genera on the basis of insignificant characters. Amblyocentor is 

 therefore considered as a subgenus of Dermacentor . 



A few male specimens have the anterior spots of the scutum 

 partially or completely fused, thus resembling the female scutum, 

 Neumann (190X,1910B) described the subspecies peraaculatus on 

 the basis of these differences. Subsequent investigators with 

 the exception of Tonelli-Rondelli (1930A), have disregarded this 

 najne and considered these characters to be no more than individiial 

 variation (Bequaert 193 OB), 



A '"provisional name'*, D. rhinocerotis arangis , was applied by 

 Lewis (l93i!t., p, 39) to specimens of variable color but after com- 

 parison with other specimens this name was withdrawn (footnote of 

 same page). 



Females have two large patches of reddish brown hairs and 

 scattered lighter hairs near the posterior margin of the body dor- 

 sally. These, and the cuticle of this species, have been studied 

 by Schulze (19A^A) and Jakob (192^). Schulze (l9Al) noted features 

 of the tarsus and haller's organ, and (195QA.) of the dentition of 

 this tick. 



IDENTIFICATION 



Key characters readily separate and identify the two Dermacen - 

 tor species discussed in this report. 



- 336 _ 



