132 [Dec, 1846. 



derlandsche overzeesche Bezittengen door de leden der 



Natuurkundige commissie in Oost-Indie en Andere Schrij- 



vers. Zoologie. 12 Nos. Folio. 

 Systeniatische Uebersicht der Vogel Nord-Ost Afrikas. Von 



Dr. Ed. Riippell. 1 vol. 8vo. Frankfort Am. Main. 1845. 

 Neue Wirbelthiere zu der Fauna von Abyssinien gehbrig 



entdeckt und beschrieben von Dr. Ed. Rtippell. 1 vol. 4to. 



Frankfort Am. Main, 1835-40. 

 The Genera of Birds. By Geo. Robert Gray, F. L. S. Il- 

 lustrated with about 350 plates, by David Win. Mitchell, 



B. A. F. L . S., &c. 28 parts, 4to. 

 Iconographie Ornithologique. Nouveau recueil general de 



planches peintes d'Oiseaux : par 0. des Murs. 3 Livs. 



4to. 

 The Viviparous Quadrupeds of North America. By John 



James Audubon, and the Rev. John Bachman, D. D 



Ninety-three plates. Elephant folio. 



Dr. Leidy read a paper " On the situation of the olfactory 

 sense in the terrestrial tribe of the gasteropodous mollusca," 

 which was referred to Mr. Phillips, Mr. Haldeman, and Dr. 

 Morton. 



A letter was read from Dr. Zina Pitcher, dated Detroit, 

 Michigan, Dec. 3, 1846, transmitting a Catalogue of Birds in 

 the University of Michigan, and soliciting exchanges in seve- 

 ral departments of Natural History. 



The following remarks by Miss Morris, communicated 



through Professor Johnson, fully explain the circumstances 



which led to, and accompanied the discovery of the larvse 



of Cicada septendecim preying on the roots of fruit trees : 



. I have, for a number of years, believed that the failure of fruit 

 on trees over tweuty years old, was mainly owing to the ravages 

 of the larvae of the Cicada septendecim, though Entomologists 

 have heretofore considered them harmless, or nearly so, believing 

 that the principal injury caused by them was received on the 

 branches of the trees when depositing their eggs. But from the 

 fact of their burrowing into the earth the moment of their escape 



