227 



Editors of Psyche : At the bottom of p. 147, v. 2, 1 have stated that 

 " I have never met with a LithocoUetis pupa in the winter or spring." 

 The reader will please interpolate the words " of the flat group" after the 

 word pupa, as it is intended to apply only to that group. So far as I have 

 ol)served, the species of the cylindrical group always hibernate as pupae; 

 and I have taken L. ornatella from its cocoons in January in both condi- 

 tions — as larva and pupa. The statement on p. 142 that Gracilaria 

 rohiniella undergoes the change mentioned at the fifth stage is incorrect. 

 LithocoUetis rohiniella does so; but G. rohiniella assumes that character of 

 trophi at the third stage. 



The statement that there are eight larval stages is perhaps made too pos- 

 itively. It is the conclusion to which I was led by careful examinations 

 of a great many larvae, and I am fully convinced that the number cannot 

 be less than seven. But owing to the difficulty in determining the matter 

 accurately (suggested at p. 138), there is a possibility of error. Whether 

 the number is eight or less the other statements in the jiaper are not affect- 

 ed thereby. The change in the character of the trophi and in the larval 

 habits takes place at different stages in the different groups. 



F. T. Chamhers. 



Covington, Ky., 16 Feh., 1879. 



Editors of Psyche : On reading my address to the Club, as printed 

 in Psyche, I find so many improvements that I hardly recognize my 

 own work and suggest the title should have been " The opinion of the 

 editors of Psyche as to what the second annual address of the president 

 should be." 



Although I have no doubt the printed address is much better than the 

 one actually delivered, still I do not wish to sail under false colors, and 

 trust you will give place to this little note in acknowledgement of the im- 

 provements made in it. 



I would also like to be permitted to suggest that I did not make any ex- 

 cuse for speaking of the geographical distribution of Coleoptera, but only 

 for not including the other groujis as well as Coleoptera. Neither do I 

 consider that Coleoptera possess any special advantages over other groups 

 in the study of questions of distribution as would be inferred from the 

 printed statement, in fact some other groups are no doubt better suited to 

 that purpose than the Coleoptera. 



A number of notes which I had prepared for insertion were omitted, as I 

 received no proof before the paper was printed. In the list of collections, 

 which I have indicated as containing material deserving of publication, I 

 have only included such as were known to me, either by personal inspec- 

 tion or from exchanges with the collectors. There are doubtless several 

 other equally valuable collections which should be included in a list. 

 Among others the collection of Mr. Henry Edwards, is probably the most 

 valuable in existence for Pacific coast species. 



