150 F. Stoliczka — Monograph of Indian Passalidcd. [No. Zf 



parations for an expedition to Central Asia I am not allowed to do more, tlian to 

 shew those who assisted me that their materials had been duly appreciated. 

 My old fi-iend Dr. C. Felder, the Lord-Mayor of Vienna, has sent me the whole 

 of his collection of Passalidje for examination, and Dr. L. Kedtenbacher, the 

 Director of the Vienna Museum, sent me a great number of eastern spe- 

 cies. These are rare in&tances of liberality and ti-ue interest in the work. My 

 thanks are further due to Messrs. W. S. Atkinson and J. Wood-Mason, 

 Messrs. Peal (Assam) and Mandelli (Darjeeling), Major H. H, Godwin- 

 Austen, Major Beddome, Mr. Stahlknecht of Singapore, Mr. Theobald, Rev. 

 Baker, Dr. Cameron, the late Dr. Walter Abbey and the late Capt. Mitchell of 

 Madras. The original collection in our Museum contained only five of the 

 comraonest species. 



In recording the species I will follow Kaup's last Monograph on the 

 subject. Whatever opinion various naturalists may have regarding the mode 

 of classification which that distinguished author has adopted, I do not 

 think that they will find much fault with the limitation and characteristics 

 of the genera* and species. Undoubtedly that Monograph is the most 

 complete and the most remarkable paper which the philosophical school of 

 naturalists has in late years produced. I am now not prepared to say any- 

 thing for or against it, but I will do so in my Monograph, when I hope to 

 have examined a larger number of Passalid^, than I had been able to do 

 np to the present. Such mental production sf must not be disposed of with 

 prejudice, they are entitled to receive a fair trial and a full share of all opi- 

 nions 'pro and con, before we side one way or the other. Nobody will, after 

 careful perusal, deny the fact, that Kaup's classificatory arrangement has in 

 many respects very considerable advantages ; it is easy and practical, but 

 time and research must shew whether it can be adopted or not. Whenever I 

 shall have any scruples against generic definitions, or against the quinquennial 

 divisions, I shall state my reasons without any reference to the validity of 

 the whole system. 



Before proceeding to the details I have only to mention that I shall 

 include in the present list all the species known to occur in the East Indies, 

 viz., India proper (Vorder-Indien), with Eastern Bengal, Burma, and the 

 Malayan Peninsula as far south as Singapore (Hinter-Indien). 



Sul-fam. A TIL ACO CYCLING. 

 1. ArLACOCTCLrs Paeeti, Kaup. 

 I received numerous specimens from Malacca. 



* Even in tlie very limited sense in wMcli the anthor defines them, 

 t For a short exposition of the principles of the system, and a brief discassion 

 thereon, see Proc. of the Society for May, 1873. 



