220 



SPOROZOA. 



granules are aggregated at the two ends. The male becomes 

 shorter, thicker, and finally nearly round. In one instance 

 a double infection of a blood- corpuscle by the two kinds of 

 gametocytes was seen. 



Remarks. — Wasielewski and Wiilker (1918) described from 

 the kestrel a parasite which they named H. danilewskyi var. 

 tinnunculus, accepting the view that many species of birds can 

 harbour the same species of parasite. They point out that in 

 kestrels the infection is either acute or chronic. Acute 

 infection occurs in young birds, which are heavily infected 

 and show schizonts in the various organs. When this subsides 

 chronic infection supervenes and is characterized by relapses 



Fig. 108. — Hsemoproteus danilewskyi var. tinnunculus Was. & Wiilk. 

 A, female gametocyte ; B, male gametocyte ; C, double 

 infection with both types of gametocytes. (After Wasielew- 

 ski and Wiilker.) 



of a milder type extending over several years. Different 

 stages in the life-cycle are fully described by them. 



Habitat. — Blood of the scops owl, Otus hakkamcena hakka- 

 moena Pennant : Ceylon, Colombo. Also in the blood of the 

 following birds from India in the Zoological Gardens, London : — 



Anas {Fuligula) baeri Radde (Bayer's pochard). 

 Kittacincla macroura Blanf. & Gates (shama). 

 Copsychus saularis (Linn.) (Indian dial-bird). 

 Cor acta benghalensis indica Linn. (Indian roller). 

 Garrulax albigularis Gould (white-throated jay-thrush). 

 Glareola pratincola Linn, (pratincole). 

 Garrulus lanceolatus Vigors (jay). 



Melophus melanicterus (Gmelin) (crested black bunting). 

 Mesia argentauris Hodgs. (silver-eared babbler). 

 Nettapus coromandelianus GmeHn (cotton-teal). 

 Propasser rhodochrous (Vigors) (finch). 



Prunella strophiata jerdoni Brooks {=Tharrhaleus jerdoni 

 Blanf. & Gates) (Jerdon's hedge-sparrow). 



