1910] Diplopoda from the Western States 249 



In the male the first legs are, as usual, small, but the second are 

 not conspicuously reduced. The bristles on the ventral surface of the 

 distal joint of first legs more densely and sub-seriately arranged than 

 on the others. 



Copulatory appendages of the male moderately small, strongly 

 bent cephalad and parallel with the body. The main outer process 

 of each side bearing distally three chitinous appendages. The most 

 proximal of these is short and blade-like and extends dorso-mesad and 

 a little cephalad, crossing with its mate at the middle line. The sec- 

 ond takes its origin cephalad and dorsad of the first and as a long, con- 

 spicuous, flattened and somewhat twisted blade extends first cephalad 

 and then curves ventro-mesad. The third takes its origin a little dorsad 

 from the base of the second and curves first dorso-mesad and then 

 ventro-mesad, the distal portion curving finally ectad again and ending 

 in a slender acute point. From the ventral concavity of this appendage 

 springs a slender process which bears distally a stout curved seta which 

 extends caudad to end in the neighborhood of the first process. See 

 further PI. XXXVIII, figs. 2 and 3. 



Length 19-20 mm Width 2.5 to 2.7 mm. Antennae ad 2.5 to 

 2.7 mm. 



Locality — Los Angeles, Cal. (June, 1909.) 



Polydesmus amandus sp. nov. 



Segments with the main dorsal divisions whitish, a tendency for the 

 median area contiguous to the cephalic margin to be brown, the ulti- 

 mate segments and a few of the most anterior commonly more or less 

 completely brown; the prozonites clear brown. First dorsal plate clear 

 brown. Venter white, excepting a few of the most caudal and of the 

 most anterior segments which are brown. Legs white but with the 

 coxae all brown and with a decided tendency for the distal articles like- 

 wise to be brown or brownish. Head uniform brown, the color being 

 of a lighter shade than that of the first segment. Antennae uniform 

 brown or with some of the median articles whitish in whole or in part. 



Head nearly smooth, the vertex crossed longitudinally by a short 

 median impressed line. Clothed rather densely over nearly the entire 

 surface with very short hairs. 



Antennae a little longer than the body is wide. Clavate, the sixth 

 article being considerably the thickest. 



First dorsal plate narrower than the head inclusive of genae and 

 than the second segment. Transversely sub-elliptical. Lateral cari- 

 nal margin with three teeth; a fourth tooth projecting from edge on the 

 cephalo-lateral curve. Tubercles in numerous rows ; strongly developed ; 

 apically acuminate and setigerous. The setae curved or frequently 

 hooked distally. A transverse impression or sulcus cephalad of the 

 row of tubercles along caudal border. 



Second segment strongly bent cephalad at the sides. On the cari- 

 nal margin immediately caudad of the acute denticle of the cephalo- 

 lateral angle is a more obtuse one and caudad of this five larger, low 



