Pomona College Journal of Entomology 657 



absent; tlie body otborwisr testaceous, tile liead with preliensorial feet darker 

 as usual. Tlie spiracles are all circular. In the eastern states, where this species 

 is common, the pairs of legs number most frequently forty-nine to fifty-one in the 

 male and fifty-one to fifty-three in the female; but in Californian s])ecimcns 

 studied, the numbers are most frequently fifty-nine to sixty-one, though in one 

 specimen but forty-seven were present. 



Two of the Californian specimens studied were collected on a sandy beach 

 at Pacific Grove by Miss Helen Nagel of Stanford, to whom I am indebted for 

 the same. They are large specimens which are paler than usual and lack the 

 dorsal dark band. The author has collected it also at Oroville (April, 1911). A 

 specimen collected at Claremont is among material received from Prof. Baker. 

 Wood reported three specimens, presumably this same species, from the Santa 

 Cruz Mountains under the name G. laevis. 



Geophilus regnans Chamheiiin 



A large species in which the body is wide anteriorly and attenuated caudad 

 much as in the preceding species. The anterior spiracles are obliquely elliptical, 

 the median and caudal ones circular. The number of pairs of legs is mostly from 

 seventy-seven to eighty-five, seventy-nine and eighty-one being perhaps common- 

 est. The length may be up to 70 mm. 



Evidently an abundant species in southern California. Numerous specimens 

 have been seen from the following localities: Claremont (Baker), Los Angeles 

 and Pacific Grove (author). It seems to be the commonest Geophilio about 

 Claremont. 



Geophilus nasintus Chamberlin 



Of nearly same form as the preceding, being narrowed but little cephalad 

 and strongly caudad. Fulvous in color, the head and prehensorial feet darker, 

 reddish. No frontal suture evident. The claws of the prehensorial feet when 

 closed about even witli the front margin of the head. Spiracles all circular. The 

 pairs of legs in the type specimen number seventy-three and the length of body 

 is 12 mm. 



The exact locality from which the type came is uncertain ; but the vial was 

 among material from southern California received from Prof. Baker and is 

 assumed to be from that region. 



Genus Arenophilus Chamberlin 

 In the species belonging to this genus at present known a frontal suture is 

 evident and the prebasal plate is absent or covered. The basal plate is trapezi- 

 form and conspicuously narrowed cephalad. The tripartite labrum has the free 

 margin of all the divisions pectinate, the processes of the lateral ones being long 

 and close set. The prehensorial feet are large and much exposed from above and 

 the claws when closed extend well beyond the front margin of the head; the 

 articles dentate within. The ventral pores are numerous and arranged in a single 

 condensed area on each sternite upon which occurring. The last ventral plate is 

 very wide. Each coxopleura with one or two large pits at or beneath edge of 



