chamberlin: myriopoda of the Australian region. 211 



Anal valves much exceeding the tergite, somewhat angulate above, mesally 

 compressed. 



Number of segments, sixty-three. 



Length (female type), near 70 mm.; width, 6 mm. 



598. DiNEMATOCRICUS IMPRESSIOR, Sp. IIOV. 



Type.— M. C. Z. 4,139. Solomons: Pawa, Ngi (W. M. Mann). 



Agreeing closely with D.fratrcUus in coloration, proportions, number 

 of somites, and form and distribution of scobina. It differs obviously 

 in the impressions on the somites. The segmental stiture is more 

 deeply impressed, especially above; opposite the pore it is more widely 

 and less strongly curved, the curve in D.fratrcUus embracing the pore 

 more closely above and extending farther cephalad before continuing 

 in the straight dorsal part. Pore larger. The most readily noticeable 

 difference is the presence on the prozonite dorsally of strong, somewhat 

 sinuous transverse striae which bifurcate and unite sparsely and of 

 w^hich the most caudal, taking its origin just above anterior edge 

 of pore, is typically deep and complete or sometimes interrupted, 

 forming the so-called second suture. 



Number of segments, forty-eight. 



Length, about 46 mm. ; width, 5.5 mm. 



599. DiNEMATOCRICUS RUBRIORIPES, sp. nOV. 



Type.— M. C. Z. 4,941. Solomons: ^Yai-ai (W. M. Mann). 



This species also belongs in the D.fratrellvs group which appears also 

 to include biincisus (Pocock). It differs from D. fratrellus and 

 imjyrcssior in having the legs ferruginous instead of brown. It differs 

 from those species also in the course of the segmental suture which 

 remains essentially straight or even bows a little in toward the pore 

 instead of presenting a strong curve away from the pore; thus the 

 pore lies wholly in front of the suture instead of being in line with its 

 dorsal and ventral parts. Lacking the secondary suture character- 

 istic of D. iiiiprcssior. 



The type has forty-six somites as against forty-eight in the two 

 preceding species. 



Length of type, about 43 mm. ; width, 5 mm. 



600. DiNEMATOCRICUS MALAITAE, sp. nOV. 



Type.— M. C. Z. 4,952. Solomons: Malaita, interior (W. M. 

 Mann). 



