14 THE ENTOMOLOGIST. 



The volume contains 312 pp. letler-press, and 8 coloured 

 Plates. Price 12s. 6d. 



The Trustees of the British Museum have printed the 29th 

 Part of the ' Catalogue of Lepidoptera,' by Mr. Walker ; it 

 is confined exclusively to Tineina, and contains descriptions 

 of numerous extra-European species; it contains 260 pp. 

 letter-press. Price 3s. 6d. 



The Linnean Society has just issued a new Part of its 

 printed ' Proceedings,' containing 144 pp. letter-press and 

 two Plates. Price 3s. It contains two entomological papers, 

 bearing the titles which follow : — 



1. Catalogue of the Heterocerous Lepidopterous Insects 



collected at Sarawak, in Borneo, by A. R. Wallace, 

 Esq. ; with Descriptions of New Species, by Francis 

 Walker, Esq., F.L.S. 



2. Catalogue of the Dipterous Insects collected at Waigiou, 



Mysol, and North Ceram, by A. R. Wallace, Esq. ; 

 with Descriptions of New Species, by Francis Walker, 

 Esq., F.L.S. 



Form of Cells. — At the April Meeting of the Entomological 

 Society a very lengthened discussion took place on the hex- 

 ahedral form of the cells in a honeycomb ; Mr. Smith, the 

 late President, thinking that the form exhibited design on 

 the part of the builders; Mr. Waterhouse, Mr. Newman and 

 others thinking the figure a necessary consequence of crowded 

 contact: the arguments on both sides will be published. 



Polymorphism. — Mr. A. R. Wallace exhibited varieties of 

 extra-European butterflies, proving the existence of a pheno- 

 menon which he calls polymorphism. To me it appears that 

 Mr, Wallace has not studied the departures from normal 

 colour which occur in the Lejndoptera of our own island, or 

 he would neither have laid such stress on colour, nor would 

 he have appealed to the imperfectly-known fauna of distant 

 lands to establish his views. Such a phenomenon, if it exist, 

 would be readily marked at home, and without any risk of 

 error in the facts ; whereas Mr. Wallace found himself com- 

 pelled to assume that C and D were females of A, and then 

 to build his hypothesis on the assumption. 



