184 



THE MYKIAI'ODA OF NORTH AMERICA. 



S. WHITE!. 



S. " capite aurantiaco, corpora flavo-virente, segrnento cephalico brevi subcordato, antennis nudis, moniliformibus, 

 labio lcviter longitudinalit-cr cristato, utrinque oblique suloato, pedum paribus 74. Long. uric. 1}." 



Head orange; body yellowish green. Cephalic segment short, subcordato ; antennae bare, moniliform ; labium 

 lightly longitudinally crested; on each side obliquely sulcatc ; pairs of feet 74. Length, 11 inches. 



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

 " " Gervais, Apteres, iv, p. 821. 



" Hah. In America Boreali." 



Species mihi ignota. 



Gr. attentjattjs, Sai/, 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. walkeri, sp. nov. 



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

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

 foveis minutis multis impressis. 



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

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

 with many minute pits. 



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

 medium length, filiform, not at all clavatc, 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? 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. 



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



S. LyEVIPES. 



S. aurantiaca, robusta; capite modice magno, sparse piloso; segrnento basilar! margine anfcioo postico nonnihil 



