X1Y INTRODUCTORY REMARKS. 



indeed, the merit of this Monograph (if any) is entirely owing ; it was 

 with him that I undertook the journey that originally suggested the 

 work ; he has, in furtherance of it, placed at my disposal all that I 

 required of his valuable entomological library ; and the least of his 

 kindnesses has been the contribution of the Frontispiece to the 

 volume, which contains, figures of those species that were captured 

 by ourselves during our excursion in Brazil. 



It may be well perhaps to state (lest any one should suppose that 

 time has been devoted to this work that might have been devoted to 

 more important subjects) that the following pages have been entirely 

 written during the early hours of the morning, before the serious 

 business of the day has begun. I can testify to the fact that 

 such studies are not merely not an impediment, but a congenial 

 recreation and valuable aid : indeed that this is the case that the 

 study of Nature is not incompatible with graver pursuits we have 

 the high testimony of the illustrious Bacon ; even he could find no 

 wiser counsel than the following, to offer, as his parting words, to 

 the students of his day : 



"Quamobrem et vos hortor, ut salva animi modestia, et erga 

 veteres reverentia, ipsi quoque scientiarum augmentis non desitis ; 

 verum ut post volumina Sacra Yerbi Dei, et Scripturarum, secundo 

 loco volumen illud magnum operum Dei et creaturarum, strenue, 

 et prse omnibus libris (qui pro commentariis tantum haberi debent) 

 evolvatis : Valete." 



