382 THK CANADIAN ENTOMOLOGIST. 



Ocelli 6 on each side, arranged in two series, thus, 1+3, 2. 



Prosternal teeth 2 + 2, moderate in size, darkened, the inner one on 

 each side larger than the outer. 



Angles of the ninth, eleventh and thirteenth dorsal plates produced. 



Coxal pores 3, 3, 3, 3, circular. 



Last pair of coxre armed laterally with a short, stout spine; last three 

 pairs armed dorsally with much longer spines. 



All tarsi biarticulate, 



Spines of the first legs o, i, i-o, 2 (?), i ; of the i)enult i, 3, 3, 2, 

 with two claws; of the anal 1, 3, 3, i, also with two claws. 



Anal legs in male slender and moderately long. 



Locality. — Oakland, Cal. 



Three males were secured, of which two are but partly grown, and 

 the third lacks a little of maturity. The form is very close to Z. Angelus 

 Chamberlin, described originally from Los Angeles, but also found by the 

 author at Croville (April, 191 1 ) ; it differs in the greater number of articles 

 of the antennae, which seems to be constantly 28 or 29 in angelus and in 

 their size and form, in the spining of the legs, the form of the anal legs, 

 etc. 



8. Pseudoliihobius megaloporus (Stuxberg). 



1875. Lithobius megaloporus (Stuxberg, Ofvers. Kongl. Vet.- 



Akad. Forhandl., and Ann. and Mag. Nat. Hist., p. 190). 

 1875. Lithobius megaloporus, subgenus Pseudolithobius Stuxberg, 



Ofvers. Kongl. Vet.-Akad. Forhandl., No. 3, p. 8. 



1 9 10. Pseudolithobius megaloporus Chamberlin, P. C. Journ. Ent. 



Body wide anteriorly, parallel sided over most of length, attenuated 



caudad. All dorsal scuta strongly margined laterally, rugose. Sternal 



plates, especially the more posterior ones, broadly produced caudad, so 



that each at the middle more or less overlaps the succeeding one. 



Dorsum brown, the first dorsal plate commonly darker and more 

 rounded, and the scuta frequently darkened along caudal border. Head 

 and presternum with prehensorial feet a little darker and more reddish 

 than the dorsum. Antennae brown, uniform. Venter and legs a paler 

 brown, uniform in most. 



Antennae short, composed of twenty articles, which are moderate and 

 mostly uniform in size. 



Eyes small, composed of few ocelli, the number on each side being 

 mostly 5 or 7, which are arranged in two series, thus, i +3, 2-1 +3, 3. 



