146 



EXHIBITS. 



The following exhibits were made at Oxford, and the respec- 

 tive exhibitors attended at various convenient times to furnish 

 explanations and information. 



I._Dr. F. a. Dixey, F.R.S. 



The PierincE. 



A specal exhibition of butterflies belonging to the subfamily 

 Pierinœ was arranged. The exhibition was contained in about 

 260 cabinet drawers, which were displayed on three long tables 

 in a room situated in the Department of Zoology, kindly lent for 

 the purpose by Prof. G. C. Bourne, F.R.S. It comprised 

 about two-thirds of the whole collection of Pierina: belonging 

 to the Hope Department. To each genus and species a map 

 was attached, coloured to show the geographical distribution. 

 Beside every specimen was placed a label giving precise data 

 of the time and place of capture, with the names of the captor 

 and donor, when known. Corresponding labels were afhxed to 

 each specimen. \Mthin the limits of each species, a definite 

 order was observed with regard to locality ; and within each local 

 group the specimens were arranged according to the date of 

 capture. Attention was drawn by special labels to the seasonal 

 variations of a species, wehere these existed. 



The Hope Collection of Pierines is especially rich in forms 

 from the Ethiopian Region, the genus Teracolus being especially 

 well represented. In this genus the phenomenon of seasonal 

 dimorphism is very prevalent, and the remarkable dift'erences 

 between the dry-season and wet-season phases of the same 

 species were copiously illustrated in the examples shown. 



The exhibition remained open during the whole time of the 

 meeting of the Congress, and was visited by many of the members. 



