CHAMBERLIN: THE CHILOPODA OF BRAZIL. 189 



in Brazil, fide Meinert; but a reference to the paper cited fails to 

 reveal any record of the species from the country by the latter author 

 and the species is accordingly here omitted. The names falling as 

 synonyms in this genus are very numerous. The known Brazilian 

 species may be separated by means of the following key. 



Key to Species. 



First dorsal plate with a deeply impressed transverse cervical 

 sulcus which may be nearly covered by the head, 

 b. Prefemur of the twentieth legs (as also sometimes of some of 

 the immediately preceding pairs) armed on dorsal side at 

 distal end one to several spines; prosternum with a fine sul- 

 cus across anterior portion. 



c. Dorsal plates from the sixth or seventh caudad distinctly 

 margined laterally. 



d. At least eight or ten basal articles of the antennae 

 glabrous, the others finely pubescent, the hairs not 

 in rows; coxopleural process with nine spines or 



points S. (jigantea Linne. 



dd. Only four or five basal articles of antennae glabrous; 

 hairs of the others often in streaks or rows; points 

 of the coxopleural process fewer. 



e. Ventral plates without longitudinal sulci ; margina- 

 tion of dorsal plates beginning at seventh segment; 

 femur of twentieth and also of nineteenth legs with 

 one or two spines at distal end above. 



S. angulata Newport, 

 ee. Ventral plates of second to twentieth segments 

 with two deep longitudinal sulci crossing the entire 

 length of plate; margination of dorsal plates be- 

 ginning with the fifth; femur of twentieth legs 

 lacking spine at distal end above. 



S. viridicornis Newport, 

 cc. Margination of dorsal plates beginning only with the 

 eleventh to fourteenth segment. 



Four basal articles of antennae glabrous, the others 

 densely pubescent; none of dorsal plates with sulci 

 passing across entire length; claw of anal legs with 

 two minute basal spines S. explorans, sp. nov. 



