46 bulletin: museum of compakative zoology. 



General color deep ferruginous, the head and prehensors darker, more 

 chestnut. 



Body broad anteriorly, strongly narrowed caudad. 



Cephahc plate much longer than wide (14: 9), widest anteriorly and strongly 

 narrowed caudad as in Mecistocephalus; frontal suture weakly indicated. 

 Cephahc plate overlapping the basal plate. 



Basal plate trapeziform; exposed portion three times wider than the median 

 length. 



Claws of prehensors when closed reaching to about the middle of the second 

 antennal article; outer height of femuroid more than half the length of the 

 prosternum (7: 12); claw armed at base with a long, stout tooth, the second 

 and third articles with paler nodular teeth, and the first article with a short 

 stout tooth proximad of distal end and a smaller dark nodule between this and 

 the proximal end. 



Prosternum armed in front with two stout, plate-like,- teeth; wider than long 

 (cir. 31:29). 



Spiracles all circular, the first much the largest, the second somewhat 

 intermediate, the others decreasing very gradually caudad. 



Ventral plates with a median longitudinal sulcus beginning with the second. 



No ventral pores detected. 



First legs shorter and much more slender than the second. 



Last ventral plate narrow, longer than wide, {dr. 13: 11), narrowed caudad, 

 the caudal end rounded. 



Coxopleurae bearing ventrally on each side about fifteen pores. 



First two articles of anal legs beyond coxopleurae bearing on ectal surface 

 numerous short setose points densely arranged. 



Anal pores distinct. 



Pairs of legs, thirty-nine. 



Length, 30 mm. 



107. Pachymeroides alter, sp. nov. 



Type.— M. C. Z. 1,89L Tasmania: Wedge Bay (G. H. Hardy). 



In general appearance very similar to the preceding species though lighter 

 yellow in color excepting the head and prehensors with prosternum which 

 are dilute chestnut. 



At once distinguishable from the other species in the different form of the 

 cephalic plate which is not conspicuously narrowed from the anterior end 

 caudad; its sides are parallel from the rounded anterior corners caudad to 

 near the caudal third, from where they converge to the rounded posterior 

 corners. 



The basal plate obviously less exposed than in P. mimeticus, the exposed 

 area being four and a half times wider than long. The prehensors are very 



