8 



During his enforced absence from the Department ]\Ir. 

 Shelford was able to carry out a very valuable and laborious 

 piece of work in the preparation of manuscript generic and 

 specific indices for the 442 genera and 2,244 species of 

 Hesperidae recorded in Dr. G. B. Longstaffs manuscript list 

 (see Section 12). 



9. Work on the Collection of Pierinac. 



Dr. F. A. Dixey has been chiefly engaged in incorporating 

 fresh material in the general collection of Piermae. A large 

 number of specimens has been dealt with, especially those 

 collected by Dr. G. B. Longsiaff in Ceylon, and the Rev. 

 K. St. Aubyn Rogers in British East Africa. The excellent 

 data accompanying the specimens sent home by these col- 

 lectors make their addition to the series extremely valuable. 

 Particular attention has been given to the genera Pinacopteryx 

 and Terias. The Hope Collection has for some time past 

 been accumulating material which will greatly facilitate the 

 future elucidation of these difficult groups, a work which is 

 much needed. Dr. Dixey also in the course of the year so 

 far completed his investigation of the scent-distributing' struc- 

 tures of the Pierinae as to make it possible to publish the 

 chief results of his observations. These have been recorded 

 in the Presidential Address delivered by him to the Ento- 

 mological Society of London in the present year. 



10. Rearrangement of the British Beetles. 



Commander J. J. Walker has continued to give the kindest 

 help in this great work. The Buprestidae and Elateridae 

 have been completed, and the Staphylinidae, begun in 1909. 

 The valuable results of Commander Walker's labours will 

 appear in the Report of next year, when the final arrange- 

 ment of the British Car abides, completed in the present year, 

 will be described, and the remainder of Mr. W. Holland's 

 splendid gift of British beetles of this group acknowledged. 

 It is possible that other groups also will be arranged within 

 the present year. 



1 1 . Work upo7i the Biirchell Collections. 

 The two papers published by Mr, J. C. Moulton, Magdalen 

 College, early in 1909 (see p. \^), completed the account of 



