tion for the working out and arrangement of that family. 

 Mr. G. H. Verrall, F.E.S., and Mr. J. E. CoHin, F.E.S., aiso 

 rendered much kind assistance in this Order of Insects. 



The kind help of Dr. F. D. Godman, Hon. D.C.L., F.R.S., in 

 naming the South KvatxxQ.'a.w Hesperidae has been acknowledged 

 in an earlier Report. The Old World species have been very 

 kindly undertaken by Mr. Hamilton H. Druce, F.L.S., F.E.S. 

 This great work is now complete and the specimens have been 

 brought back to the Department. As soon as Mr. Druce's 

 determinations have been placed upon them, the whole col- 

 lection will be arranged in the order followed in the British 

 Natural History Museum. No published list of this series 

 exists, but Dr. G. B. Longstaff most kindly undertook the 

 labour of copying out the names of the entire family, together 

 with those of the Satyrinae. The latter sub-family has been 

 arranged in accordance with his list, and the Hesperidac will 

 be undertaken during the present summer. Dr. Longstaff has 

 also expended much time and labour both in London and 

 Oxford, in working out the material presented by him to the 

 Department. On this material and on his observations he has 

 published the papers mentioned in Section lo. 



In the difficult groups of the South American Papilioninae 

 the mimetic resemblances are so perfect and misleading that 

 the classification believed to be based on affinity has been en- 

 tirely falsified in nearly every ]\Iuseum. Now, however, that 

 Rothschild and Jordan have published a splendid monograph 

 on these very groups, establishing their true relationship by the 

 study of structure, the difficulty is at an end. The whole of the 

 University material was reset and, packed in about 70 boxes, 

 was conveyed by hand to Tring. In spite of the immense num- 

 ber of specimens, the collection was so rapidly determined by 

 Dr. Karl Jordan that only two visits were required. Mr. J. C. 

 Moulton, B.A., Magdalen College, kindly assisted the Professor 

 on one of these occasions. Dr. Jordan's identifications have 

 now been affixed to all the specimens. 



The kind help afforded by Mr. Roland Trimen, F.R.S., 

 is indicated in Section 10. 



Dr. T. A. Chapman, F.Z.S., F.E.S. , in the course of his 



