9^. 



Genus Paurodontus Thorne, 19^1 

 (Key to the species frcan Thorne, 19Ul) 



1. Length about 0.7 mm gracilis Thorne, I9UI 



Length about O.U inm 2 



2. Terminus subacute, tail somewhat arcuate densus Thome, I9UI 



Terminus acute, tail rather straight. ~~. \ T 3 



3. Head about half as wide as base of neck apiticus Thome, 19i;l 



Head almost as wide as base of neck niger Thorne, I9UI 



Genus Stictylus Thome, I9UI 

 (Key to the species) 



1. Tail length equal to 1/2 the vulva-anus distance 



asymmetricus Thome, I9UI 



Tail approximately equal to the vulva-anus distance 2 



2. Tail cylindroidj terminus blunt, almost flat. . . mycophilus Ruhm, 1956 

 Tail tapering; terminus bluntly conoid to conoid 3 



3. Tail terminus dorsally convex-conoid psuedobtusus Ruhm, 19^6 



Tail uniformly conoid ~~. '. ~. TT .... U 



U. Basal bulb of esophagus ovate with triquetrous lumen 



obtusus Thorne, I9UI 



Basal bulb of esophagus elongate, conoid; lumen not triquetrous . . 5 



5. Posterior uterine sac present . . . stammeri ("rfachek, 1955) Ruhm, 1956 

 Posterior uterine sac absent pini (Fuchs, 1929) Ruhm, 1956 



Genus Thada Thorne, I9UI 

 (Key to the species from Thome, I9UI 



Cuticle marked by only transverse striae striata Thome, I9I4.I 



Cuticle marked by both transverse and longitudinal striae 

 cancellata Thome, I9UI 



Genus Nothotylenchus Thome, I9UI 

 (Key to the species modified from Thorne, I9UI) 



1. Basal esophageal bulb elongate-cylindrical 



cylindricollis Thorne, I9UI 



Basal esophageal bulb tapering 2 



2, Terminus rounded, incisures 6 affinis Thorne, 19U1 



Terminus acute, incisures U 3 



