520 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
straight; very slightly wider just in front of caudal corners than 
anteriorly; sides straight between rounded anterior and_ posterior 
corners. Frontal suture not evident. Plate 1.6-+ times longer than 
wide. Basal plate considerably overlapped the exposed portion in 
type being five times wider than long, but the shortness may have 
been caused in part by shrinkage of full dorsal plate over the basal 
in the alcohol; but measuring entire length of plate caudad of head 
gives a ratio of width to length of 4:1. 
Antennae robust, short, only 2+ times longer than the head. 
Articles moderate; the ultimate only three fifths as long as the two 
preceding ones taken together. 
Claws of prehensors when closed extending to distal end of the 
second antennal article. Claw armed at base with the usual stout, 
subconical, distally rounded black tooth. Tooth near distal end of 
femuroid of about same size and form as that of claw; femuroid 
broadly bulging between tooth and proximal end. 
Anterior margin of the prosternum bearing the usual two teeth; 
these distally well rounded and somewhat nodular, not so close to- 
gether as in the preceding species, the distance between them nearly 
equalling that between each one and base of corresponding femuroid. 
Sides straight, only very slightly converging from anterior end to 
caudal corners. Exposed portion nearly of same length as breadth, 
total length of median portion 4 a all is measured being greater 
than the width. 
Anterior prescuta very short, fie: prescuta becoming of moderate 
length in caudal region. 
Anterior spiracles very large, vertically subovate, gradually de- 
creasing in size caudad and becoming circular, those of the caudal 
region very small. 
Anterior sternites with the median longitudinal sulcus deeply 
impressed, crossed at or a little behind middle by a wider transverse 
sulcus, the impression deepest at place of crossing, sulci weaker on 
caudal plates. 
Last ventral plate very narrow and long, sides incurved, more 
strongly converging than in cubae; caudal corners obliquely truncate; 
caudal margin straight; anterior margin strongly convex. Anterior | 
portion of plate densely clothed with fine very short hairs which are 
more sparse on other parts of plate. 
Coxopleurae large, elongate as usual. Densely finely porose. 
Densely clothed between pores with fine and very short hairs. 
Last dorsal plate proportionately narrow and long; twice as long 
as its greatest width; almost as wide caudad as cephalad; sides a 
little incurved between ends; caudal corners oblique; caudal margin 
weakly incurved. 
Anal legs greatly exceeding the penult in length. Slender, the 
