1910] Diplopoda from the Western States 25^ 



Eyes in adults with ocelli in two rows which run a little oblique to 

 the lateral portion of front margin of the first segment, which covers 

 several of the more caudal ocelli. Ocelli commonly about nine arranged 

 ^vith the greater number in the dorsal series, thus: 6, 3; occasionally a 

 single eye in a third^row. Eye area extending almost transversely. 



Antennae short. A little clavately thickened. The second and 

 sixth articles longest; others distinctly longer than broad. Proximal 

 articles sparsely provided with hairs of moderate length, especially 

 toward the distal ends, the distal articles more densely clothed. 



Gnathochilarium conspicuously broader distally than proximally. 

 Lingual lamellae completely separated by the long, triangular promen- 

 tum. Laminae strongly narrowed proximally, 2.75 times as long as the 

 greatest width. Mentum toward proximal border with a sharply out- 

 lined semi-circular impression which has its concavity distad; wider at 

 base than the median length in the ratio 11 :9. Stipites nearly 3.5 times 

 as long as the greatest width, the processes being included. In one 

 specimen the processes of stipes were apparently completely fused togeth- 

 er as shown in PI. XLIII, fig. 4. 



First segment nearly as long dorsally a-s the second and third taken 

 together. Extending over the caudal portion of head. Posterior mar- 

 gin straight. Lateral margins widely rounded from caudo-lateral angles 

 cephalo-mesad. The cephalic margin substraight mesally. Within 

 each lateral margin several longitudinal striae extend cephalad from 

 the caudal margin a mostly short distance. 



Second segment with deep striae below, the striae on subsequent 

 segments extending farther dorsad, on all but the most anterior and the 

 most posterior reaching the lateral carina which is borne on all but the 

 first segments. Spiracles beginning on the fifth segment. Dorsum of 

 segments from the fourth to the antepenult (not inclusive) each with 

 six strongly developed carinae, of which the lowermost on each side is 

 conspicuously thickened. A weak, fine median keel along dorsum. 



Anal scutum large, smooth, caudally rounded. 



Anal valves exceeding the anal plate, the free margin thickened. 



Legs without true hairs; but armed with definitely arranged spines 

 or spinescent bristles. Claws very large, each armed with a well- 

 developed spine springing from its base on the ventral side. 



In the male the first two pairs of legs are reduced, but otherwise 

 unmodified, having six articles and being normally armed. 



Gonopods of male concealed excepting for the distal end of slender 

 curved process which projects caudad on each side from beneath a 

 covering plate. 



Number of segments 47-49. 



Length 19 mm. Width 1.4 mm. 



Locality — Southern California. 



