Pomona College Journal of Entomology 473 



BB. Timor .si)inp of ])refeniur well dcvclojird ; lateral angles of the last 



florsal plate not at all spinous pointed; last ventral plate with caudal 



niarf>in eonspicuously concave. O. mundus sp. nov. 



AA. \\'ntral jilates smooth, without a median furrow; dorsal scuta without a 



median furrow; ceplialic plate margined laterally as well as at caudal 



angles. 0. sexspinosus Say. 



Otocryptops gracilis Wood 



Yellowish hrown to ferruginous or yellowish red in color. All articles of the 

 antennip hirsute or the dorsal surface of the first alone smooth. Prosternum 

 mostly with two small teeth. The median furrow of ventral plates deep and 

 widened at middle of length. Processes of pseudopleurae sliort. Prefemur with 

 ventral spine well developed, the inner one obsolte or absent. 



Fort Tejon (type locality, Wood) ; Los Angeles (author) ; Claremont (com- 

 mon, Pomona College Coll.) ; Stanford (Mann). 



Known only from California, where it is commonest in the southern portion 

 of the state. It lias not been recorded from north of Stanford. The species is 

 closest to the following one; 



Otocryptops mundus sp. nov. 

 (Figure ISfi, A. B, E. F) 



Head mostly smooth, finely punctate, especially over caudal and caudo-lateral 

 portions. ^largined eaudo-lateral and also to some extent laterally. All articles 

 of antenniE pubescent or the first article smooth dorsally as in gracilis. Dorsal 

 plates ,5-22 strongly margined laterally, the fourth more weakly so, the twenty- 

 third weakly so. Median furrows on dorsal plates much as in gracilis. Last 

 dorsal plate but slightly narrowed caudad, caudal border less extended than in 

 gracilis, the lateral angles rounded and wholly without indications of spinous 

 point. Prosternum without teeth. Ventral plates from one to twenty-one with 

 a longitudinal median furrow. Last ventral plate rather deeply excavated 

 caudally. Pseudopleura> with conspicuous, pointed caudal processes, decidedly 

 longer than in preceding species. Anal legs very long and stout; both ventral 

 and inner spine of prefemur stout and conspicuous. Brown ; head and last seg- 

 ments reddish ; legs and antennae yellowish or yellowish brown, anal legs 

 darker. Length ad 60 mm. 



Kendrick, Idaho (Mann), is the onl}' known locality thus far. 

 The species is very close to the preceding and might even be with reason re- 

 garded as a subspecies to it. 



Otocryptops sexspinosus Say 



Brownish to deep rust red. Antennas usuallj' with the first two articles 

 glabrous and shining, the others densely hirsute. The prosternal margin nearly 

 straight and smooth, without any indications of teeth. Prefemur of anal legs 

 with both ventral and inner spine conspicuous. Pseudopleural processes large. 

 Ventral plates smooth, without median furrow. No median dorsal furrow or line. 



One of the commonest of all ehilopods throughout most of the state but becom- 



