< iiamiikuun: mykioi>oi>a OF THE AUSTRALIAN REGION, 225 



broad, broadly articulating distally with the distal division which 



extends Well beyond it. Second division broad throughout, 8 ridge 



rising at mesa) cd^r distad and becoming free as a distinct process 



much as in Syinpastroplius but with no distinctly separated rounded 



joint, ectad of the region of this process. 

 Genotype. — P. pertinent, sp. nov. 



642. PlIAGOSTROPIIUS PERTINENS, sp. riOV. 



Type.— M. C. Z. 4,921. Paratypes — M. C. Z. 4,922, 4,923. 

 Solomons: Fulakora (W. M. Mann). 



General color deep greyish brown to grey with darker posterior border to 

 somites, the annulus enclosing a little in front of margin a much deeper colored 

 narrow stripe or line behind which the border is often reddish while a lighter 

 line may precede it. Legs brown to light ferruginous. 



Sulcus of head very widely interrupted in median region. Setigerous 

 foveolae 2 + 2. Lower margin very characteristic, the two sides straight, 

 thickened and strongly chitinous, meeting in an obtuse angle in the middle 

 whence they curve dorsad a little but form no distinctly set off median sinus ; 

 median teeth fused into a single plate crossing the angle. Antennae clavate, 

 very short. 



Collum nearly attaining lower level of second tergite which is slightly con- 

 cavely excavated beneath. Lower end of collum narrowly rounded. 



Suture of segments not strong, straight opposite the pore or sometimes 

 widely curved. Caudal margin of tergites opposite pore often decidedly 

 convexly bowed with an obtuse emargination part way down side from pore 

 and sometimes one above pore. Dorsally the caudal margin also often obvi- 

 ously sinuate. On the sides segments crossed by numerous very fine, closely 

 arranged beaded striae which on prozonite tend to branch and to rise dorsad a 

 little. Above level of pore the fine surface of prozonite is densely marked 

 with small horseshoe-shaped impressions with concavity caudad; the lines 

 from some of these cross over the anterior part of metazonite; across dorsum 

 the suture indicated merely by a shallow depression. 



Anal tergite exceeded by the valves. The latter not margined or com- 

 pressed; smoothly rounded. 



Number of segments (male type), fifty-two. 



Length (male), 37 mm.; width, 2.6 mm. 



643. Phagostrophus waiainus, sp. nov. 



Type.— M. C. Z. 4,942. Paratypes.— M. C. Z. 4,943. Solomons: 

 Wai-ai (W. M. Mann). 



Very similar in general appearance to the preceding species. It 



