130 
New Species of Ticks 
H. warburtoni , Nuttall, 1912. The present variety still further departs 
from the normal Haemaphysalis type, and still more closely approaches 
Aponomma. The genera Haemaphysalis and Aponomma have normally 
little in common, except the negative characteristics of the absence 
of eyes and anal plates, and we should not have expected any question to 
arise as to which of them a newly discovered form belonged. Yet a 
grave question does arise in the present case, and though we judge the 
tick here described to be a Haemaphysalis, its resemblances to an 
Aponomma are not merely superficial. It possesses one Haemaphysalis 
characteristic never found in Aponomma —the blade-like dorsal retro¬ 
grade spur on trochanter 1. Moreover, it is found on a mammal, 
whereas Aponomma is essentially parasitic on reptiles. The long palps 
need not trouble us much, as we know of several undoubted species of 
Haemaphysalis almost equally aberrant in this respect; and, though the 
palps are long and very Aponomma- like when viewed dorsally, they do 
not recall that genus when viewed in profile (see Fig. 8). The Aponomma- 
like shape of the scutum, also, is of little importance, for there is a 
great range of scutal design in Haemaphysalis. It must be admitted, 
however, that not only the dentition (3 1 3) but the whole appearance of 
the hypostome is more like that found in Aponomma than Haema¬ 
physalis, and that coxa I, though not distinctly bifid, displays a tendency 
in that direction. 
