40 



U.S. NATIONAL MUSEUM BULLETIN 2 65 



C. malayanus. 



Host choices are known for less than half of the subspecies of this 

 cuckoo. In the case of three of them, only warblers of the genus 

 Gerygone have been reported thus far, and it is likely that these birds 

 are the most frequently used hosts. However, more complete knowl- 

 edge may reveal a less rigidly obligate dependence on Gerygone 

 than is suggested by the current data (e.g., in the northern Austrahan 

 and New Guinea races of the cuckoo, russatus and minutillus, it is 

 known that fan tails and honeyeaters also serve as hosts). However, 

 in the case of russatus, where more observations have been put on 

 record than with minutillus, while 4 of the 1 1 fosterers are species of 

 Gerygone these 4 account for more than two-thirds of all host records, 

 with no fewer than 1 1 records for G. magnirostris and 5 for G. palper- 

 brosa. The former of these two species is also known to be the chief 

 host of the cuckoos of the subspecies minutillus. 



The total reported fosterers are listed below.^ 



*No hosts yet known for the other races of this cuckoo. 



1 For pertinent published data see: C. m. malayanus — Bromley 1941, pp. 

 140-146; Hoogerwcrf 1949, p. 91; Makatsch 1955, p. 188; North 1895, p. 39; 



1912, p. 28; C. m. rwssa??/s— Barnard 1926, pp. 6-7; Cayley 1950, p. 69; Chisholm 

 1925, p. 164; Le Souef 1898, p. 59; Macgillivray 1914, p. 163; Mack 1930, pp. 

 302-303; Makatsch 1955, p. 189; Mathews 1918, p. 366; Schon wetter 1964, p. 571; 

 White 191.5, p. 152; C. m. minutillus — Barnard 1914, p. 43; Campbell 1901, pp. 

 584-585; Cayley 1950, p. 70; Le Souef 1898, p. 59; Makatsch 1955, p. 189; 

 Mathews 1914, p. 116; North 1895, p. 39; Schonwetter 1964, p. 571; White 1915, 

 pp. 153-154; C. m. albifrons — Bartels 1925, pp. 54-61; Hoogerwerf 1949, pp. 

 91-92; Makatsch 1955, p. 189; Schonwetter 1964, p. 570; C. m. poecilurus— TioM 



1913, pp. 190-191; Makatsch 1955, p. 189; Rand 1942, p. 313; Schonwetter 1964, 

 pp. 570-571. 



