Mr. A. G. Butler on neio Spirostrepti. 329 



gins ; fifty-three segments in all ; legs rather long, the second 

 and third joints long and compressed. 



Total length 114 millim., or about 4| inches; width of 

 nuchal plate 9 millim., at centre of body 11 millim., of pre- 

 anal segment 7 millim. 



Evidently quite a common species in the Betsileo country. 



2. Spirostreptus trachydermuSj sp. n. 



Black, with the clypeus reddish, the antennte and legs 

 bright ochre-yellow. 



Body very long, dull, distinctly attenuated in front, but 

 very slightly so behind ; head rather small, smooth, elongated, 

 almost quadrate when viewed in front ; clypeus bilobed, the 

 lobes being anguhxted, divided in front by a broad conical 

 excision. Antennfe with rather long joints, the second and 

 third joints especially, the second nearly half as long again as 

 the third ; smooth, scarcely setose, cylindrical, the joints at- 

 tenuated behind, the sixth pyriform, the seventh a very small 

 button ; ocular plates forming an oblique semiellipticai patch, 

 the anterior edge of which is occupied by eleven facets, wliilst 

 the series, counted from the inner margin, consist of eight 

 facets from the first to the fourth series ; nuchal plate with 

 two deep indentations at the sides in front, followed by two 

 shorter indentations, again succeeded by a fifth, which runs 

 obliquely from the posterior to the anterior margin ; the 

 dorsal surface in front is deeply reticulated, the indented 

 markings becoming wider towards the middle, and changing 

 at the back into short longitudinal stria? ; the dorsal segments 

 are smootli in front, and show under a high power a series of 

 extremely fine embossed transverse lines ; the posterior por- 

 tion of the front half of the segments is finely granulose, and 

 divided from the posterior half of the segments by a deep 

 sulcus ; posterior portion tumid, rugose, and crossed longitu- 

 dinally by numerous dccj) longitudinal indentations ; preanal 

 segment coarsely reticulate, very narrow, very distinctly 

 convex along its lateral posterior margins, and terminating 

 dorsally in an obtuse point ; preanal plate very coarsely 

 gi'anuiose, broad, triangular ; anal plates coarsely granulose 

 reticulate, compressed behind ; fifty-four segments in all ; legs 

 long and fiattened. 



Total length 153 millim., or about 6 inches; width of 

 nuchal plate 9 millim., at centre of body 11 millim., of pre- 

 anal segment 8 millim. 



Apparently about equally common with the preceding 

 species. 



