X82 [January, 



" Duncan heads the page (222) with ' Scopelodes unicolor, West- 

 wood,' and the insect is described from Hope's collection, but I cannot 

 see it anywhere mentioned that you furnished the characters, or any 

 portion of the letter-pt^ess — the advertisement at p. xi says, ' For many 

 of the illustrations we have been indebted, as on former occasions, to 

 Mr. Westwood.' 



" Some of the Plates bear ' J. O. Westwood, delt.,' but Plate 28, 

 which figures the Scopelodes in question, bears no such indication. 



" The question I would put to you is this — whether James Dun 

 can or J. 0. Westwood wrote the letter-press relating to Scopelodes 

 unicolor ? 



" As similar questions may some day arise as to other insects 

 treated of in this volume, it would be very desirable (if not taxing 

 your memory too much) to solve such problems once for all, whilst 

 you are still a working Entomologist." 



In reply to this appeal, Professor Westwood has very kindly 

 sent me a complete account of his connection with the Entomological 

 volumes of Jardine's Naturalist's Library, which I therefore printj 

 in extenso : 



Walton Manor, Oxford : 



December 1st, 1884. 

 Tour enquiry concerning my Scopelodes unicolor affords me ai 

 opportunity, of which I am glad to avail myself, of setting mysel 

 right, with my brother Entomologists, as to the extent of my share h 

 the production of the seven volumes on Entomology forming a portioi 

 of " The Naturalist's Library by Sir William Jardine," namely : 



"Introduction to Entomology, Vol. I, by James Duncan, M.W.S.,', 



1840. 

 "Entomology, Vol. II, Beetles, by James Duncan, M.W.S.," 1835 

 " Entomology, Yol. Ill, British Butterflies, by James Duncan, M.W.S.,' 



1835. 

 " Entomology, Yol. IV, British Moths, Sphinxes, &c., by James Dunj 



can, M.W.S.," 1836. 

 "Entomology, Vol. V, Eoreign Butterflies, by James Dunca: 



M.W.S.," 1837. 

 " Entomology, Vol. VI, Bees," 1840. 

 "Entomology, Vol. VII, Exotic Moths, by James Duncan, M.W.S., 



1841. 



I may say, at starting, that of Volumes II, III, IV and V I kno\| 

 no more of their authorship than is given on their respective title 

 pages as above, and that I had no personal acquaintance with Mi 



