1S4 THE MYRIAPODA OF NORTH AMERICA. 



S. WHITEI. 



S. " capite aurantiaco, corpore flavo-virente, segniento cephalico brevi subcordato, antennis nudis, inoniliformibus, 

 labio leviter longitudinaliter cristate, utrinque oblique sulcato, pedum paribus 74. Long. unc. 1 1." 



Head orange; body yellowish green. Cephalic segment short, subcordate; antennae bare, moniliforin ; labium 

 lightly longitudinally crested; on each side obliquely sulcate ; pairs of feet ^4. Length, 1} inches. 



Geophilus Whitei, Newport, Linn. Trans., xix, p. 436. 

 " " Gervais, Apteres, iv, p. 321. 



" Hub. In America Boreali." 



Species mihi ignota. 



(1. attenuatus, Say, Journ. Acad. Nat. Sci., 1st series, vol. ii, p. 114. 



I have not been able to learn anything as to what species Mr. Say referred in his de- 

 scription, which throws no light on the subject ; possibly it belonged to the genus Mecis- 

 tocephalus. 



S. WALKERr, sp. nov. 



S. aurantiaca; capite parvo, sparse leviter punctato; mandibulis magnis, singula dente magno unico armata ; 

 scutis sine suturis; suturis sterno-cpistcrnalibus distinctis; pedibus utrinque 64; paris postremi coxis magnis, 

 foveis minutis multis impressis. 



Orange, head small, sparsely lightly punctate ; mandibles large, each armed with a single largo tooth; scuta 

 without sutures; sterno-episternal sutures distinct; feet on each side 64; coxae of the last pair large, impressed 

 with many minute pit*. 



The head is small and of a more reddish tint than the body. The antennae are of 

 medium length, filiform, not at all clavate, and very sparsely minutely pilose. The body 

 narrows much more gradually and somewhat more decidedly anteriorly than posteriorly. 

 The last pair of legs in the single specimen are small and slender; their coxa 1 are large 

 and pitted. Many of the sterna have three more or less obsolete depressions on their 

 anterior portion, and two larger ones on their posterior ; on some of them there is a longi- 

 tudinal mesial groove. I would dedicate this species to my friend and student. Robert 

 J. Walker, whose untiring energy in collecting has aided me so much in the preparation 

 of this monograph. 



Hub. Western Pennsylvania. — R. J. Walker. — Smithsonian Collection. 



S. I. 1 \ [PES. 



S. aurantiaca, robusta; capite i lice magno, sparse piloso; segmento basilar! margine antico postico nonnihil 



