THE YOUNG NATURALIST. 



315 



in a very complete state, and who are 

 needing something new to turn their 

 Attention to — that the addition of para- 

 sites that prey upon the various species 

 will not only make their cabinets very 

 much more perfect, but they will find 

 in their endeavour to procure them 

 they have new worlds to conquer and 

 new discoveries to make. 



[Mr. Porritt has our thanks for all these, 

 i The ichneumons we cannot name at present, 

 but v ill submit them to competent authority 

 at the first opportunity. The dipterons are 



Ex or i :.'( .' vu I star is. — Eds.] 



TO CORRESPONDENTS. 



We are obliged to Mr. Thos. Tritschler for 

 larva? of A . tritici, and ichneumon cocoons 

 from the same species. 

 ), Weiss, Heidelburg. — We shall be very 

 glad to receive the promised larva:. We 

 mi^ht be very many years before we ob- 

 tained them here, 

 vlrs. Hutchinson, Leominster. --Many thanks 

 for the ichneumoned larvae of N. albulalis. 

 We once had larvae of P. geryon affected in 

 the same way, not full grown, and fixed to 

 a leaf, with the ichneumon in pupa inside. 

 Our specimens were smashed in the post, 

 and it will be interesting should we obtain 

 it again to ascertain its relationship to 

 those you .send us, which we will endeavour 

 to have named so soon as they emerge. 

 W. C, Bradford. — The dipteron bred from 

 Saturnia carpini has been named for us by 

 Dr. Meade. It is Exorista grandis. Zett. 



CORRESPONDENCE. 



PARASITES. 

 Dear Sirs, — With this I send alive nine 

 pecimens of an ichneumon bred from some 

 iotys verticalis larvae I brought from Wicken; 

 lso some dipterous parasites from 0. pota- 

 via ; and some larvae of Noctua rubi to 

 .gure, reared from eggs on dock, all from 

 Vicken. — -G. T. Porritt, F.L.S., Hudders- 

 eld. 



PAPERS ON FERNS. 

 Sir. — As one of the supporters of the Young 

 Naturalist I feel great interest in the journal, 

 and beg to state that I should have great 

 pleasure in furnishing you with papers on 

 " British Ferns " should you deem the sub- 

 ject within your sphere. Having studied 

 Botany practically and theoretically, and making 

 the Fernery one of my special hobbies I 

 thought it would be a subject of great interest 

 to a many Naturalists if space and approval 



| should allow. Apologising for taking the 

 liberty of presenting you with this gratuitous 



> offer. — I am, sir, yours truly, H. Andrews. 

 19, The Terrace, Camberwell. 

 \\ e shall be pleased to receive your 

 papeis on Ferns. We wish to vary the con- 

 tents of the Young Naturalist as much as 

 possible, and admit a deficiency of botanical 

 matter.— Eds.1 



BRITISH BUTTERFLIES. 



By J. E. Robson ; with figures from life by 

 S. L. Moslev. 



(Assisted by Contributors to the Y. N.) 



Genus VI, Aporia. 



Doubleday and Westwood include the 

 genus Aporia with that of Pieris, and Kirby 

 does the same in his synonymic catalogue; 

 I but in his work on European Butterflies, and 

 in that now publishing on European Butter- 

 flies and Moths, he recognises it as a distinct 

 genus. Dr. Staudinger also recognises the 

 genu.:, and places it between the thinly 

 scaled Parnassus (Papilionina) and Pieris. 

 The transparent appearance of our solitary 

 British species makes this seem appropriate, 



