G :Mi-. Mattla'^v^^' Rrphj U, Vritlcl^ins „„ 



have many times been compelled to accept his species in contra- 

 diction to my preconceived opinion. 



Dr. Dohrn asks whether 1 expect him to accept Motschulsky's 

 "99 species" on my authority ] If he will refer to my work he 

 will find that I expect nothing of the sort, I do expect that 

 those species which I have verified by the careful examination 

 of types will be accepted, and am fully jjrepared to support my 

 position, and Dr. Dohrn must remember that their acceptation 

 will not wholly depend upon his opinion. 



But let us axamine this matter more closely. The actual 

 number of Motschulsky's newhj-named species amounts to 85, 

 and of these only 25 appear in my list of recognized s])ecies. 

 Of the 43 supposed new species which I have verified by actual 

 examination, 2 only appeared to be varieties, while 41 were good 

 and distinct species; of these last, 16 had been previously 

 described by other authors, and 25 were whoUy new to science. 

 Upon such facts it is only fair to conclude that a large majority 

 of the other 42 which he has described would probably be true 

 species. The rest of his names are merely manuscript without 

 definition. 



In the year 1845 the combined efforts of all other Entomolo- 

 gists had resulted in the discovery of 37 species of Trichop- 

 terygia, while at that same period Col. Motschulsky was 

 acquainted with more than twice that number, of Avhich above 

 one-half were the fruits of his own persevering exertions in then- 

 piu'suit and superior knowledge of their habits. Well and 

 truly then might I say that "his knowledge of the Trichop- 

 terygia exceeded that of any other Entomologist." 



To contradict this assertion Dr. Dolu-n brings forward the 

 fact that Motschulsky had at one time considered the Trichop- 

 terygia to possess pentamerous tarsi. I need not again recount 

 mistakes of a character quite as important made by professetl 

 anatomists to prove that the wisest among men are liable to 

 error, others have committed the very same mistake, and such 

 indeed was at one time my own impression. The tarsi of a 

 Trichopteryx are surrounded by very long diaphanous seta% 

 which in mounted specimens wiU occasionally cross the long 

 terminal joint of the tarsus in an oblique and so perfectly natural 



