Occasional Papers of ilie Museum of Zoology 21 



Median arc of labrum composed of about sixteen stout teeth 

 of which those toward the ends of the series have the tips more 

 acute and curved mesad, in transition to the more finely tipped 

 lateral teeth of which there are in the type four on each side, making 

 a total of twenty-four teeth (Plate IV, Fig. 18). 



Branches of first maxillae distinct, set off by suture; both dis- 

 tally membranous and pointed, the outer branch more obtusely so. 



In the second maxillae the suture between pleurite and coxo- 

 sternum is of the typical form. Claws of palpi completely pectinate 

 as usual. 



Basal plate trapeziform, its anterior margin overlapped by the 

 head, the prebasal plate thus not evident. Anterior margin of 

 prosternum unarmed. Claws of prehensors stout, when closed 

 about on a level with anterior margin of head. Femuroid of 

 prehensors with inner side very short, it and other joints unarmed. 



Tergites strongly bisulcate, the sulci deep and broad from the 

 first plate. Last tergite very broad, wider than long nearly in 

 ratio 5:3; sides moderately converging caudad; caudal margin 

 widely convex with a short median portion truncate. 



Ventral pores present in a subcircular area on all sternites 

 from the second to the penult inclusive. 



Last ventral plate trapeziform, short and broad, wider than 

 long in ratio 5:3; each lateral margin slightly incurved or, rather, 

 forming a very obtuse re-entrant angle; caudal margin wide and 

 straight (Plate IV, Fig. 19). 



Last legs consisting of seven articles. Coxae each with two 

 large simple glands of which the anterior is completely covered 

 and the posterior one covered excepting a small ectal portion. 

 In the male the femur is thick and each succeeding joint is pro- 

 gressively less in diameter, the last one slender (Plate IV, Fig. 19). 



Pairs of legs in male type, fifty-nine. 



Length, 32 mm. 



