chamberlin: myriopoda of the Australian region. 223 



Prozonites black, the metazonites red; anal segment black; collum and 

 head dusky, the head with small lighter areolations on each side mesad of eye 

 and antenna and across the vertex. Antennae and legs yellow. 



Antennae short and thick. Eyes subrotund with mesal side considerably 

 flattened; separated by about twice their diameter. Setigerous foveolae 

 2 + 2. 



Collum strongly narrowed down the side as usual, both the anterior and the 

 posterior margin of the narrow part a little concave; the lower end well 

 rounded. Margined from lower end up to level of eye in front. 



The transverse suture on segments very distinct throughout, bowed scmi- 

 circularly about the pore. Each segment strongly constricted just in front of 

 the pore, the metazonite rising conspicuously above the depressed caudal 

 portion of the prozonite. Metazonite smooth, but the prozonite marked with 

 deep longitudinal sulci both across dorsum, and down the sides and beneath. 



Anal scutum rounded caudally; equalhng the valves. 



Median plate of the gonopods; very small, with the anterior process espe- 

 cially small and triangular; much exceeded by the widely diverging proximal 

 arms which he against the cephalomesal side of the anterior gonopods proper. 



Number of segments, forty-five. 



Diameter (male), 2.5 mm. 



640. Trigoniulus barbouri, sp. nov. 



Type.— M. C. Z. 4,775. Dutch New Guinea. Manokwari 

 (Thomas Barbour). 



Antennae short and thick. Eyes widely separated, subtriangular but with 

 the sides convex and the angles more or less rounded. 



Collum in form and relations as in T. lumbricinus. 



The transverse suture of segments itself indistinct but its position clearly 

 defined by a series of puncta. The metazonite rather strongly elevated 

 above the prozonite. Both divisions of segment smooth, thus differing very 

 obviously in appearance from T. lumbricinus. 



Anal scutum a little exceeding the valves. 



Number of segments, forty-seven. 



Length (male), near 37 mm.; width, 3.5 mm. 



In coloration somewhat similar to T. lumbricinus (Gerstaecker), 

 but the antennae and legs are fulvous. The distal part of the anal 

 scutum and the collum dusky. 



It is most readily to be distinguished by the structure of the male 

 gonopods, the median plate of which is decidedly smaller and espe- 

 cially narrower than in T. lumhricinvs with the two proximal angles 

 extending caudad as arms subparallel with each other, much less 



