ROUTES OF MIGRATION. 



SO bitterly assailed „Netz" * is after all induced in his own way, not 

 phaenologically but „faunistically". Corresponding to the species 

 he chose, the Migration of which he described on the base of 

 ornithological observations, the routes lead mostly to the margin of or 

 along water. In this way Palmen in general avoided the difficulty of 

 making his routes go through districts which no Ornithologist has visi- 

 ted and of which we posses no phaenological data at all, as unfortu- 

 nately is the case with Dixon's** and Quinet's maps. 



But in order that this „critical and automatic review" may render 

 complete service, also for myself and the H. C. 0, 1 append in two groups 

 a summary of the Theses induced by us, as well as those gathered from 

 Literature, beginning with the sayings of the EmperoR FREDERIC II. 

 This review is not exhaustive, but it will contain all that is especially 

 characteristic; and that will suffice. 



* Net, system of routes. 

 ** One of his lines is drawn over Agram— Servia, where in 1895 no observations were 

 made at all. 



izo 16 



