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 ^•ery slightly converging from anterior end to 

 caudal corners. Exposed portion nearly of same length as breadth, 

 total length of median portion when all is measured being greater 

 than the width. 



Anterior prescuta very short, the 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 cuhae; 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 wdde 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 



