1903.] NATURAL SCIENCES OF PHILADELPHIA. 157 



6 Lithobius pitophilus sp. uov. 



Descriptions. — Brown or chestnut, legs and ventral surface paler, 

 antenna^ rufous at tips; dorsal plates smooth, with a few shallow 

 longitudinal furrows, glabrous; legs and prehensorial jaws sparsely 

 pilose; antennte moderately densely pilose. Head subcordate, wider 

 than long (7.25:6.75, nearly). Antennae with 20 articles, the ulti- 

 mate mostly shorter than the two preceding together. Ocelli on each 

 side: 12-13 in 3 series (1+3, 5, 3, 4). Prosternal teeth 2-2, acute. 

 Spines of first legs 2. 3, 2; penult legs having the claw with 2 accessory 

 spines, spines 1, 3, 3, 2; anal legs with the claw unarmed, spines 

 1, 3, 2, 0, femur in o ' enlarged distally and the tibial and tarsal joints 

 inflated; posterior coxae unarmed beneath, the last 3 armed dorsally 

 and laterally toward the dorsal surface. Coxal pores 4, 4, 5, 4-4, 5, 5, 5, 

 small and round. Gonopods of 9 : claw weakly tripartite or sul)- 

 entire; basal spines 2-2, stout. 



Length of body 11.5-13 mm. ; width of Sth dorsal plate 1.6-1.8 mm. ; 

 length of antennae 3.5 mm. ; length of anal legs 4 mm. 



Habitat. — Truckee, Cal. 



Etymology. — Greek -tV^^i-. pine, and fiV-o^. fond of , loving, i.e., "pine 

 loving," the specimens having been collected in the pine woods al)out 

 Truckee. 



7. Lithobius sastianus sp. nov. 



Description. — Testaceous-brown, posterior borders of principal dor- 

 sal plates mostly darker; legs paler; antennae brown at base, yellow 

 distally, head and dorsal plates hot strongly roughened, the plates 

 with distinct longitudinal rugae ; venter a little roughened ; entire body 

 sparsely pilose, the legs more densely so; antennae moderately densely 

 clothed with long stiff hairs. Head a little wider than long (5.5-5 

 A-ery nearly). Antennae: articles 20, short excepting the first few. 

 the ultimate a little longer than the two preceding together. Ocelli 

 on each side : 10, arranged in 3 series (1-1-4, 3, 2), those of the upper 

 row largest, those of the middle row intermediate. Prosternal teeth 

 2-2, small. Spines of the first legs 1. 2, 1 ; penult legs with 1 accessory 

 claw, spines 1, 3, 3, 1 ; anal legs with the claw unarmed, spines 1, 3, 3, 1 ; 

 the last 3 pairs of coxae armed with a spine dorsally, the last 2 also 

 laterally. Coxal pores very small, round, 2, 2. 3, 3-3, 3, 4, 3. Gono- 

 pods of 9 : claw tripartite, the lobes all short, not very acutely pointed ; 

 basal spines 2-2, acuminate, the two outer longer than the inner ones.. 



Length of body 8 mm.( 9 )-8.5 mm. (o ) ; width of 8th dorsal plate 



