30. 



16,, Iiip re^rion naiTowod, rounded, . . . . o » . . . iirii L'oirTi .is Thorn'.-, 19^.'> 

 Lip region broad, truncated 17 



17o Lateral fields marked by 2 incisur'-^s . <,.<,,», conirlia Tborne, 19!>5^ 

 Lateral fields without incisures, ...,». . paucisnnulnta Luc, 1^50 



18. Length near 1.2 nwi, ....o.............. «.»... 19 



Length near 1.7 mm . . , . , gracilis Thome, 1955 



19. Bisexual species with many males. ........ .typica de Man, 1921 



Monosexual species as far as is known 20 



20. Body narrowing rapidly behind vulva 



thienemanni (Schneider, 1922, 1925) Loos, 19il8 



21. Spear length 90-lOUu similis Thome, 1955 



Spear length 112-122u vidua Raski, 1958 



22. Terminus convex or irregular conoid to blunt terminus 23 



Temiinus hemispheroid 27 



23. Tail uniformly convex conoid ' 2U 



Tail irregularly conoid to blunt terminus 26 



2k. Vulva-terminus distance less than spear length 25 



Vulva-terminus distance one and one-half times spear length 



obesa Thome, 1955 



25. Spear length ll6-120u brevis Thome, 1955 



Spear length 69-83u epicharis Raski, 1958 



26. About 20 annules between vulva and terminus . . .aberrans Thome, 1955 

 About 55 annules between vulva and terminus . . striatula Thome, 1955 



27. Length 1.2 mm rotundicauda Thome, 1955 



Length about 0.8 mm 28 



28. Body with ventral contraction at vulva 29 



Vulva continuous with body contour nana Thome, -1955 



29. Spear length 86-lOOu arena ria Raski, 1958 



Spear length 120u . obtusa Thorne, 1955 



Genus Hemicriconemoides Chit, & Birchfield, 1957 

 (Key to the species) 



1. Tail somewhat subdigitate wessoni Chit. & Birchfield, 1957 



Tail blunt, conical, or pointed 2 



2. Tail bluntly rounded, brachyurus (Loos, 19U7) Chit. .& Birchfield, 1957 

 Tail conical and/or pointed . 3 



3. Body annules 120 or more; spear length over 70u 



gaddi (Loos, 19U9) Chit. & Birchfield, 1957 



Body annules approximately 100; spear length U8-56u 

 cocophilus (Loos, 19U9) Chit. & Birchfield, 1957 



