g INTRODUCTION. 



an appointment, which enabled him to pursue a favourite science on a rich territory 

 of immense extent, as yet but very imperfectly explored, and on his advancement to 

 a station combining a liberal compensation of services with high respectability. Their 

 sentiments, as far as regarded Mr. Macleay, were purely congratulatory, yet the disap- 

 pointment occasioned by his removal, was to them, individually, a cause of unfeigned 

 sorrow. They considered the beneficial effects of his past labours on natural history, 

 and more immediately on zoology. A small association of members of the Linnean 

 Society had been recently formed, for pursuing with more immediate purpose zoo- 

 logical inquiries. This association, established with the entire sanction of the parent 

 Society, whose object embraces natural history in its whole extent, was under 

 particular obligations to Mr. Macleay, and viewed his departure with peculiar 

 solicitude. Its meetings, which had often been enlivened by a luminous exposition 

 of his views and by his affable instructions, were to be deprived of this advantage. 

 The opportunity of consulting his universal experience, in difficult and undetermined 

 points of affinity and arrangement, not only in entomology but in zoology generally, 

 was to be lost. But no individual belonging to this small association felt this 

 privation more strongly, or was more immediately affected by the event, than the 

 individual, whose province it now is to continue, a portion at least of the design 

 which Mr. Macleay had proposed to himself. The expectation of seeing the result 

 of my entomological labours in Java brought before the Public under the favourable 

 circumstances above mentioned, and receiving the illustration of the comprehensive 

 views of Mr. Macleay, had been an object of sincerest gratification ; and the suspen- 

 sion, if not the entire interruption of his original design, had caused me proportionate 

 concern. Several months elapsed before I was able to form any determinate 

 resolution. At length I was roused from my reluctance to engage, in any manner, in 

 a work, which had been commenced by Mr. Macleay with such distinguished ability, 

 by the consideration of the necessity of bringing the result of my labours before the 

 Public, however imperfectly I might accomplish it ; and it is now my business to 

 state explicitly, at the commencement, that the present undertaking, although com- 

 piled from the same materials, is not a continuation of the Annulosa Javanica; that it 

 does not in any way interfere with the plan of Mr. Macleay, but forms a distinct 

 work, in which I propose to give a Catalogue of the Lepidopterous Insects belonging 

 to the entomological collection made by me in Java. 



But although I have so distinctly declared that the present undertaking is not a 

 continuation of the Annulosa Javanica, yet it will be conducted with a steady 

 reference to that work and to the Horag Entomological The plan of the former will 

 be my constant guide, and the comprehensive views detailed in the latter will afford 

 the means of regulating the arrangements suggested by the former, and of compar- 

 ing: 



