71. 



Genus Aphelenchoides Fischer, I89U 

 (Partial key to species of Subgenus Aphelenchoides, Fischer, I89U) 



1. Buccal spear not split at its base, either swollen at base or with- 

 out such basal swellings. Plant parasitic species or free living 

 forms (a long-tailed species irakes an exception to this rule and 



lives in the tunnels of bark beetles) , . 2 



Spear split at its base up to the posterior third. Living in 

 association with insects 



caprifica (Gasparrini, I87I) Filipjev & Stekhoven, I9hl 



2. Tails of both sexes not flagellate 3 



Tails of both sexes with a long slender flagellum 35 



3.a)Body more or less cylindrical, female tail cylindrical, cylindro- 



conical, finger-shaped, with or without a mucron at tail tip. ... I4. 



b)Female tail elongate, more or less effilate but with no typical 



flagellumj male tail conical, ending with an acute point 11 



c) Female tail as well as male tail short conoid, distinctly tapering to 

 terminus; terminus with or without mucron I3 



U. Tail without mucron; terminus uniformly smooth 5 



Tail with mucron; or terminus subhemispherical with a central 

 "dimple" 9 



5. Female tail cylindro- conoid 6 



Female tail cylindrical or fingershaped 7 



6. Esophageal bulb situated 3.5 X its length from anterior extremity; 



male tail terminus acute talonus Thorne, 1935 



Esophageal bulb large, situated 2 X its length from anterior 

 extremity; male tail terminus rounded macrobulbosa Ruhm, 1956 



7. Female tail cylindrical 8 



Female tail finger-shaped limberi Steiner, I936 



8. Head distinctly off-set, lips prominent . . . xylophilus Steiner, 193U 

 Head not off-set, lips not prominent solani Steiner, 1935 



9. Female tail cylindrical with well developed truncate or filiform 



mucron subtenuis (Cobb, 1926) Steiner & Buhrer, 1932 



Female tail finger-shaped; terminus sub hemispherical with a central 

 "dimple" 10 



10. Female 1.1 mm long; V = 66^ 



abyssinicus (Filipjev, 1931) Filipjev &. Stekhoven, 19lil 



Female 0.7 mm long; V= 77% retusus (Cobb, 1927) Goodey, 1951 



