272 Appendix to the Proceedings 



relation to the geographical distribution of species, I propose 

 to give a list of all which I have received, intercalating de- 

 scriptions of those which are new, with figures of the most 

 striking. I shall have my labours in this respect a good deal 

 curtailed by some of our most eminent entomologists, who are 

 working at Monographs of particular groups. To them I have 

 thought it right to entrust the new species in each of their de- 

 partments; and these have either been already described and 

 published, or are in course of being so. M. Chevrolat has de- 

 scribed about a hundred of the new Longicorns ; M.Boheman in 

 his Supplement will describe between twenty and thirty new Cas- 

 sidce ; Mr. Westwood occupies himself with the new Megalopidce, 

 and M. Suffrian has already published the new CryptocephalicUe. 

 The new Elateridte are in the hands of M. Candeze, the first 

 volume of whose work on that great family is already in the 

 hands of entomologists. 



I am very sensible that in the following pages I shall un- 

 avoidably occasionally fall into the error of describing as new, 

 species which have been already described by other authors. 

 The immense number of descriptions of species scattered through 

 foreign Journals and Transactions of Societies, renders it hope- 

 less to expect to escape such mistakes. I see the ablest and 

 best-informed entomologists, both at home and abroad, con- 

 stantly falling into them, and I am not so unreasonable or self- 

 confident as to expect a better fate. All I can say is, that when I 

 do commit such errors, they are made " not in consequence of 

 neglect, but in spite of attention." 



That such errors are not much more numerous than they will 

 be found to be, is greatly owing to the kindness of my friends, 

 Mr. Adam White of the British Museum, MM. Chevrolat and 

 Reiche of Paris, and Herr Dohrn of Stettin, who have on 

 every occasion laid freely open to me the extensive stores of 

 information which they possess, — an assistance the value of 

 which only those who have been engaged on similar works can 

 justly appreciate. 



I have not attempted to make this a work of synonymy, but 

 in recording the species which have been already described, I 

 have simply confined myself to giving their names, with one 

 reference to the place where a description will be found ; and 

 while I have endeavoured to follow the rule of priority in select- 

 ing the name of the species, I have by no means followed that 

 rule in choosing the reference to the description (the oldest de- 

 scriptions being generally the most insufficient), but I have 

 chosen that which appeared to me the best and was at the same 

 time most generally accessible. 



