314 NEOTROPICAL PSELAPHIDAE 



6. XI acuminate at apex; vertexal foveae as near to each other as either 



is to the adjacent eye; 2.1 mm.; Venezuela frontalis 



XI obtusely rounded at apex; vertexal foveae mutually more distant 

 than either from the adjacent eye 7 



7. Palpal sulcus shortened, not reaching base 8 



Palpal sulcus entire; 2.3 mm.; Venezuela vesiculifer 



8. XI as long as four preceding united ; Venezuela clavicornis 



XI as long as five preceding united; 2.3 mm.; Colombia, .punctipennis 



9. Posterior tibia with a distinct apical spur of setae (this is not a sexual 



character) 10 



Posterior tibia without an apical spur; pubescence a rich yellow-gold 

 color, long and appressed; 2.2 mm.; Colombia bryaxoides 



10. Posterior tibial spur short, thick and obtuse; 3.1 mm.; Venezuela 



globifer 



Posterior tibial spur fine, aciculate, usually sharply angulate or 

 recurved 11 



11. IX and X very short and so transverse that they appear as disks; 



head much wider than pronotum; Colombia barbatus 



IX and X of variable width but never in the form of thin disks 12 



12. Palpal sulcus entire; 2.5 mm.; Venezuela auricapillus 



Palpal sulcus not entire 13 



13. XI not as long as four preceding united 14 



XI as long or longer than four preceding united 15 



14. XI short, thick, sides subparallel, rounded at apex; 2.2 mm.; 



Venezuela and Colombia robustus 



XI very narrow at base, nearly globular; 2.25 mm.; Venezuela.. 

 in flatus 



15. Pronotum slightly longer than wide 16 



Pronotum distinctly wider than long sandersoni new species 



16. XI as long as four preceding united; 2.1 mm.; Colombia. . . .bulbifer 

 XI as long as five preceding united; 2.1 mm.; Colombia, .transversalis 



Key to Species of Group V 



Palpal sulcus entire 2 



Palpal sulcus not entire; 2.7 mm.; Ecuador juscopilosus 



2. Antennal club not well developed, IX and X only slightly trans- 



verse, subequal, and not much wider than VIII 3 



Antennal club strong, very abruptly formed, IX at least twice as 

 wide as VIII 4 



3. Pubescence long; Brazil impunctatus 



Pubescence short; 2.4 mm.; Venezuela crassipalpus 



4. XI very large, as long as six preceding united; 1.9 mm.; Paraguay 



laetus 



XI not much longer than four preceding; 2.2 mm.; Brazil, .gracilipes 



