ON THE GENUS AMPEIPSYLLA. 407 



bristle to the anterior apical angle. In the new species the 

 apical spine is placed outside an imaginary line connecting the 

 larger apical bristle with the lower spine, whereas in kuznetzovi, 

 according to Wagner's figure, this spine is situated proximally 

 to the line. The ninth sternite (ix. st.) resembles that of A. casis, 

 with the apical portion of the horizontal arm narrow. 



2 . The seventh sternite is sinuated, with the upper angle 

 produced into a more or less pointed lobe. The eighth tergite 

 bears thirteen to sixteen bristles inclusive of the apical ones. 

 The proportional breadth and width of the stylet are 1 : 3. The 

 head of the receptaculum seminis is as long as the tail (figs. 5 

 and 6). 



Two pairs from Eger, Bohemia, January, 1912, off Mustela 

 erminea, collected by E. Hentschel ; also some specimens from 

 the neighbourhood of Djarkent, in East Turkestan, off a white 

 weasel, collected by W. Eiickbeil. 



10. Ahphipsylla certa, spec. nov. (PI. II. and III., figs. 2, 3, 



and 4.) 



$ 2 . The hind tibia has between the postmedian and sub- 

 apical dorsal pairs of bristles usually three, seldom two or four 

 bristles. 



$ . The eighth tergite bears from the stigma downwards 

 fifteen bristles in one specimen (type) and ten in another, these 

 bristles being distributed from the dorsal margin to near the 

 ventral one. The eighth sternite has about fifteen long or fairly 

 long bristles at and near the edge, and about twenty small ones 

 besides. A small ventral cone bearing a bristle from between 

 the seventh and eighth sternite projects on each side. The 

 process P of the clasper is essentially the same as in the 

 preceding species, while the movable process is very different. 

 This finger (F, PI. II., fig. 1) is an oblong which widens apically, 

 and of which the ventral distal angle projects downward. It 

 bears at the posterior margin three black spiniform bristles, two 

 below the upper distal angle (one curved upwards, the other 

 downwards), and the third at the lower angle directed down- 

 wards. A fourth but smaller black bristle is placed on the 

 inner surface at some distance from the edge. The apical edge 



