chamberlin: the chilopoda of brazil. 197 



ends of articles as usual, these also being longer than the more proxi- 

 mal ones. 



Cephalic plate widest in front of middle where it bulges convexly on 

 each side; sides of head caudad of this straight and a little converg- 

 ing to level of posterior end of first joint of prehensors (femur), then 

 abruptly more strongly con^•erging to the caudal corners which are 

 not rounded; caudal margin straight; anteriorly the head is convexly 

 widely rounded. Longer than wide, the ratio being nearly 43:38. 



Antennae short being only 1.9— times longer than the cephalic plate; 

 scarcely attenuated. Hairs very short, denser on the more distal 

 articles, with hairs longer and more sparse on the proximal ones. 

 Articles short, decreasing distad, with the sides more nearly straight 

 than in perditus; ultimate article not much differing in length from the 

 two preceding taken together. 



Prebasal plate exposed. 



Basal plate conspicuously narrowed cephalad; trapeziform. Two 

 and a third times wider than long. Slightly more than one third as 

 long as the cephalic plate (ratio 1:2.8-2.9). 



Claws of prehensorial feet when closed attaining the front margin 

 of the cephalic plate. Joints all unarmed within as usual. Sides of 

 prosternum for most of length nearly straight and but slightly converg- 

 ing caudad, more abruptly rounding into caudal corners. Much wider 

 than long, the ratio being 47:34. Longer than the first joint of pre- 

 hensors in ratio 3:2. 



Dorsal plates mostly showing a fine median sulcus in addition to the 

 lateral ones. Anterior prescuta short, those of the middle and pos- 

 terior regions becoming rather long, the last few then again short. 



Spiracles all circular; the first considerably larger than the second, 

 the others decreasing caudad and those of the posterior region very 

 small or minute. 



First fourteen or fifteen sternites angularly produced at middle of 

 caudal margin, the process small; process fitting into an excavation 

 in the succeeding segment as usual. The anterior margin of the 

 second sternite conspicuously extended from sides to middle, that of 

 the third segment similarly but less strongly produced, that of the 

 fourth merely convexly bowed out, and those of the succeeding ones 

 straight, or nearly so, or even a little incurved. Ventral pores present 

 on all sternites excepting the first and the last; pore area subcircular, 

 with the pores numerous. Sternites mostly showing a longitudinal 

 median furrow wliich is deepest just in front of the middle, and a 

 weaker transverse furrow which curves across in front of the pore area. 



