1910] Diplopoda from the Western States 253 



is commonly rather conspicuous. Dorsum as a whole complanate. 

 Carinae a little elevate dorsad. 



Anal plate with distal process apically decurved. 



Anal valves with the mesal edges strongly margined and elevated. 

 The usual setae present. 



Anal scale sub-triangular. 



Ventral plates with the usual cruciform impression, the transverse 

 furrow being the wider and deeper in most plates. 



Legs clothed with short stiff hairs, this rather longer and more 

 abundant on distal joints. 



Length, 10-11 mm. Width, 1.3-1.4 mm. Length of antenna ad 

 1.6 mm. 



Locality— Salt Lake City, Utah (June 23, 1900). 



FAMILY PARAIULIDAE. 



Paraiulus zakiwanus sp. nov. 



Color brownish red. The first segment clear reddish without 

 darker markings ; but most of the body subsequent to this with a row 

 of black dots along each side, one to each segment, which on the more 

 posterior segments is supplemented with an area of smoky or blackish 

 which tends to extend or diffuse about the segment and thus much to 

 darken it. No distinct median dorsal line and no light spots. Vertex 

 of the head dark, a band between the eyes darkest, black; the head else- 

 where reddish, the red intruding into lower border of the dark area in 

 three semicircular incisions. Legs brown. 



A sharply impressed furrow extending from the upper margin of the 

 eye area mesad curving evenly mesad and then bending sharply back 

 dorsad to meet its fellow at an angle on the mesal line ; the median longi- 

 tudinal line extending distinctly to this angle. A second impressed 

 line a little cephalad of the caudal margin of the head, this line being 

 bent forward at a sharp angle mesally. Head very finely rugose. 



Eyes are large, sub-triangular, the ventro-lateral side and the caudal 

 side convex, the mesal being concave. OcelH 63-65, arranged in nine 

 transverse series which, counting from above ventrad arc as follows: 

 11, 10, 9,9 (8), 7, 6,5,5 (4), 3. 



First dorsal plate with the lateral margins not angularly produced 

 beneath but nearly straight and subparallel with the axis of the body. 

 Entire border of plate distinctly margined. Finely rugose or nearly 

 smooth, not at all striate. 



Second segment with four deep striae on each side beneath and on 

 caudal division, the lowermost margining the lower edge. 



Subsequent segments also deeply striate beneath, the striae well 

 spaced apart. 



Spiracles rather small ; touching the transverse suture which is bent 

 at their level. 



In the male the sixth and seventh segments are moderately extended 

 beneath the lower margin of the latter evenly convex in outline, not at all 

 angular. 



