56 bulletin: museum of comparative zoology. 



Femuroid with tooth round, low, nodular, that of trochanter division obscure ; 

 tooth of claw as usual. 



Anterior spiracles large, vertically elliptic, the first larger than the second 

 though not greatly so; others gradually decreasing in going caudad and soon 

 becoming circular. 



Last ventral plate broader than in other species; sides convex, converging. 

 Caudal border densely clothed with fine short hairs; caudal margin straight. 

 Coxopleural pores completely covered, well removed mesad from edge of 

 plate, opening into two pits on each side. No anal pores. 



Pairs of legs, sixty-five. 



Length, 48 mm. 



The species is like P. darrana, sp. nov. and P. repanda Attems in 

 lacking pores on the first ventral plate. Those of the second plate in 

 a circular area not much smaller than that of the third. 



13L POLYGONAREA DERRANA, sp. nOV. 



Type.— M. C. Z. 2,068. Queensland: Dana, near Brisbane (W. 

 M. Wheeler). 



Fulvous, darker above; head and prehensors chestnut. 



Last article of antennae about equal to the two preceding taken together. 



CephaUc plate 1.47 times longer than wide. Plate sUghtly constricted in 

 front of position of frontal suture, the latter, however, being absent; anterior 

 margin mesally weakly indented; all corners oblique; caudal margin straight. 



No prebasal plate. Exposed portion of basal plate short, 3.7 times wider 

 than long. 



Claws of prehensors when closed reaching to distal end of second antennal 

 article. 



Presternum long, sides parallel; chitinous hues incomplete anteriorly; 

 anterior margin armed with two well separated, distally rounded teeth. 

 Femuroid of prehensors bearing a low rounded tubercle at distal end; tro- 

 chanter or basal division with an obsolete nodular tooth; intermediate joints 

 unarmed; claw with a dark conical tooth. 



Coxa of each second maxilla at mesodistal angle with the usual long acute 

 process, the joints of palpus without processes. 



Ventral pores in the usual circular area on anterior plates, the form in 

 posterior ones more transverse and tending to divide. Pores on the second 

 sternite forming a distinct circular area but this much smaller than that of the 

 succeeding sternite. 



First legs much shorter than the second, the latter equal to the third. 



Spu'acles all circular, the first much larger than the second, the others de- 

 creasing gradually caudad. 



