596 APPENDIX. 



giving terms from Linne, Fabricius's works (except 'Fundamenta Entomo- 

 logia,' which K. has not an opportunity of consulting), Latreille's ' Genera 

 Ins.,' Scopoli, Schrank, Walckenaer, De Geer, Reaumur; W. S. Illiger and the 

 German entomologists, and ' Fundament. Entomolog.' Motions of Insects I 

 forgot : Kirby will take. Short accounts of books, W. S. The plan that strikes 

 me as the best, with respect to the parts which each undertakes, is this When 

 you or I have finished a letter, or (perhaps better) the whole of our parts, I to 

 send mine to you, and you yours to me, that each may make his observations, 

 and give his sanction to what the other has written, and add any particulars 

 omitted by the other that may have occurred to him. If you wish any altera- 

 tion made in the above apportionment of parts, you will state it in your next 

 packet ... ."* 



* The above extract is mainly given for the purpose of adding to it some further 

 explanation on the subject to which it refers. 



In our Preface, p. xxi. [here, and throughout this chapter, the 5th edition (1828) 

 is referred to] 1 , we have declined stating which letters were written by each ; and in 

 the thirty-seven years which have elapsed since we " excused ourselves from gratify- 

 ing the curiosity" to ascertain this fact (if any such were ever felt), no clue to "it 

 has been given, except the disclaimer by Mr. Kirby, in the advertisement to our 

 third and fourth volumes, of agreeing with me in opinion on the theory of instinct 

 in the letter on that subject, Vol. II., and the remarks, in Vol. IV. p. 1933 : both, 

 as he wished it to be stated, written by me. 



As this disclaimer, however, has broken the charm of secrecy, and as some future 

 ingenious entomologist may think it worth his while to endeavour, from internal 

 evidence, still further to solve the mystery, in attempting which he would be sure 

 to fall into gross errors, it has seemed "to me best (and Mr. Freeman coincides with 

 me) to give here the entire list of the letters of our work which were ultimately agreed 

 on, and which vary in some respects from that proposed above, with the name of 

 the writer affixed to each, and such observations as are necessary to make the in- 

 formation correct and complete. 



VOL. I. 

 Preface. Mr. SPENCE. 



[The two paragraphs relative to the religious bearing of the work, pp. xiii. 

 and xiv. [pp. xii. and xiii.] ; the first half of one at p. xvi. [p. xiv.], beginning 

 " The authors," &c., and one at p. xviii. [p. xv.], beginning " Besides these," 

 &c., were added by Mr. KIRBY.] 

 LETTERS. 



I. Introductory. Mr. KIRBY. 

 II. Objections answered. 



The first part, to p. 39. [20.] Mr. KIRBY. 



The second part, in defence of Systematic Entomology, pp. 40 53. [20 



27.] Mr. SPENCE. 



The concluding part as to cruelty. Mr. KIRBY and Mr. SPENCE. 

 III. Metamorphoses. Mr. SPENCE. 



From p. 7277. [37 40.], by Mr. KIRBY. 

 IV. to VIII. Injuries caused by insects. Mr. KIRBY. 

 IX. and X. Benefits derived from insects. Mr. KIRBY. 



[A large proportion of the facts, and several entire paragraphs and pages 

 in these seven letters, were furnished by Mr. SPENCE.] 

 XI. Affection of insects for their young. Mr. SPENCE. 

 XII. and XIII. Food of insects. Mr. SPENCE. 

 XIV. and XV. Habitations of insects. Mr. SPENCE. 



VOL. II. 

 LETTERS. 



XVI. to XX Societies of insects. Mr. KIRBY. 



XXL Means by which insects defend themselves. Mr. KIRBY. 

 , XXII. and XXIII. Motions of insects. Mr. KIRBY. 



XXIV. Noises produced by insects. Mr. KIRBY. 



i The pages referred to in this 7th Ed. follow between brackets. 



