40 NEOTROPICAL PSELAPHIDAE 



6. Sides of the head with the ventro-lateral borders sharply defined or 



carinated; ventral surface of the head with a long, median, longi- 

 tudinal carina which bifurcates anteriorly ARCTOPHYSIS 



Sides of the head with the ventro-lateral borders smoothly or evenly 

 rounded both anteriorly and posteriorly of the eyes, or in some 

 genera {Sebaga) carinated between the eyes and the mentum but 

 evenly rounded posteriorly, behind the eyes ; ventral surface of the 

 head with converging carinae which begin near the outer anterior 

 angle of the mentum and unite from a point near the posterior 

 limits of the eyes to the neck, and consequently these carinae form 

 a conspicuous V or Y pattern 7 



7. Head anteriorly truncate, with the antennae distant from each other 



at their bases 8 



Head subacutely narrowed or attenuated anteriorly, with the antennae 

 very close to each other at their bases, subcontiguous JUBUS 



8. Fronto-antennal tubercle widely, deeply excavated or longitudinally 



sulcate medianly JUBOMORPHUS 



Fronto-antennal tubercle not medianly, longitudinally sulcate or 

 excavated SEBAGA 



9. Ventral surface of the head with three longitudinal sulci, these consist 



of an oblique lateral groove on each side, and a median groove; disc 

 of pronotum with a strong median longitudinal sulcus. . .BALEGA 



Ventral surface of head with only a single median sulcus, or a median 

 fovea; pronotal disc with or without lateral longitudinal sulci, but 



lacking a median longitudinal sulcus 10 



10. Ventral surface of head with a median longitudinal sulcus; the 

 pubescence thick and abundant but not downy ; tarsi with two very 

 unequal claws ; sides of pronotum with three lobes, two lateral and 

 a basal lobe being more or less developed STRATUS 



Ventral surface of head with an antebasal, large fovea placed medianly 

 and near the mentum; pubescence peculiar, being long, abundant, 

 soft and downy, that is appearing like the nap of a cloth ; sides of 

 pronotum constricted; tarsi with two equal claws. . . .PHAMISUS 



PSELAPHOMORPHUS (Motschulsky, 1855) 



brevipennis Raffray. 1917. Paraguay. 



bruchi Raffray. 1909. Buenos Aires, Argentina, con Solenopsis rich- 



teri Forel. cf. Bruch, 1929. 

 longiceps Raffray. 1890. Brazil. 



microphthalmus Raffray. 1890. Venezuela, {muticus Raffray) 

 sculpturatus Motschulsky. 1855. Panama. Genotype. 



MACTA (Raffray, 1890) 

 constricta Raffray. 1890. Brazil. Genotype. 



