P.'ira3. D:? 



adeqiiato descriptions and which are occasionally in conflict. Differ- 

 ences in hosts, rather than morphological differencen of the nematodes, 

 were sometimes the criteria used for setting up a species. The text- 

 book by Pilipjev and Stekhoven (I9UI) is a good reference for this 

 genus and is provided with a taxonomic key, descriptions, and bionomics 

 for many of the species. A recent paper (Allen 1952) presents a recon- 

 sideration of important foliar species which is based entirely upon 

 the comparative morphology of the nematodes. The result is a synony- 

 mizing of numerous species previously regarded as distinct on the basis 

 of the host involved. 



Literature Cited 



1. Allen, M. W. 19^2. Taxonomic status of the bud and leaf nematoc3'2S 

 related to Aphelenchoides fragariae (Ritzema Bos L891) . Proc. 

 Helminth. Soc. Washington 19(2): 108-120. 



