g/S SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I46 



evolution is not completely the same as that of their history. The 

 former should, technically, be limited to the chronology, and, wherever 

 possible, the explanation, of the changes that transpired in the crea- 

 tures during their history, but should not be considered as the whole of 

 their story, even though it may involve its most salient features. An 

 organism may, and often does, survive environmental changes with- 

 out undergoing change in itself, as we have seen in the case of 

 Clamator glandarius. This is certainly a part of its history, but is 

 hardly something that ordinarily would be considered in an account 

 of its evolution. 



APPENDIX 



ADDITIONAL HOST DATA 



A. DATA ON THE HOSTS OF CLAMATOR GLANDARIUS 



So many new species have been added to my original (1949a, pp. 

 10-15) host catalog and so much additional information has been 

 amassed on some of the others, and so many changes in nomenclature 

 have come about that it seems better to present a new catalog than to 

 attempt to present only the new material with the multitude of cross- 

 references needed to collate them with what was known before. 

 Where the present data suggest no alteration in the earlier state- 

 ments, they are given very briefly. 



Two birds, not in the subjoined catalog, have been mentioned in the 

 literature as hosts, but there is no evidence to support these state- 

 ments. The North African little owl, Athene noctua glaux, has been 

 mentioned as a victim, based on a very indefinite statement by Canon 

 Tristram (1859, p. 77), which may best be ignored. A year later 

 Des Murs (1860, p. 218) wrote that the great-spotted cuckoo laid 

 "without doubt" in the nests of the thrush, Turdus merula, but in 

 the more than a century since then no one has reported an actual 

 instance. This statement should also be ignored. 



The data on documented hosts are given below. 



Faico tinnunculus Linnaeus Kestrel 



Jourdain's single record (1920, p. 72; Friedmann, 1949a, p. 10) 

 has remained unique. The fact that the kestrels were using an old 

 magpie's nest probably was a contributing factor in attracting the 

 attentions of the cuckoo, but it should be mentioned that all the eggs 

 were fresh ; in other words, the kestrels were already in occupancy 

 when the cuckoo came there. It suggests that it is the nest itself, 

 rather than the actual appearance of its owners, that is of first im- 



