55. 



FM.iily TYi,L.Ni:iIj;D.\E Ocrlcy, I8u0 

 (Key to the subfaiiiilies adopted from 'i'liornc, 191)1} 



1, Hetacorpus fusiform uxth distinct internal sclerotization ...... 



TILIi-lC;u;rf.'\i; (de han, I876) iiicol., 1922 P.5.V 



Metacorpus not b-lbcir, xjith little or no internal sclerotization. . .2 



2, Basal esophageal bulb bearing 9 stem-like basal extension 



" , PAUR0D01.iTIiI/^.E Thorne, I9I4I P.b5 



Basal esophageal bulb not bearin^^ a stem- like basal extension ... ,3 



3, Head framework octagonal, esophageal glands overlapping intestine to a 



greater or lesser extent l\iEOTILl:;NGHl!-:AE Thome, I9I4I P. 55 



Head framework hexagonal, esophageal glands not overlapping intestine 

 NOTlIOTYLENCmNiUL Thorne, I9I4I P. 55 



Subf ainily P.IURODONTINAE Thorne, 19l4l 

 (Key to the genera from Thorne, 19 Ul) 



1, Spear knobs symmetrical Paurodont us Tl-iorne, I9UI P. 56 



Spear knobs asynmfitrical, the ventre submedi an knobs much larger than 



the dorsal knob Stict ylus 'Iliorne, 19iil ^-56 



Subfamily KOTHOTYLiJ^IGIiimE Triorne, I9UI 

 (Key to tte genera from Thorne, 19 ill) 



1, Cuticle abnormally thick and deeply striated. . . . Thada Thorne, I9I4I P.56 

 Cuticle not abnormally thick, finely striated 2 



2. Speai^ with tylenchoid basal knobs .... . Nothotylenchus Thorne, 19lil P.56 

 Spear with flange-like basal projections, . . . Beleod orus Thorne, 19lil P'57 



Subfamily NEOTYLENCHINAE Thorne, I9UI 

 (Key to genera from Thorne, I9UI) 



1. Esopha,^us base fused with intestine, not set off in any manner 



Hexatylus Goodey, 1926 P. 58 



EsoDhagus base set off, bulb-like or with greatly developed glands. .2 



2. Intestine joining esophagus just back of nerve ring; glands lying free 



in the body cavity Deladenus Thorne, I9UI P. 58 



Intestine not joining esopha-;us near nerve ring; glands -within a 



basal bulb Neotylenchus Steiner, 1931 P. 57 



