SURBOVA (1955). Btilgaria. As H. _£. plunbevim ; distribution, 

 biology, ecology, epidemiology. (Not translated). 



SEEIDYUKOVA (1955). VSSR. As H. plumbeum ; larva illustrated 

 and compared with those oT other genera. 



TARASEVICH (1955). USSR. As H. _£. plumbeum ; vector of Q 

 fever (R. burnetii ) . "" 



HYALQD4A RUFIFES 



DAUBNEf (19AA). Kenya. Morphology and biology under stvidy. 



HYALQ-II^ TRUNCATUM 



WALKER, J. B. (Correspondence). Kenya. Life cycle. At Muguga, 

 when all stages were fed on the ears of rabbit, the life cycle 

 was the two host type. Miss Walker believes that the type of 

 host to which the larva attaches influences the number of hosts 

 involved in the life cycle. The following data were obtained 

 when nonf eeding stages were maintained at 25°C . to 27°C . 



PERICD DAYS 



Preoviposition 5 



Oviposition to hatching 28 

 Larvae feed and molt; nymphs 



feed on same animal 15 to 23 



Nymphal preraolting period 17 



Adult prefeeding period 7 to 17 or more 



Disease relations: Experimentally, East Coast fever (Theileria 

 parva ) develops and is transmitted by H. truncatum (experiments 

 by Dr. S. F. Barnett and Mr. K. P. BaileyT^ Inasmuch as im- 

 mature stages do not normally feed on bovines, transmission 

 in nature is rare. 



_ 890 - 



