I' 0X0.0. A:3 



U07-UU0), of 1950. 



Available names of the genus Heterodera are listed in Table 1. Identi- 

 fication of some of these by characters of the cysts and contained egzs 

 and lai-vae is doubtful, and it is possible that some of the species are 

 not valid. Tlie final answer to this question must await careful study 

 and description of the males, females, and larval stages. It should also 

 be mentioned that while the writer is certain there are a considerable 

 number of undescribed species, very few cysts have been seen which could 

 not be placed in one of the species groups described below. 



Species formerly referred to this genus are as follows: 



H eterodera radicicola (Greef, 1872) Miller, I88U, was shown by Goodey 

 "0-932) to be a species of another genus and is now known as Ditylenchus 

 radicicola (Greef, 1872) Filipjev, 1936. 



Heterodera vitis Phillipi, I88U, was shown by Giard (I89U) to be an 

 insect MaTgarodes vitivim (Phillipi, I88U) Giard, I89U. 



Heteroder a javanica Treub, 1885, is a root-knot nematode, Meloidogyne 

 javanica TTreub, 188g) Chitwood, 19U9. 



Heterodera exigua (Goldi, 1887) Loos and Foaden, 1902, is also a root- 

 knot nematode, Meloidogyne exigua Goldi, 1887. (The species name was 

 misspelled exigua by Loos and Foaden.) 



Heterodera marioni (Comu, 1879) Goodey, 1932, is a root-knot nematode, 

 Meloidogyne marioni (Comu, 1879) Chitwood, 1952. 



Heterodera lupuli Filipjev and Schuurmans-Stekhoven, I9UI, is an obvious 

 error, H. humuli having been intended. 



Heterodera viale (Lavergne, 1901) Chitwood, 19ii9, is also an obvious error 

 of transcription for Anguillula viale. 



Special attention should be called to the fact that several additional 

 names to be found in Cooper's paper published in 1955 have no nomencla- 

 torial standing, having been specifically designated a provisional name 

 by the author. 



Table 1 



The Species of Heterodera wit h Type Hosts and Localities 

 The ===»=== 



Species: Type Host: Type Locality 



H. schachtii Schmidt, I87I Beta vulgaris Halle, Germany 



H. gottingiana Liebscher, 1892 Pisum sativum Gottingen, Gennany 



H. rostochiensis /Jollenweber, 1923 Solarium tuberosum Hostock, Germany 



