880 THE CANADIAN ENTOMOLOGIST. 



Claw of gonopods in the female tripartite. Basal spines 2 + 2, 

 cylindrical or clavate at base, the upper portion conical and excavated on 

 one side, and sometimes with accessory points at base of conical portion. 



Length, 17.5 mm.; width, ad 2 mm. 



Localities. — Sausalito (type locality) and Mill Valley. 



The species was found to be common in both these localitie.=:. The 

 identification of this species with Siuxberg's pusio would have been 

 difficult, or nr.ore probably, impossible, had it not been for the statement 

 in regard to the spining of the posteiior co.\^ : " Pedum analium 

 arlicLilus primus calcaribus binis, majore ventrali, minore laterale, 

 armatus." As among the North American Lithobiomorpha known to the 

 author, only the species of Bothropolys have the posterior coxre armed 

 with a ventral spine, he concluded that the type oi pusio belonged to this 

 genus, and, since Stuxberg represents the coxal pores as being in a single 

 series and few in number, that it must be immature. As the species 

 above described is common in the type locality and the only member of 

 the genus of the coastal region having all dorsal plates straight, its identity 

 with pusio is obvious. Young specimens agree fully with Stuxberg's 

 account. 



3. Lithobius kochii Stuxberg. 



1875. Ofvers. af Kgl. Vet.-Akad. Forhandl, No. 2, p. 69; No. 



3^ P- 30- 

 A half dozen specimens conforming fully to the original description 

 were taken at Sausalito, the type locality. It had previously been taken 

 at Ukiah (probably), Stanford, Pacific Grove and Ciaremont, 



4. Lithobius obesus Stuxberg. 



1875. Ofvers. af Vet.-Akad. Forhandl., No. 2, p. 67 ; No. 3, p. 31. 

 This very distinct species was found to be very common at Sausalito, 

 the type locality, from where it seems to range southward to Los Angeles 

 Co., the author having in his collection specimens from Stanford, Pacific 

 Grove and Monterey, Los Angeles, Laurel Canyon, San Bernadino, 

 Ciaremont and Catalina Island. 



5. Lithobius tiganus Chamber lin. 



1 909. Lithobius utahensis Chambeilin (ad max. part.), Ann. Ent. 

 Soc. America, p. 187. 



1 910. Lilhob'us utahensis, var. tiganus Chamberlin, P. C. Journ. 

 Ent., p. 374. 



