THE MYRIAPODA OF NORTH AMERICA. 179 







A careful examination of two specimens of se.r*j)i unmix from Cheha- 

 lis, "VY. T., proves, as Dr. Wood has previously shown, that the western 

 and eastern specimens should be separated. The main difference lies 

 in the hirsuteness of the first antennal joints ; the differences mentioned 

 by Wood are hardly sufficiently distinct to separate the two forms. 



15. Scolopocrytops nigridius. 



IS&lScolopocryptopsnigridius'blcNeill. Proc. U. S. Nat, M.ViB.,333'(Bloomington, Iiid); 

 r.ullinan, Aim. N. Y. Aoad. Nat. Sri., 107, 1888 (K<,.rrill< . Tenn. i; l!..!lman, 

 ifL, 110 (Beavi-r Cr., Tenn.): Bnllmim, ibid., 112 (Mossy Cr., Tenn.). 



r. Monongahela City, Pa.; Bloomington, Greencastie, Salem, 

 Indiana ; Chapel Hill, N. C.; Beaver Creek, Mossy Creek, Kuoxville, 

 Tenn. 



Etymology. Latin, blackish. 



For the sake of completeness I give the folio win g description of ni- 



gridius. 



Head, antennae, first and last dorsal segments reddish brown; other 

 parts greenish brown ; legs paler, with the'femoral and tibial jointsof the 

 posterior pairs turquoise- green beneath. Moderately robust; sparsely 

 pilose; rather densely punctate, especially on head. Antenna- rather 

 short, articles rather long, all except the first two densely hirsute. 

 Coxae of prehensorial legs strongly callous, sinuate; coxal tooth short 

 and blunt. Anal legs short, tarsi densely pilose as in </i'cillx- infe- 

 rior spine large, interior small. Tarsi of anal and penultimate pairs of 

 legs unarmed, second tar sal joint, except that of the last four pairs of 

 legs, armed above. All the dorsal plates except the first three margi- 

 nate; two indistinct short sulci on the posterior part of the segment. 

 Anal pleur;r scabrous, densely porous; spine large, robust. Anal 

 sterna wide, sides slightly rounded, posterior margin emargiuate. 

 Length L'5-40"""; length of anal legs (>-<)""". 



This is the species mentioned by Cope (Proc. Amer. Phil. Soc., 17!>, 

 I860) as an undescribed /8W<;//wr///>/o/>.v with a " yreenish bo<ltj uml <( 

 reddish haul.'' 



16. Scolopocryptops gracilis. 



1862. Xi-olo)>orriipfnpx f/rKi'tHx Wood. Journ. Acnd. Nat. Sci. I'liila., ",s i /'/. Ti-jon, 



<'!.); Wood, Trans. Ameor. Phil. Soc., 17:'., lNir>. 

 18fi2. Scolopocriiptops lanatipea Wood. .loiirn. Acad. Nat. Sci. I'liila.. :!!! ^rnlif,i,-nin); 



Wood, Trims. Amer. Phil. Soc., 17.">. 1S(!5; Koblrausch, An-liivc Natiir^., 



56, 1881; Underwood, Ent. Amer., CL'. 1SS7. 

 1870. X<-i)l<>i><->-ii)>ti>i>x //ilij'nniii-ti Humbert A S;ius>nr<-. Jvev. iV, Mai^. /ool., L'OI (Cal- 



ifnniiii)\ II limb. A- Sanss., Miss. Sci. Mcx., 1872. 



Ilnhitot. Upper and Lower California. 



Etymoloyy. Latin, slender. 



Keccnt writers have used the name JtDntfipcN I'or lliis sjiecies; but, as 

 grwUix preceded lit>ifii><'x in Wood's monograph, it should be em- 

 ployed. 



