this through Chermes created species also the spherical Namatus leaf galls from Salix 

 which however has less value without the possibility of collecting the Salix-Species, 



(nothing is valueless, you will not misunderstand me) - with Riley already 



similar matters and a subsequent determination of the not unseeable. 



Not yet at all represented appear to me - as far as I can see now - in your other- 

 wise so rieh and overall remarkable yield which through Psylloden and through Anguillar - 

 ias begotten Cecidiums , the latter usually very unsightly, but other than from the 

 scientific, but also of great practical interest because of the harmfulness of some for 

 cultivated plants (cockle or arthritis sickness of the morning, Bra^ilian coffee tree - 

 roots, sickness, etc. ) I enclose several European samples so you will become familiär 

 with the present very unsightly new formations (knots, etc.) in case you have missed 

 these up to now, I do not doubt that these also will be found in North America. 



The majority of the objects of your collections consists of cynirtidae galls, which, 

 because of their conspieuousness, have been worked on by others, but therefor make 

 much more botanical work for me, and at any rate of the various groups (I hold or consider 



the order aecording to geological , because through my own Labors almost 



all of the rest are more familiär to me. . Cf American Cynipidae- feall literature e.g. I 

 still do not have R. H. Stretch & C. D. Gibbes: Galls on oak, made by Cynips, in 

 Proceed. of the California Academy of Sciences IV p. 260-266. These Proceedings are 

 not available in Berlin. I do not even know the year of publication, also do not know, 

 if they are the same discussions, of which the first part 185^-55 appeared as Proc. of 

 the Calif. Acad. of Natural Sciences. Also the Engelmann Biblioth. Zoologica as well 

 as Hagen 1 s Bibl. Entomologica leave me in the lurch, so that I surmise the discussion 

 appeared later than l86l - Do you think that any German library possesses this proceedings? 



I hope to reeeive a work which appeared in l88l by Ashmead about the Cynipidae galls 

 of Florida in Proc. Am. Ent. Soc. (p. IX, XV, XXIV). 



Finally my heartiest thanks for the Information about Tormentilla . If I had already 

 read AI. Braun» s Leben - which in this past winter has provided me with many truly 

 sublime hours ~~ before I started on my trip last summe r, I wbuld not have been in doubt 

 between Frankfurt a/0 and Frankfurt a/M. 



Sincerely, 

 Your thankfu;, 



Dr. Fr. Thomas 



P.S. In order to give you an approximate view of the manifold forms of mite-galls, I have 

 enclosed a few and ask you to please excuse the 1-1/2 day delay in mailing this letter, 

 caused thereby. 



