THE CHILOPODA OF CALIFORNIA I 373 



Lithobius pusio Stuxberg. 



Head chestnut. Antennas dark on mesal side. Feet and venter gray. 

 Coxae of last pairs of legs armed ventrally and also laterally. Antennae short, 

 the articles short and stout, the ultimate equalling the four preceding taken 

 together. Ocelli on each side six in two series. 



Various points in Stuxberg's description of this species indicate that his 

 specimen was immature. Its validity is very doubtful. The description tits 

 immature specimens of B. monticola in certain stages; and the author is 

 convinced that it was such that Stuxberg had before him. However pusio is 

 Wept apart for the present in order that any vestige of doubt as to its standing 

 may be removed. 



The type was collected by Eisen near San Francisco. 



Lithobius pitophihis Chamberlin. 

 Dorsum brown or chestnut. Antennae rufous at tips. Spines of first legs 



2, 3, 2; of penult 1, 3, 3, 2; of anal 1, 3, 2, 0. Prefemur of anal legs of male 

 enlarged distad and the more distal joints inflated. 



Truckee (author). 



Lithobius obcsiis Stuxberg. 



Antennae short, consisting of 20 articles. Ocelli 10 or thereabouts in three 

 series. Coxal pores 2, 3, 3, 3 — 3, 4, 4, 4. Spines of 1st legs 1, 2, 1 ; of anal 

 1, 3, 2, 1. Antennas rather longer than anal legs Anal legs a little crassate 

 in both sexes. 



Sausalito (G. Eisen), Claremont and Catalina Is. (Baker), Stanford 

 (Mann), Monterey, Los Angeles. Laurel Canyon, San Bernardino (author). 



Lithobius clavigerens Chamberlin. 



Body, antennae and last pairs of legs brown ; other legs yellow. Spines of 

 first leg 1, 3, 2; of penult 1. 3, 3, 1, the claw armed with one spine; of anal 

 legs 1, 3, 2, 0, the claw unarmed. 



Pacific Grove and Laurel Canyon (Los .\ngeles Co.), (author) ; Clare- 

 mont and Catalina Is. (Baker). 



Lithobius castcllopes Chamberlin. 

 Brown, the legs and antennae yellowish. Spines of 1st legs 1, 3, 2 — 2, 



3, 2; of penult 1, 3, 3, 1, the claw with two accessory spines; of anal 1, 3, 2, 0, 

 the claw unarmed, 



Shasta Springs (author). 



Lithobius nianni, sp. nov. 



Greyish brown, the caudal margins of dorsal plates darkened; head brown, 

 paler over frontal region ; legs yellow or whitish, the last pairs darker. Ocelli 

 mostly about sixteen, arranged in four series 1 — 5, 5, 3, 2. Spines of first 

 legs 1, 3, 1 : of penult L 3, 3, 2 ; the claw armed with two spines; of anal 

 1, 3, 2, 1, the claw unarmed. .Antennas short, the articles 20, Last two coxae 

 armed laterally with a minute spine. Coxal pores 2. 3. 3. 2. Claw of gonopods 

 bipartite, or a third lobe minute. 



Stanford. (W. M. Mann). 



