478 
NEW SPECIES OF TICKS {HAEMAPHYSALIS, 
AMBLYOMMA). 
By L. E. ROBINSON, A.R.C.Sc. Bond. 
{From the Cooper Laboratory for Economic Research, Watford.) 
(With 4 Text-figures.) 
The following descriptions relate to two new species of the genera 
Haemapliysalis and Amblyomma, respectively, and to a new variety of 
Amblyomma variegatum-. 
Haemapliysalis silacea sp. ii. $, from South Africa (370) h 
Amhlyomma variegatum var. n. nocens, $, from South Africa (371). 
Amhlyomma fiebrigi sp. n. $ and $, from South America (6). 
Haemaphysalis silacea sp. n. 
Fig. 1 , a-f 
Male: unknown. 
Female (ungorged): body 2‘4 x 1'7 mm., ovate, narrowing anteriorly ; 
colour earthy yellowish-brown; dorsum punctate, almost glabrous. 
Marginal groove commencing some distance behind the scutum and 
terminating at the antepenultimate festoon. Postero-median and 
accessory grooves represented by broad shallow depressions; festoons 
well-defined. Scutum 1’04 x 1T7 mm., broadly ovate, almost circular; 
colour somewhat darker than the general body colour; deeply emar- 
ginate, scapulae rounded; punctations fine, fairly numerous and 
regularly distributed. Cervical grooves of moderate depth, slightly 
convergent posteriorly. Capitulum {1. 440 y) short and broad; basis 
1 These figures refer to numbers iu W. F. Cooper’s collection. 
