IV 



Page 



Walker, Francis, Esq., F.L.S. &c. 



Catalogue of the Dipterous Insects collected at Sarawak, Borneo, 

 by Mr. A. R. Wallace, with Descriptions of New Species. (With 

 a Plate.) 105 



Catalogue of the Homopterous Insects collected at Sarawak, 

 Borneo, by Mr. A. R. Wallace, with Descriptions of New 

 Species. (With two Plates.) 141 



Westwood, J. O., Esq., F.L.S. &c. 



Description of a New Species of Paussus from Central Western 



Africa 74 



Notice of the " Borer," a Caterjjillar very injurious to the Sugar- 



Cane 102 



Note on Insects producing Wax from Port Natal and China. . . . 104 



Yarrell, William, Esq., V.P.L.S. &c. 



On the Influence of the Sexual Organ in Modifying External 

 Character 76 



Index 177 



