446 On new Species of Myi'iopoda from Rodriguez. 



neous ; fifty-nine dorsal segments ; lateral wings of first seg- 

 ment quadrisulcate in front ; remaining segments swollen 

 behind, laterally striated ; preanal segment deeply bisinuated 

 behind. Length 4 inches 3 lines, width 7 millims. 

 (Coll. by Gulliver.) 



EURYLITHOBIUS, n. gen. 



Lithobio aiRnis, multo latior, segmentis viginti ; antennarum articulis 

 septendecim, quorum decern primoribus et postremo distinctis, 

 aliis inconspicuis ; oculis utrobique quatuor ; pedum paribus uno 

 et viginti, latis, breviusculis. 



Gen. typ. E. Slatert. 



Eurylithohius Slaterij n. sp. 



Fawn-coloured, legs and ventral surface testaceous ; dorsal 

 segments gradually narrowing towards each extremity, with 

 two longitudinal depressed lines and a lateral marginal ridge ; 

 terminal segment subcorneal behind. Length of body 1 inch, 

 including hind legs 1 inch 8 lines ; width in the centre 4| lines. 



(Coll. by Slater.) 



Genus Ehombocephalus. 

 Rhomhocephalus smaragdinus^ n. sp. 



Anterior half of body emerald-green, posterior half oHve- 

 green ; segmental incisions deeper-coloured ; legs pale greenish, 

 in twenty pairs ; posterior pair without denticles ; preanal plate 

 oblong. Length of the body 10| lines. 



(Coil, by Slater.) 



Genus Mecistocephalus. 

 Mecistocepkalus Gidliveri^ n. sp. 



Amber-coloured, legs paler ; head reddish castaneous ; for- 

 ceps of mandibles black, the latter with about four teeth ; head 

 below deeply excavated ; dorsal segments with a deep longi- 

 tudinal sulcus; forty-eight pairs of legs. Length 1 inch 1 line. 



(Coll. by Gulliver.) 



Seems allied to Geophilus insidaris of Lucas. 



