86 



[MKi-cb. 



(^ . Meso- and inetanotum with mane. Eighth sternite ffig. 85) 

 with a ventral row of four or five short bristles before the centre, and 

 another row beyond the centre, apex obtuse, without terminal bristle. 

 The two long bristles of clasper much shorter than in eJongafus, the 

 upper bristle shorter than the lower one. Apical margin of finger 

 slightly convex, the posterior angle rounded. 



? , Seventh sternite (fig. 86) with a single row of ten or less 

 bristles on each side. Stylet less than three times as long as it is 

 broad at the base. 



A rare species, probably confined to the serotine bat (Eptesicus 

 serotinus). Only recorded from England, not from Scotland or Ireland. 



41. ISCHNOPSYLLUS OCTACTENDS Koleil. (1856). 



(Fig. 87). 



A small species, with eight combs. Combs on first abdominal 

 segment (third comb) much smaller than the one on the metanotum. 



r^. Meso- and metanotum with a mane of bristles. Eighth 

 sternite without apical hook (fig. 87) ; some of the bristles placed near 

 the apex broadened. Finger much narrower and more regularly half- 

 moon-shaped than in simplex. The long bristles of clasper not 

 appreciably different in length and thickness. 



$ . Seventh sternite with a single row of less than ten bristles 

 on each side. Stylet nearly three times as long as it is broad at the 

 base. 



A common species, recorded from England, Scotland, and Ireland. 

 The usual host is the pipistrelle {Pijnsfrellns jjii'istrellus), but it also 

 occurs on the whiskered bat (Myotis mystacirms) , Daubenton's bat 

 {Myotis dauhentoni), and the hairy-armed bat (Nyctalus leisleri). 



42. IsCHNOPSYLLUS SIMPLEX Bothi<. (1906). 



(Figs. 88, 89). 



The smallest species, veiy pale, closely resembling octactenus. 

 With eight combs. 



^ Without mane. Eighth sternite (fig. 89) broader at apex than in 

 octactenus, from about centre to near apex with a row of slender bristles ; 

 then follow two broadened ventral bristles, and above these a curved 



