Paras, C:U 



KEY TO THE SPECIES OF PRATYLENQIUS 

 Sher-Allen, 1953 



1. Lip region with 2 annules (1 striation) 2 



Lip region with 3 or U annules (2 or 3 striations) 5 



2. Lateral margin of lips angular brachyurus (Godfrey) 



Lateral margin of lips rounded 3 



3. Body long and slender (L=0,U-0.7, A=25-UO), males numerous 



coffeae (Zimmennan) 

 Body short and stout (L=0.3-0.67, A=l8-26), males rare U 



U. Vulva (=V) at 75-80 per cent scribneri Steiner 



Vulva at 80-88 per cent minyus n. sp. 



5. Striations around terminus of tail pratensis (de Man) 



No striations around terminus of tail ~ — — — » 6 



6. Outer margins of cephalic framework prominent, extending 



posteriorly about two body annules, tail bluntly rounded 



thomei n. sp. 



Outer margins of cephalic framework nonmal 7 



7. Vulva 68-76 per cent, tail tapering to narrow rovinded 



terminus 8 



Vulva 78-8U per cent 9 



8. Three annules on lip region, males absent — zeae Graham 



Four annules on lip region, males numerous goodeyi n, sp. 



9. Postuterine branch short, length about equal to body width 



at vulva, tail broadly rounded penetrans (Cobb) 



Postuterine branch long, two or three times body width at 

 vulva, tail tapering to narrow roxinded terminus 



vulnus Allen and Jensen 



