IN SEARCH OF ENTOMOLOGISTS. 131 



and Stettin. My object in wanting to visit Frankfort was to 

 see the Collection of Senator von Heyden ; when at Glogau 

 Professor Zeller had mentioned to me the name of a Herr 

 Schmid, whom it would be desirable for me to see (future 

 events have shown that he was indeed a very desirable 

 person for me to see). But, as I was saying, we left Cassel 

 at 8 a.m., and it being an express train, we accomplished 

 the distance, 124 English miles, in six hours and a half! It 

 was a tremendously hot day. We went to the Hotel de 

 l'Empereur Romain, and after dining I sallied forth, and 

 called on an old correspondent of mine, Herr Gabriel Koch 

 (the author of the "Geographische Verbreitung, &c." see p. 

 153). Having looked over his Collection he took me to Herr 

 Schmid, with whom I spent some hours; the information 

 obtained from him is too numerous to be here detailed. I 

 borrowed from him a manuscript of his " Observations on the 

 Tineina," their transformations and habits, from which, the 

 following day, I extracted nearly three pages of foolscap of 

 valuable information. 



But oh! that following day what a hot day it was! I 

 never was so nearly melted in my life ; but at the same 

 time I was so very busy that I had not even time to melt. 

 At an early hour I visited Senator von Heyden, whose 

 Collection, as is well known, is arranged, not in a Cabi- 

 net, but in little boxes on the shelves of a book-case; here 

 I had a rich treat, on every point my worthy host was 

 well supplied with information ; and among a few of the 

 interesting novelties I saw Argyresthia Icevigatella from 

 Pinus larix, and A. copiosella from P. cembra in Switzer- 

 land, and a very pretty new Gracilaria-i'orm insect, frigi- 

 dariella, which Senator von Heyden had bred from cones 

 on the Alpine willow in Switzerland; here also I became 

 convinced of the existence of a distinct third species of 

 Nepticula on the rose — Nepticula centifoliella. This diners 



