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easily distinguished from any Oecidorayid larvse, and has been watched 

 in the newly-forming galls on wheat, and its feeding and development 

 observed. 



The Secretary read the following extract from a letter from Dr. Fritz 

 Miiller to Mr. R. Meldola:— 



"My brother, Dr. Wilhelm Miiller, a young man of twenty-seven years 

 of age, has been with me for nearly a year, and is at present diligently 

 studying the larvae of our NymphalitKS. He is likely to make some very 

 interesting observations, and has already reared a considerable number from 

 the egg to the pupa. We now know the larvae of the following genera of 

 NymphalincB : — Protogonius, Paphia, Siderone, Prepona, Apatura (?; imago 

 not yet bred), Arjeronia (five species), Myscella, Eplcalia, Didonis, Callicore 

 (? ; imago not yet bred), GyiKBcia, Heterochroa (ten species), Smyrna, 

 Victorina, Junonia, Phyciodes, Hypanartia, and Pyraineis. We also know 

 the larvae of Dione and ColcBuis ; but these genera do not belong to the 

 NytnphalincB, but are allied to Eueides and Heliconius. 



" The larvae of several genera or even groups of genera of Brazilian 

 Lepidoptera are confined to allied plants. Thus all our species of Heli- 

 conius (two), Eueides (two), Colccnis (two), and Dione (two), feed upon Passi- 

 fiorcB ; Phyciodes, Jnartia,Jicnouia, and Victorina ou Acanthaceos ; our five 

 species of Ageronia and Myscelia Orsis feed upon one and the same species of 

 Dalechavijiia ; our species of Epicalia and Didonis feed upon Atchornea and 

 Tragia respectively, plants belonging to the same family [Eup)horhiacea:), 

 and our two species of Siderone feed upon the same Casearia. On the 

 other hand, larvse belonging to other genera feed on j)lants belonging 

 to very different families. Thus some of the species of Paphia feed on 

 PiperacecB (like Protogonius), and others on Laurinece ; those of Prejjona 

 feed on Leguminosce (Juga), Monimice, &c. ; the larvse of Heterochroa feed 

 on Pmbiacece (five species), Cecropia (two species), Melastomeca (one species), 

 Rubus (one species), and Malpighiacecc (one species on Tetrapterys). 



•'Many young larvae of the genera Protogonius, Paphia, Siderone, Pre- 

 po)ia, Ageronia (except the gregarious larvse of A. Amphinotne and A. Ear- 

 nax), Myscelia, Epicalia, Gyncccia, and Heterochroa have the remarkable 

 habit of eating the space next to a vein of the leaf bare. My brother first 

 called my attention to this. All these larvse have the still more remarkable 

 habit of lengthening the stalk by attaching particles of dirt to it. The 

 small brown larvse are often difficult to distinguish from the withered 

 brown leafstalk, and must be admirably concealed from many enemies in 

 this manner. But the collector wlio has once discovered this habit can 

 easily detect the whereabouts of sucli larvse by the leafstalks, when he 

 would otherwise only be able to detect them by the closest observation. 



" My brother has made some very interesting observations, which 

 I believe to be quite new, on various pupa% which when in the dark are 



