10 Mr. Miittlu'W.s' Rci^hj to (Uifidsin.^. 



pages of the Eeview must have conveyed the infection. I can 

 never forget the kind maimer in which Dr. Dohrn assisted me 

 in my work, and however we may differ in our opinion of other 

 men, I trust our regard for each other may remain unchanged. 



To iieviewers, who in a work which has carried the oral 

 anatomy of Coleoptera to heights never before attained, and has 

 revealed functions of certain organs previously unthought of, can 

 find nothing more worthy of notice than errors in the letter-press 

 and supposed defects in the plates, I need not reply ; their own 

 remarks prove the spirit by which they were inspired, and 

 supply an answer to themselves. 



^Is L do not intend again to revert to this subject, I avlII add 

 a few words on the anatomy exhibited in the pages and plates 

 of the " Trichopterijgia Illndrata." In the Appendix I have 

 given a detailed list of the vast number of preparations which I 

 made, in order that by comparing them with each other I might 

 obtain a correct idea of the true outline of each separate organ. 

 These preparations have been minutely examined and compared 

 with my figures by Drs. Le Conte, Horn, and Sharp, and by 

 Messrs. Crotch, Wollaston, and Janson, who all concurred in 

 affirming the accuracy of my delineations. If anyone should 

 still feel sceptical on that point, my preparations are open to his 

 inspe(;tion, and can be selected by the numbers affixed to them 

 in the list, lliey are preserved in Canada Balsam, which up to 

 the present moment has retained its pristine transi)arency. 



