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The jl-iip «howc when this voiume was 



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AU books not in use ' 

 for iiistruction or re- 

 scarch are limited to 

 all borrowers. 



Voliinies of periodi- 

 cals aiul of paniphlels 

 coinpi ise so many sub- 

 jects.lhat Ihey are held 

 in the library as niuch 

 as possible. For spe- 

 cial pnrposes tbey are 

 givenout fora limited 

 time. 



Graduates and Sen- 

 iors are allowed five 

 volunies for twoweeks. 

 Other students may 

 havetwo vols. froni the 

 circulating- library for 

 two weeks. 



Books not iieeäed 

 duriiig recess periods 

 sliould be returned to 

 the library, or arrange- 

 ments niade for their 

 return during borrow- 

 er'sabsence.il wanted. 



Books needed by 

 more tlian one person 

 are held on the reserve 

 list. 



Books of special 

 value and gift books, 



RETURN TO 

 ENTOMOLOGY LIBRARY 



Cornell University 

 Ithaca, N. Y. 



ö^ 



! In Norddeutschland bisher beobachtet 



3 1924 018 324 008 



