46 Department of Zoology. 



1879-1881. Hewitson bequeathed to the Trustees his celebrated collection of 

 Exotic Butterfles ; it consisted of 24,625 specimens referable to 

 5795 species, and including numerous types described by the 

 testator in his " Exotic Butterflies " and " Diurnal Lepidoptera." 

 The collection was in a perfect state of arrangement and pre- 

 servation, and, by Mr. Hewitson's direction, a catalogue of its 

 contents was prepared and printed at the expense of his estate. 

 The Trustees accepted a condition attached by the testator to his 

 bequest, viz., that the collection should be called the " Hewitson 

 Collection," and that the specimens should be kept in good order, 

 preservation and condition, and in the same cabine'ts, and in the 

 same order and arrangement, and under the same nomenclature, 

 as they should be in at the time of his decease, until the 

 expiration of twenty-one years from that time. 



Other important collections of named Lepidoptera were 

 acquired by purchase : the Wollaston Collection of St. Helena 

 Lepidoptera (364 specimens) ; the first half of the Grote Collection 

 of North American Lepidoptera (3247 specimens) ; a selection of 

 1062 specimens from the Lidderdale Collection made in Sikhim 

 and Bhotan. Lord Walsingham presented 476 specimens of 

 North American Microlepidoptera, including the types of 118 

 new species, described by him in the fourth part of the 

 " Illustrations." 



9. Dr. J. S. Baly's collection of Phytophagous, and Mr. 

 Frederick Sates' Heteromerous, Coleoptera were purchased in 

 instalments : the portions purchased of the former amounted to 

 9898, and of the latter to 8602 specimens, mostly named. 



10. The late Mr. F. Smith left a collection of Hymenoptera 

 which he had formed before entering the service of the Trustees ; 

 a selection of 3445 specimens, including 554 types, was purchased, 

 as was another selection of 7898 named specimens from 

 H. Buchecker's collection of Swiss species. ^ 



Although the accessions of these three years to the Entomo- 

 logical Section amounted to the very large number of 77,000 

 specimens, and, therefore, might appear to have added greatly to 

 the difficulties with which the entomological staff had to contend, 

 it should be remembered that some 60,000 had been examined 

 and named by their former owners, who were authorities in their 

 special branches. Therefore these acquisitions, on the other 

 hand, facilitated the determination and arrangement of unnamed 

 material, and involved not much more work than that of 

 incorporating them. As mentioned above, the lepidopterist was 

 saved this work as far as the Hewitson Collection was concerned, 



