chamberlin: the chilopoda of brazil. 169 



elevated at each ectal end than at middle where it is very slightly 

 notched; edge well chitinizcd but without true dental plates. Sub- 

 sparsely punctate. 



Cervical furrow of first dorsal plate strictly semicircular, distinctly 

 exposed excepting laterally. Two median longitudinal sulci distinct; 

 parallel excepting toward anterior ends where they diverge somewhat 

 and finally meet the transverse sulcus; not at all branched anteriorly; 

 but near caudal end each is joined by a strictly transverse sulcus 

 which extends out toward lateral margin. Plate semicircularly 

 depressed transversely in middle region near cervical sulcus (Plate 2, 

 fig. 1). Second dorsal plate with paired sulci extending entirely 

 across length; converging cephalad and near anterior end united with 

 a network of very fine anastomozing transverse lines or sulci (Plate 2, 

 fig. 1). Other dorsal plates to and including the twenty-second with 

 two distinct and subparallel longitudinal sulci across entire length. 

 The third plate with a fine but distinct straight sulcus running from 

 anterior end of each longitudinal sulcus obliquely caudoectad to the 

 lateral margin (Plate 2, fig. 1). Plates from the fifth to the twenty- 

 second inclusive with a longitudinal furrow between each longitudinal 

 submedian sulcus and the lateral margin. Last dorsal plate without 

 a median longitudinal furrow. Caudally bowed out, with the ex- 

 tended mesal portion truncate. 



Ventral plates with the usual median longitudinal furrow joining 

 the distinct transverse sulcus across the caudal portion of plate but 

 not extending across the anterior portion. Also with a distinct 

 abbreviated longitudinal sulcus on each side convergent with lateral 

 margin. Plates sparsely punctate. Last ventral plate considerably 

 narrowed caudad. Caudal margin moderately incurved at middle. 

 Wider than long in about ratio 34 : 29. 



Spiracles moderately large; mostly narrower ventrad, roundly 

 subtriangular. 



Coxopleurae of twenty-third segment with caudal processes rather 

 short, ending in a single spine-pore area extensive. 



Tarsi of anterior legs not distinctly divided. Legs clothed sparsely 

 with stiff bristles, but with no spinules. Tibiae of anterior pairs 

 armed laterally at distal end with a stout spine. Prefemur of anal 

 legs armed ventrally with a row of four stout spines which increase 

 regularly in size distad; on mesal surface with about four irregular 

 series of small bristles and with a similar series on dorsal side near 

 mesal edge and also similar series over ectal surface, also a few scat- 

 tered longer bristles present, but no true spinules present. Femur 



