40 ILLINOIS BIOLOGICAL MONOGRAPHS [250 



PART III 



Synopsis of the Eugregarine Records of the Myriapoda, Coleoptera, and 

 Orthoptera of the World 



INTRODUCTION 



The synopsis and list of parasites which follow were made in order 

 to obtain the essential features of all the known species of eugregarines 

 parasitic in three groups of animals so that in placing on record some 

 twenty odd species which I had found during the last year there would 

 be no danger of redescribing a species under a new name or of describ- 

 ing a new species under a name already used. It is hoped that the synop- 

 sis will be useful to future workers. 



Species have been included from the whole world and not from the 

 United States only, for many species of protozoa are notably cosmopoli- 

 tan and not restricted to definite areas. The study of gregarines is as yet 

 scarcely begun in the United States and very few species have been found 

 both in the Old World and in the New, but workers in the United States 

 must be on the lookout for Old World species and should not describe 

 forms new to this country as actually new species without considering 

 the parasites of other regions of the world. 



Every effort has been made to include in the synopsis all the species 

 mentioned in the literature. Sources of information are as follows : 

 Dufour (1837), Kolliker (1848), Stein (1848), Frantzius (1848), Die- 

 sing (1851), Lankester (1863), Minchin (1903), Labbe (1899), Sokolow 

 (1911), Ellis (1913b), indices of the Zoologischer Anzeiger from 1878 to 

 1895, cards of the Concilium Bibliographicum from 1895 to date, and 

 current periodicals : Archiv fur Protistenkunde, Archives de parasitolo- 

 gie, etc., for the past and present calendar years. To a great extent 

 these references have acted as checks on each other although the original 

 sources have not infrequently revealed other species not elsewhere men- 

 tioned. Many of the older species recorded in this synopsis do not ap- 

 pear in Labbe 's Sporozoa. 



Labbe repeatedly regards as synonyms species which occurred in 

 the same host genus or in allied genera without regard to whether or not 

 the species of parasites were identical. In most instances the species are 



