1912] Chilopods and Diplopods 147 
Prosternal teeth 2+2, stout, conical, much closer together than in 
paucidens and also larger, but the proportion of anterior margin occu- 
pied larger than in that species. Ectal spines long and distally drawn 
out into slender, bristle-like, acute tip; the tubercles contiguous with 
outer tooth and not well removed from it as in paucidens. 
Coxal pores circular, rather small; 4, 3, 3, 3, in the types. 
Last four pairs of coxe laterally armed. Spines of first legs, 
et of second, eet of the third and fourth, aoa RS of 
eo ee ainath, ee of the tenth, ah - 5: >. of the eleventh, 
aaa 3! of the twelfth and thirteenth, 10.5.2 = of the penult, 
: 7 : ; : armed with two (3?) claws; of the anal, ‘ ‘. ; mo 
armed with two claws. Anal legs in the female short and moderately 
slender, the dorsal surface of femur and tibia distinctly longitudinally 
furrowed, the same articles of penult legs similarly but less strongly 
furrowed. 
Gonopods of female with the claw long and acute, strongly curved 
and chitinized. Proximal article excavated at base on mesal side, 
leaving a conspicuous lobe at distal end which projects mesad and meets 
the corresponding lobe of other gonopod; the caudal and mesal sides of 
this articles strongly chitinized as usual. Basal spines 2+2, stout, the 
inner smaller than the outer. Median process of sternite first clavately 
- widening caudad, and then attenuated to a slender acute point. 
Length of types 14 to 15 mm. A specimen (female) 14 mm. long 
has anal legs 5.8 mm. long and the tenth dorsal plate 2 mm. wide, the 
body being thus seven times as long as the width of this plate. The 
body moderately narrowed cephalad and the first’plate slightly narrower 
than the third whereas it is wider in paucidens. The widths of head 
and first, third, eighth and tenth dorsal plates to each other about as 
53, 47, 48, 57, and 57. 
Locality: Santa Monica, California (author, June, 1909). 
Genus Lithobius Leach. 
Lithobius devorans sp. nov. 
Dorsum from brown to chestnut and, in largest individuals in full 
color, almost mahogany. In lighter individuals the head is chestnut 
and clearly darker than the dorsal plates excepting the first in some in 
which it may approach the same color; in the more deeply colored 
individuals the head is deep chestnut or mahogany of scarcely deeper 
shade than that of dorsal plates. Antenne chestnut, usually paler at 
very tips only. Prosternum chestnut, the prehensorial feet more 
rufous. Venter fulvous to brown, the caudal plates always darker and 
either reddish or very deep brown. Legs colored like contiguous 
portion of venter, the caudal pairs being thus always darker. 
Head slightly wider than long (72: 70). Caudal margin straight or 
nearly so; posterior corners conspicuously and widely rounded, the 
