CHAMBKRLIN: MYKIoPoDA of THE AUSTRALIAN REGION'. 45 



I. ■-• .\opleurae inflated, w irh numerous small pop ••low 



and laterally. 



Last lens of male stout, den-fly finely and shortly pilose beneath, abov r e 

 with sparse, longer hairs. 



Pairs ,,f legs, 6fty-£ 



Length, near 50 mm. 



Superficially this species is like Pachymerivm ferruginemn (C. Koch) 

 in having the first dorsal plate as well as the succeeding ones bisulcate 

 and in having a median longitudinal sulcus across the basal plate. It 

 is a much more robust species with obviously shorter prehensors and 

 the last ventral plate less narrowed caudad, broader across caudal 

 border. A conspicuous difference is in the labrum, the median piece 

 of which is longer and bears twelve long teeth as against only four in 

 ferruginrum and another in the first maxillae in which the outer branch 

 is undivided and lacks a lappet. 



The cephalic plate is much longer than wide (cir. 35:29). It is 

 widest behind the middle just in front of the widely obliquely rounded 

 caudal corners. Each anterior corner angularly indented or emargi- 

 nate. Caudal margin widelv concave. Xo frontal suture. 



Pachymeroides, gen. nov. 



A clypeal area present, this with distinct small polygonal areas; polygonal 

 areas elsewhere large and distinct. Labrum tripartite, all pieces discrete; 

 the lateral pieces encroaching upon the median piece laterally and in front 

 but not meeting at the middle, pectinate; median piece bearing four teeth in 

 type, at middle two stout teeth and a smaller one on each side. First maxillae 

 with coxae completely fused; inner branch not separated; outer branch 

 biarticulate. the first article with a rudimentary lappet; coxa with no lappet. 

 Second maxillae with coxae weakly united at middle with a membranous 

 isthmus, a median suture still evident; claw of palpus long and smooth. 

 Prehensorial feet large, much exposed in dorsal view, extending much beyond 

 the cephalic plate in front ; claw and femuroid armed as is also the prosternum. 

 Ventral pores not detected in type-species. Last ventral plate narrow. 

 Coxopleurae with numerous small pores beneath. Anal legs with claws. 



Genotype. — P. mimeticus, sp. nov. 



106. Pachymeroides mimeticus, sp. nov. 



Type.— M. C. Z. 1,880. Paratypes.— M. C. Z. 1,S90. Tasmania 

 (G. H. Hardy). 



