chamberlin: geophiloidea of the southeastern states. 431 



Anal legs with five joints distad of coxopleura (a single porigerous 

 pit on each coxopleura.) Timpina, gen. nov. 



Anal legs with six joints distad of coxopleura; two porigerous 

 pits on each coxopleura. Sogona, gen. nov. 



Sogona, gen. nov. 



Head rather small. Frontal plate not discrete. Prebasal plate 

 (in type) present. Basal plate wide. Antennae flattened, broad at 

 base and conspicuously attenuated distad. Dorsal plates bisulcate. 



Mesial portion of labrum with free margin a little convex, bearing 

 a fringe of long teeth. 



Both branches of first maxillae distinctly separated, the biarticulate 

 outer one bearing membranous lappets, in dorsolateral position. 



Claw of palps of second maxillae large, simple; sterna completely 

 fused. 



Prehensorial feet rather large, partly exposed from above; chitinous 

 lines strongly developed. 



Ventral pores in a narrow transverse band immediately behind 

 middle of anterior ventral plates. 



Last ventral plate wide. Coxopleural pores opening into two large 

 pits on each side, which are covered by the ventral plate. 



Anal legs with six joints, clawless. 



Type. — Sogona minima, sp. nov. 



Sogona minima, sp. nov. 



Slender, attenuated cephalad and caudad; body with scattered 

 short hairs, those on legs more numerous but still sparse. 



Yellow: head with presternum and prehensorial feet reddish brown. 



Anterior margin of head with lateral margins straight and some- 

 what oblique, meeting at mesial line in an obtuse angle; sides of head 

 weakly excurved from end to end. Head with but few scattered hairs. 

 Almost exactly equal in length and breadth or a trifle longer than wide; 

 three times as wide as the median length of basal plate. Prebasal 

 plate exposed. Basal plate more than three times wider than the 

 median length. 



Antennae moderate or short, the articles decreasing in length 

 distad to the penult; flattened or compressed, attenuated from base 

 distad; ultimate article longer than the two preceding taken together 



