BY J. AVEIQHT. 37 



was begun in 1846, and the last part was published in 1852. 

 Its publication added much to the reputation of its authors, and 

 brought them into correspondence with the leading entomologists 

 of the day. Of their co-operation in its preparation Mr. Hardy- 

 gives me the following note : — '' Working harmoniously, the 

 contributions to the Catalogue were pretty equally shared be- 

 tween us. Mr. Bold sent me the outline, with the references to 

 Stephens' 'Illustrations and Manual,' Curtis's 'British Ento- 

 mology,' "Walton's 'Papers in the Annals of Natural History,' 

 and Mulsant's writings, with his own notes on localities and 

 other observations. These references I examined, and added 

 others, as we had different sets of books, and filled in my own 

 observations. Then re-wrote the whole, including the introduc- 

 tory observations. With respect to the gathering of material we 

 seldom interfered with each other's collecting ground, and I be- 

 lieve never but once worked together in company, when we 

 visited Prestwick Car." 



The collecting grounds of Mr. Bold were the southern parts 

 of Northumberland, on to the borders of Cumberland, with occa- 

 sional visits to Marsden and Boldon Plats, and to Axwell and 

 Gibside, in the county of Durham. Those of Mr. Hardy were 

 the northern portion of the county of Durham, and also the 

 northern parts of Northumberland, including the Bamborough- 

 shire district and the neighbourhood of Wooler and the Cheviots. 

 After the publication of their Joint work Mr. Bold assiduously 

 continued his labours and increased his collections, the results of 

 which were recorded in the Transactions. 



In 1870, nearly twenty -five years after the publication of the 

 Catalogue, he presented to the Club a revision of it. During the 

 period which had elapsed the number of species found in the dis- 

 trict had increased by a third, and the nomenclature of the Coleop- 

 tera had undergone a revolution, necessitating a review of what 

 had previously been done. This laborious revision, which led to 

 the new edition of the Catalogue, was entirely the work of Mr, 

 Bold, and it met with a most favourable reception from the lead- 

 ing entomologists of the day. 



In Yol. I. of the Natural History Transactions is published a 



