MYRIAPODA 59 



The yellow areas of the carinac are narrower than in H. curtipes, 

 especially in the middle and front of the segment ; the dark color of 

 the posterior margin is also more distinct than in that species. 



HYBAPHE CURTIPES sp. nov. 



Type. No. 790, U. S. Nat. Mus. Collected at Pullman, Washing- 

 ton, by C. V. Piper. 



Length of male about 33 mm. ; "width 5 mm. ; length of leg with- 

 out claw 4.4 mm. ; with claw 4.6 mm. ; length of female about 36 

 mm. ; width 5.7 mm. ; length of leg of female 5 mm. ; claw .3 mm. 



Color in alcohol grayish or greenish-brown, more or less marbled ; 

 carinae yellow, the yellow area larger and apparently brighter colored 

 than in H. tersa. 



The small and weak legs of the male of this species are, perhaps, 

 the most conspicuous difference between it and H. tersa. Additional 

 diagnostic features are to be found in the small size of the body, the 

 more convex dorsum, the narrower and more rounded carinaa, with a 

 larger yellow area. The reduction of the carinaa becomes particularly 

 noticeable on the posterior segments, only a few of which have the 

 corners produced, and that but slightly, in comparison with the large 

 projecting angles of H. tersa. The thickened margin of the carinas, 

 on the other hand, is more pronounced in the present species, and the 

 poriferous cavity is larger ; in other \vords, the body characters which 

 separate Hybaphe tersa from Harpaphe haydeniana are accentuated in 

 Hybaphe curtipes. 



Harpaphe gen. nov. 



Type. Harpaphe haydeniana (Harger) from Oregon. 



Closely related to the two preceding genera, but of larger size and 

 more robust habit. The posterior angles of the carinae, instead of be- 

 ing rounded, are distinctly produced, and the slender, terete, posterior 

 ramus of the gonapods of Isaphe and Hybaphe is replaced in Har- 

 paphe by a very short, robust, flattened and blade-like armature, to 

 which the generic name alludes. Whether the generic is too high a 

 rank to assign to these groups of species can only be determined at a 

 considerably more advanced stage of the study of the Diplopoda of the 

 Northwest. 



HARPAPHE HAYDENIANA (Wood), 

 (pi. iv, figs. 4, 4fb, 4c.) 



Polydesmus haydenianus WOOD, Proc. Phila. Acad. Sci., p. 10, 1864 ; Trans. 



Am. Phil. Soc., xm, p. 226, 1865. 

 Leptodesmus haydenianus BOLLMAN, Bull. 46, U. S. Nat. Mus., p. 122, 1893. 



