58 COLEOPTERA. 



ground in Sweden, or he would scarcely have hazarded so 

 broad and sweeping an assertion that a species which has 

 actually been taken within the same parallel of latitude, does 

 absolutely not exist in any part of that extensive country ; 

 indeed the Orkney Isles, where the species is found in plenty, 

 is in the same parallel of latitude with Stockholm, and can 

 hardly be considered (according to the rules of geography) 

 as part of Central Europe. 



M. Jacquelin-Duval's remaining observations have re- 

 ference to an alleged discrepancy between Dr. Schaum and 

 myself as to the identity of some of the Stephensian types; 

 which our author presumes to be all in favour of the correct- 

 ness of his own opinion respecting them. I think, however, 

 we shall find upon examination that in several of the in- 

 stances adduced, this alleged discrepancy exists more in 

 appearance than in actuality. Dr. Schaum invariably refers 

 to the Stephensian types ; my references are frequently given 

 to Stephens's Works, irrespective of the types. Now we are 

 w r ell aware that these do not always correspond, but that, on 

 the contrary, a considerable difference is often found to exist 

 between them ; it became absolutely necessary that my re- 

 ferences should be determined by some fixed rule, in order 

 to avoid endless repetition and confusion. The rule which I 

 adopted is stated in the " Preliminary Observations" to the 

 " Geodephaga Britannica," p. vii, and is briefly this : — 

 With respect to those species of Continental authors, which 

 are erroneously reputed to be British, the references apply 

 to the Stephensian representatives only (except where it is 

 otherwise stated) ; whilst with respect to the veritable species 

 of authors, which are correctly designated by Stephens as 

 British, the references are applicable to Stephens's Works. 

 luet us apply this rule. The first instance quoted by M. Jac- 

 quelin-Duval is B. guttula ; and here the latter portion of 



