CHAMBERLIN: THE CHILOPODA OF BRAZIL. 199 
First maxillae of usual structure; outer branch robust, without 
lappets. 
Claw of palpus of second maxillae long, distally slender and acute 
and strongly curved; pectinate along both edges, the divisions long 
and slender. 
Antennae moderately long, being three and a fifth times as long as 
the cephalic plate, only a little attenuated distad. Articles of prox 
mal portion moderately long, each somewhat clavately widening from 
proximal and distad; the five articles preceding the ultimate short. 
and relatively wider. Hairs of the last six or seven articles very short 
and rather numerous, on the more proximal articles becoming much 
more sparse and manifestly longer. 
Prebasal plate exposed. 
Basal plate trapeziform, the sides convex. About one third as long 
as the cephalic plate and 2.4—2.5 times wider than long. 
Claws of the prehensors when closed not fully attaining the front 
margin of the head. Claws smooth. All articles unarmed within as 
usual. 
Prosternum with sides for most of length nearly straight, a little 
converging caudad, more abruptly rounding mesad at posterior 
corners. Anterior margin well chitinized; but not at all denticulate; 
mesal incision between lateral portions shallow, semicircular; sloping 
from each side to the middle, there forming an obtuse reentrant angle. 
Prosternum much wider than long, the ratio being about 25: 18; longer 
than the outer length of femur in about ratio 3:2. Hairs of pre- 
hensors sparse and in part moderately long; those of prosternum very 
sparse and short. (Plate 4, fig. 2). 
Prescuta of the anterior and of the posterior fourths of length short, 
the others being moderately long. Sulci sharply impressed. 
Spiracles all circular; the first conspicuously larger than the second, 
the others decreasing in size caudad and becoming very small or 
minute in the posterior region. 
The more anterior sternites with a rather narrow angular median 
caudal process which fits into a corresponding excavation in the 
succeeding sternite. Each with a subcruciform impression which is 
considerably expanded in the region where the furrows cross. Pores 
beginning on the second segment where there are from forty to forty- 
five in the type; pores present on all succeeding sternites excepting 
the last, those of the penult segment being fewer in number; pores 
arranged in an undivided circular area. 
Last ventral plate wide, trapeziform, the sides being nearly straight 
