THE MYRIAPODA OF NORTH AMERICA. 41 



Coxal pores two; anal legs of male strongly crassate; pairs of legs, $ 47 to 

 49, 9 51 to 53; dorsal plates with a broad, double, black median 



line cephalicus Wood. 



cc. Coxal pores more than two. 



d. Pairs of legs, 9 51; coxa of anal leg not strongly inflated, pores large, ten 



or twelve, subseriate mordax Meinert. 



dd. Pairs of legs, 9 71, $ 67; coxa of anal legs strongly inflated; pores 

 about same number, large ami small, partly concealed by ventral 



plate oircn i Bollman. 



aa. Frontal plate absent. 

 b. Anal pores absent. 



c. Coxal pores absent; coxa of prehensorial legs armed; pairs of legs, ^ 67 to 



69, 9 61 to 65 bipimeliceps Wood. 



cc' Coxal pores present. 



d. Coxal pores one, concealed ; prebasal plate concealed ; coxa of prehensorial 



feet twice as long as wide; pairs of feet, 2 61.. georgianua Meinert. 



dd. Coxal pores two. 



e. Prebasal plate concealed ; anterior coxal pore hidden by ventral plate ; 



teeth of prehensorial legs distinct ; pairs of legs, $ 67 to 69, 9 61 to 



66 perforates (McNeill).* 



ee. Prebasal plate exposed as in cephalicus; coxal pores like perforates; 

 teeth of prehensorial legs very indistinct; pairs of legs, $ 61, 9 



63 olCOlOHCB BOLLMAN.t 



bb. Anal pores present; coxal pores arranged in two partly covered series; 

 pairs of legs, 9 61 Jatro Meinert. 



11. Geophilus californiensis, sp. nov. 



Diagnosis. — (Frontal plate absent; anal pores present); attenuated 

 from head backwards; coxa of prehensorial legs unarmed; antennae 

 long; coxal pores rather large, over 30; pairs of legs, 9 64 to 67. 



Type.— IT. S. Nat. Museum. 



Habitat.— TJkiah, Cal. 



This species may be easily separated from those which have the 

 "frontal plate absent and anal pores present" by the characters assigned 

 in the diagnosis. 



The following is a complete description of type: 



Eeddish orange, head darkest, rather robust, widest before, moder- 

 ately smooth, sparsely pilose Prehensorial legs reaching to base of 

 second autennal joiut; coxa longer than wide (4.5:3), unarmed; tooth 

 small. Cephalic plate sparsely pilose aud punctate, the latter forming 

 two sulcations, longer than wide (7:5); basal plate partly concealed, 

 thrice as wide as long; prebasal not exposed. Antennae long, joints 

 long, penult, and antepenult, shortened. 



Dorsal plates distinctly bisulcate; anterior predorsal plates short, 

 posterior longest; ventral plates with an indistinct median depression. 

 Spiracles round, anterior large, median aud posterior small. First pair 

 of legs short, anterior and posterior subequal, former stouter. 



Coxa of anal legs strongly swollen, pores rather large, over 30; last 

 ventral plate moderately wide (1.5: 2), sides converging. 



* Schendyla ? perforates McNeill, Proc. U. S. Nat. Mus., 325, 1887. (Pensacola, Fla.) 

 t Geophihis okolonw Bollmau. Ent. Amer.. 5, 1888. (Okolona, Ark.) 



