ZOOLOGY. AUTHIIOPODA. 163 



Diag. — Related to Spiroholus flavodndus, Karsch., but the 

 segments very distinctly segmented ; anterior part not striate ; 

 antennte and legs reddish-brown. 



Type. — Museum Acad. Nat. Sci. Phil. Greenish-black, pos- 

 terior margin of segments rufous; antennae and legs reddish- 

 brown. Slender, anterior segments scarcely attenuated. Ver- 

 tex smooth, sulcus shallow ; clypeus only moderately emargin- 

 ate^ foveolse 2 + 2, distant ; sulcus sub-continuous with verti- 

 cal. Antennae ratiier slender, reaching second segment' in 

 both sexes. Ocelli arranged in a suboval or subtriangular 

 patch, 45-55, in seven or eight series. Segments not smooth ; 

 posterior parts above with short and wavy striae, beneath with 

 short and straight strife ; median part with a transverse sulcus 

 which ends above repugnatorial pore; posterior above with 

 a few striae, beneath almost smooth or with a few weak oblique 

 striae. Lateral lobes of first segment rounded, a weak mar- 

 ginal sulcus. Anal segment with a flat, thick mucro, which 

 passes beyond valves; anal valves weakly margined, not 

 punctate; anal scale obtusety angled. Repugnatorial pore 

 placed on anterior division, small and rather deeply set. Legs 

 extending slightly beyond sides of body. Male: . slenderer 

 than female; coxae of 3d, 4th, and oth pairs of legs produced 

 into short lobes ; tibia and first two tarsal joints beneath with 

 an oval roughened lobe ; joints of anterior legs short and tbick, 

 third and fourth pairs of legs strongest ; tarsi without a pad ; 

 ventral plate of copulation- foot triangular, as high as foot, its 

 base not concave, its posterior surface ridged, thus making the 

 plate of a triangular-pyramidal form ; anterior part of first 

 foot not as high as ventral plate, triangularly pointed, the ven- 

 tral plate ridge separating them ; posterior part of anterior 

 foot as high as ventral plate, its apex with a short blunt lobe 

 on its posterior surface; posterior copulation-foot bifid, pro- 

 jecting out of the opening, the upper branches flattened and 

 fan-shaped at the end, which is convex ; lower branch elongate- 

 lanceolate, its upper edge serrate ; basal part of foot rectangular 

 and white, while the upper part is yellowish. 



