CHAPTER II. 



THE HISTORY OF LITERATURE RELATIVE TO THE 

 TYROGLYPHIDJ1. 



THE literature relating to this family is rather volu- 

 minous, yet I believe it only contains five works which 

 can be considered as in any way attempts to monograph 

 the Tyroglyphidae of any one or more countries. These, 

 with one exception, are general works on the Acarina, 

 or on still larger groups of animal life ; three, viz. the 

 under-mentioned works of Canestrini and Berlese, are 

 in Italian and refer to the Italian species ; the other 

 two are in German. One of these, that by C. L. Koch, 

 refers to the German species ; the other, that by 

 Kramer, in 4 Das Tierreich,' refers to the Tyrogly- 

 phidae of the world so far as they are known. 



At the end of this book I propose to give a list of 

 the bibliography which I trust will be found to include 

 all, or most, of the books and papers published relative 

 to the family which are likely to be useful to the 

 student ; but there are a good many which seem to me 

 to call for a somewhat fuller notice than their mere 

 names. 



The system on which the literature is arranged in 

 this chapter is that the authors are arranged in the 

 chronological order of their respective earliest works on 

 the subject ; but when an author has been commenced 

 with, the whole of his writings which are mentioned in 

 this chapter are dealt with, although some of them may 

 be later in date than the earliest work by the next 

 author. Works which simply introduce one or two new 

 species are not mentioned in this chapter, unless those 



