ZOOLOGY. ARTHROPODA. 163 



Diag. Related to Spirobolus flavocmctus, Karsch., but the 

 segments very distinctly segmented ; anterior part not striate ; 

 antennae and legs reddish-brown. 



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

 terior margin of segments rufous; antenna and legs reddish- 

 brown. Slender, anterior segments scarcely attenuated. Ver- 

 tex smooth, sulcus shallow; clypeus only moderately emargin- 

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

 cal. Antennee rather 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 strire, beneath with 

 short and straight strise ; median part with a transverse sulcus 

 which ends above repugnatorial pore; posterior above with 

 a few stria?, beneath almost smooth or with a few weak oblique 

 strise. 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 obtusely angled. Repugnatorial pore 

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

 extending slightly beyond sides of body. Male: slenderer 

 than female; coxa? of 3d, 4th, and 5th 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 thick, 

 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. 



