li 



other species were discovered by Prof. Trail, making nineteen new species 

 out of a total of twenty-three, and showing how unexplored a field is the 



Heraipterous fauna of the Amazons. Of the species now described the 

 more interesting are MesovcUa Mulsaiiti, the South American representative 

 of the European M.Jurcata, M. and IL Hitherto the genus lias been 

 monotypic. Martarcga is a new genus of Notonectidce of rather peculiar 

 structure ; and Heterocorira is a new subgenus (probably worthy of generic 

 rank) of Corixa, but approaching Sujara in the abymmetry of the 

 hemelytra. 



Mr. Frederick Bates communicated " Descriptions of new Genera and 

 Species of Tenehrionida from the Island of Madagascar." 



Mr. C. 0. Waterhouse read " Descriptions of new Coleoptera from East 

 Africa and Madagascar," and exhibited specimens of the new species. 



Mr. A. G. Butler communicated a paper " On the Natural Affinities of 

 the Lepidoptera hitherto referred to the Genus Acroxycta of Authors." 

 From an examination of the characters, chiefly of the larval stage, Mr. Butler 

 proposes to distribute the British Species of this genus as follows : — 



Fam. Arctiid.e. 

 Gen. Pharetra, Hiib. P. rumicis, F. auricoma, and allies. 



Fam. L1PARID.E. 



Gen. Acronicta, Ochs. A. leporina. 

 „ Artomyscis, Hiib. A. aceris. 



Fam. NoTODONTiD.p.. 



Gen.? A. meyaceplmla and allies. 



„ TricBna, Hiib. T. psi, T. tridens, and allies. 

 „ Hyboma, Hiib. H. stiiyosa. 



Tribe Noctuites. 



Gen. Jocheara, Hiib. J. alni. 

 „ Mamestra, Ochs. M. Uyiistri. 



In illustration of the foregoing paper. Lord Walsingham liad lent for 

 exhibition his collection of preserved larvae of this genus. 



