chamberlin: the chilopoda of brazil. 219 



suture strongly marked as usual; salivary pore opening through the 

 mesal border toward the anterior end in the usual way. Joints of 

 palpus all without processes; femuroid narrowed proximally; claw 

 small, simple. 



Antennae short, 1.8 times as long as head; attenuated. Articles 

 decreasing uniformly in length from the first to the penult; ultimate 

 article about equal in length to the two preceding ones taken together. 

 Hairs of proximal articles sparse, distally becoming shorter and finer 

 and more dense. 



Claws of prehensorial feet when closed reaching to or a little beyond 

 distal end of first antennal joint; stout. Claw armed at base with 

 a small, distally rounded tooth. Intermediate joints with slight, low 

 and broad, chitinous denticles. First joint toward distal end and a 

 little proximad of the corner with a thick rounded tooth. 



Anterior margin of prosternum unarmed; mesal incision very slight,^ 

 semicircular. Prosternum wider than long in ratio 64:59; 1.64 times 

 as long as outer length of prefemur; sides straight, only slightly con- 

 verging from anterior end to the rounded caudal corners. 



Basal plate trapeziform, strongly narrowed cephalad; sides slightly 

 convex caudad and slightly concave cephalad. 2.9 times as wide as 

 median length, j as long as head. Overlapped both by cephalic and 

 by first dorsal plate; the length of exposed portion to total length 

 inclusive of covered ends as 3:4. Plate as a whole about 1.85 times 

 wider than long. 



Anterior prescuta short, those of middle region becoming long 

 and exceeding half the length of the major scuta, those of caudal 

 region again short. Hairs short and sparse. 



Eight or ten of the first ventral plates with a triangular lobe on 

 caudal border fitting into an excavation in the succeeding plate. 

 Plates smooth, without pronounced furrows, or in some showing a 

 shallow median longitudinal depression. 



Spiracles large, circular, or with the anterior ones very slightly 

 longer dorsoventrally. First spiracle much exceeding the second in 

 size, the others gradually decreasing caudad. 



Legs of first pair a little more slender than the second, only slightly 

 shorter. Anterior and posterior pairs not at all or but little differing 

 in length and robustness. 



Last ventral plate narrow; sides at first but slightly converging 

 caudad, but more decidedly so toward posterior corners; caudal 

 margin subtruncate. Depressed along the median longitudinal line. 



Coxopleurae moderately inflated; ventrally pierced by about 14 



