Moreover the bare spaces are configurated otberwise. A mediau 

 bare space is absent ; the two long bare spaces of H. hirsutus are 

 broken here into three smaller ones, and the two other spaces 

 are more backward and oblique. Of the vertical hairs usually only 

 two are directed forward. These two hairs are pectinated on their 

 inner side (Fig. 34). 



On the ventral side (Fig. 35) we observe a sternal shield which 

 has only 3 pair of hairs, whilst that of H. hirsutus is wholly 

 haired. The genital and ventral shields have fused into one shield 

 of which the genital part is bare, whilst the ventral part is hairy. 

 There are two small inguinal shields. The anal shield bears a 

 few small hairs, except the usual three ones. The whole belly 

 is moreover hairy. All the coxae have a distal serrated edge. The 

 peritrema is longer than in H. hirsutus, extending beyond the 

 coxae 1. 



The epistoma (Fig. 36) more resembles that of H. nidi Michael, 

 being provided anteriorly as well as on its sides with slips, like 

 the tongs of fire-flames. 



The mandibles (Fig. 37, 38) are of the usual type in Acari. 

 The fixed finger has only two incisors quite distally ; the movable 

 one an indication of a cheek-tooth, two small dog-teeth and a 

 robust incisor. Moreover the fixed finger has a lanceolate, trans- 

 parent sense-organ, resembling a male copulation organ. 



The hypostome (Fig. 39) has distinct inner and outer malae of 

 the usual type. The latter are sharp distally. The 6 hairs of the 

 hypostome have a few beards, as well as those of the ventral 

 side of the first joint of the palp. In the median line of the ventral 

 side of the capitulum there are 12 pair of minute tooth-like markings. 



Habitat: Talpa europaea L.; Mus sylvaticus L. 



Patria : Germany. 



10. Key to the species of Haemogaiiiasus Berl. 



Nympha. 

 Only one nympha known H. hirsutus Berl. 



