142 ANIMAL ECOLOGY 



und Litteratur. 1898. Leipzig. Bd. II. Die 

 bisher in Europa und im Arktischen Gebiet gemach- 

 ten Bltitenbiologischen Beobachtungen. Theil 1 und 

 2. 1899. Leipzig. 



APPEL, O., and LOEW, E. 



1904-1905. (Continues Knuth.) Bd. HI. Die bisher in 

 Aussereuropaischen Gebieten gemachten Bliiten- 

 biologischen Beobachtungen. Thiel 1, 1904-1905, 

 Leipzig; Thiel 2, 1905, Leipzig. 



This is an encyclopedia on the relation of animals to 

 the pollination of flowers. Plants are arranged sys- 

 tematically and the visitors are listed. In Bd. II, 

 Th. 2, pp. 559-672, and Bd. Ill, Th. 2, pp. 259-470, 

 are given systematic-alphabetic lists of animal 

 visitors to flowers. Full references. 



MULLER, H. (Trans, by D. W. THOMPSON.) 



1883. The Fertilization of Flowers, pp. 669. London. 



NEEDHAM, J. G. 



1900. The Fruiting of the Blue Flag (Iris versicolor L.). 

 Amer. Nat., Vol. XXXIV, pp. 361-386. 



RILEY, C. V. 



1892. The Yucca Moth and Yucca Pollination. Third Ann. 



Rep. Mo. Bot. Garden, pp. 99-158. 



ROBERTSON, C. 



1897. Flowers and Insects. Contributions to an Account 

 of the Ecological Relations of the Entomophilous 

 Flora and the Anthophilous Insect Fauna of the 

 Neighborhood of Carlinville, Illinois. Trans. Acad. 

 Sci. St. Louis, Vol. VII, pp. 151-179. 

 This is only one of a very extensive series of papers 

 published in the Transactions of the St. Louis Acad- 

 emy, Vols. V, VI, VII, and in the Botanical Gazette 

 beginning with Vol. XIV, 1889, and extending 

 to Vol. XXVHI, 1899. 



TRELEASE, W. 



1893. Further Studies of Yuccas and their Pollination. 



