216 bulletin: museum of comparative zoology. 



Cephalic plate much longer than wide (ratio about 4:29) narrowest 

 cephalad; a little constricted in front of region where frontal suture 

 would be if present, between which level and the caudal corners the 

 sides are substraight or only very slightly convex; hairs sparse and 

 mostly short or very short. Frontal plate not discrete. (Plate 6, 

 fig. 1). 



Antennae short, being only 1.9 longer than the cephalic plate; 

 attenuated. Articles mostly short, decreasing in size distad, those 

 between the fifth and the ultimate being especially short; ultimate 

 article longer than the two preceding taken together. Hairs on the 

 first four or five articles moderate in length, sparse, those of the 

 more distal articles considerably shorter and more dense. (Plate 6, 

 fig. 1). 



Basal plate trapeziform as usual ; much overlapped by the cephalic 

 plate as also by the first succeeding tergite. Exposed portion very 

 short, at the median line being but one eighth as long as the cephalic 

 plate and being about 4.5 or 4.6 times wider than long. (Plate 6, 

 fig. 1,2). 



Clypeal region without any porose area; areolae distinct and uni- 

 form excepting for a median area on the anterior portion in M'hich the 

 areolae are conspicuously reduced in size and on which four hairs are 

 borne, the clypeal region being elsewhere glabrous. 



Median piece of labrum rather large, triangular, bearing along the 

 free margin five large acute and strongly chitinized teeth; lateral 

 pieces with a fringe or more numerous slender spinescent processes. 

 (Plate 6, fig. 4). 



First maxillae bearing ectally on each side one moderately long 

 membranous lappet. Coxosternum mesally incised, but the coxae 

 well fused for most of length of contact. (Plate 6, fig. 5). 



Coxae of second maxillae almost completely separated, there being 

 only caudally a pale membranous connecting bridge. Pleurosternal 

 sutures strongly developed. Coxa not at all produced at mesodistal 

 angle. Femur and tibia bearing at distoectal angles a distinct, acute, 

 well chitinized process, that of the tibia being somewhat more dorsal 

 in position than that of the femur. Claw^ large and simple. (Plate 6, 

 fig. 6). 



Claws of the prehensor when closed extending much beyond the 

 anterior margin of the cephalic plate; attaining the distal end of the 

 second antennal article. Claw not crenulate; armed at base with a 

 stout tooth which is subtruncate distally. Intermediate articles 

 without trace of teeth, but the femur bearing on mesal side toward 



