CUCULUS CANORUS L. 



After the lapse of 70 years the results of Link's observations 

 therefore form an argument in support of Schlegel's opinion. 



My own experience agrees more with the number adopted by 

 Schlegel than with that adopted by Rey. 



Other observations, on the other hand, are more in favour of 

 Rey's hypothesis, and I consider this point to be still an open 

 question which cannot easily be answered with full certainty. 



In the cases known to me, in which in this'country two canorus- 

 eggs were found in one nest, each of the two eggs belonged in 

 every instance to a separate type. 



In the Netherlands, as far as I am aware, canorus-eggs have up 

 to the present been found in the nests of the following species of 

 birds: 



1. Lanius excubitor L. — Great Grey Shrike. 



2. „ collurio L. — Redbacked Shrike. 



3. Fringilla coelebs L. — Chaffinch, (b.) l ) 



4. Cannabina cannabina (L.) — Linnet, (f.) 



5. Emberiza citrinella L. — Yellow Bunting. 



6. Alauda arvensis L. — Sky-Lark. (g. and k.) 



7. Motacilla alba L. — White Wagtail, (k.) 



8. „ flava L. — Blue-headed Wagtail, (b. and k.) 



9. Anthus trivialis (L.) — Tree-Pipit. 



10. „ pratensis (L.) — Meadow-Pipit, (d.) 



11. „ campestris (L.) — Tawny Pipit. 



12. Certhia brachydactyla Brehm — Short-clawed Tree-Creeper. 



! ) The letters between brackets occurring in the above list after certain of 

 the English names of birds, refer to ca/wras-eggtypes depicted on plates 89 

 and 90, which were found in nests of those species. 



