairs of legs stiflf, plain, and not 

 very long. 



c? . Scutum covering the entire dorsal surface. Jugular 2)laqtce 

 ■with the posterior margin somewhat concave. Sternal plate very 

 like that of the female, but with the usual anterior genital pore. 

 The pair of hairs at the distal end of the tarsus of the first leg 

 are not paddle-shaped, their tips being finely pointed. Spurs on 

 coxaa not so well-developed as in the female. 



2 . Length of body (not including capitulum) •70-'79 mm. ; 

 its width "SS— '56 mm. 



J . Length of body (not including capitulum) '50 mm. 

 Host: A h-iut-ha,t {Eouseitus cegyptiacus). 1 have examined the 

 cotype deposited in the Brit. Mus. Collection by Kolenati ; also 

 specimens from Rehoboth and Jaffa, Palestine, Jan. 1912 and 

 Feb. 1920 (J. Aharoni), and examples from Cyprus, collected by 

 Miss D. M. A. Bate. 



Periglischrus interruptus Kolenati. (Text-figs. 14 & 15.) 



Pteroptus interruptus Kolenati, Die Parasiten der Chiropteren, 

 1856, p. 29; rterajytus hipposideros Kolenati, t. c. p. 29; 

 Periglischrus interruptus Kolenati, Sitzb. K. Ak. AViss. Wien^ 

 1858, xxxiii. p. 80 ; Periglischrus hipposideros Kolenati, t. c. 

 p. 82 ; Periglischrus glutinimargo Kolenati ?, t. c. p. 80. 



5 . A small species with the posterior end peculiar in shape, 

 being wider than the rest of the body and flattened dorso- 

 ventrally, forming a kind of rim. The weak sternal plate 

 apparently has no hairs on its surface, but there are three pairs. 



