chamberlin: myriopoda of the Australian region. 35 



TuoBA, gen. nov. 



Labrum of one piece, bowed convexly as in Gonibregmatus but the teeth 

 coarser and shorter, some of the median ones darker and more strongly chi- 

 tinoiis than the others. First maxillae with outer branch or palpus distinct 

 and well developed, biarticulate, with no lappets; coxae fused; inner branches 

 of good size, not set off by suture. Coxae of second maxillae united, claws 

 smooth. Antennae filiform. Prosternum with chitinous lines; claws short, not 

 extending beyond anterior margin of head. No frontal suture. Prebasal 

 plate not exposed. Dorsal plates bisulcate. No suprascutella. Last ven- 

 tral plate wide. Coxopleural pores small, of moderate number. Anal 

 legs composed of six joints beyond coxopleurae, armed with a claw. 



Genotype. — T. curticeps, sp. nov. 



88. TuoBA curticeps, sp. nov. 



Type.— M. C. Z. 2,166. Paratype.— M. C. Z. 2,167. Solomons: 

 Pamua, Wainoni Bay (W. M. Mann). 



Color yellowish to Ught ferruginous. 



Cephalic plate short, as wide as long, sides only weakly curved; slightly 

 narrower caudally than anteriorly; anterior margin very obtusely angular, 

 each side straight; caudal margin more shghtly angulate at middle. 



Teeth of labrum coarser and correspondingly fewer than in other gonibreg- 

 matids; five teeth of median region dark, more strongly chitinized than the 

 lateral ones. 



Basal plate relatively short, posteriorly much exceeding the cephalic plate 

 in width. 



Chitinous fines of prosternum fine. 



Claws of prehensors when closed nearly on a level with anterior margin of 

 head. Each claw armed at base with a minute denticle, the other joints and 

 the prosternum unarmed. 



Spiracles all circular, small, the first larger than the second and the latter 

 a little larger than the third. 



Dorsal plates deeply bisulcate. 



Ventral plates with a median longitudinal impression. Ventral pores in a 

 band across caudal border. Last ventral plate very wide, strongly narrowed 

 caudad, the caudal margin straight. 



Anal legs of male moderately crassate proximally but tarsal joints slender. 



Pairs of legs, in male forty-seven, in female forty-nine. 



Length, 21 mm. 



