35. 



26. Length .30-,U5 mm. 5 head and tail not blunt-tmncate (tail of omatiira 

 somewhat truncate) ....«..,..,.....■ 27 



Length »60 mm.; head and tail both blunt-truncate 



rustlcum (Micoletzky, 1917) Taylor, I936 



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27^ Sublateral lobes absent . . « . o , . , 29 



Sublateral lobes present. ...».o ».,,,... . 28 



28. Anterior flap of vulva forming 2 definite points; larvae with longi- 

 tudinal cuticular fringe; males unknown , « , . . . omatum Raski, 1958 

 Anterior flap of vulva bilobed, rounded; larvae without cuticular 

 markings; males common ,= .,,.,..,,. , curvatum Raski, 1952 



29. Lip region plain; amphids small and round or indistinct .30 



Head with 6 indistinct lips; amphids large, oval; spear 53 microns; 

 total body annules 70 , . . . tulaganovi (Kir'ianova, I9U8) Haski, 1958 



30. Single gonad; vulva on 5-6th annule from terminus; amphids indistinct 



. e .»»..... o .... , . pullum (Kir'ianova, 19U8) Paski, 1958 

 Paired gonads; vulva on 8th annule from terminus; amphids small, 

 rounded on 2nd and 3rd annules 



...... tenuicute (Kir'ianova, 19U8) Raski, 1958 



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Genus Cacopaurus Thome, 19U3 

 (Key to species ) 



Three lines in the wing area; punctations in cuticle 



Four lines in the wing area; absence of punctations 



. . epacris Allen & Jensen, 1950 



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Genus Belonolaimus Steiner, 19U9 

 (Key to the species ) 



Spear length I55u or more; tail length approximately 3 anal body 

 diameters .«<,«,.,..,,..,...,. gracilis Steiner, 19U9 

 Spear length 13 5u or less; tail length approximately 5 anal body 

 diameters . .,,,...» ....„,., , .longicaudatus Rau, 1958 



Genus Dolichodorus Cobb, I9IU 

 (Key to the species) 



1. Spear less than 90u long. ,,.,,.,...,, similis Golden, 1958 

 Spear more than lOOu long ,..,,,,,.,.,..',,,,.,. 2 



2» Mature female tail pointed; 3 incisures in lateral field 



'•""...c^o^. .......... heterocephalus Cobb, 191U 



Mature female tail rounded; k incisures in lateral field 



• •••<■»••»». «.«....«...... obtusus Allen, 1957 



