188 



TIIE MYRIAPODA OF NORTH AMERICA. 



Deep orange, polished; body anteriorly strongly, but posteriorly slightly narrowed; head small; cephalic seg- 

 ment suborbicular, impunctate; antennae rather long, filiform, not acuminate, sparsely pilose, articles somewhat 

 obconic ; mandibles thick, sparsely shortly pilose, obscurely tridenticulate ; anterior denticule on each side, large, 

 conical acute; labium broad, short, impunctate, scarcely emarginate, impressed with an obscure median sulcus; 

 scuta without sutures; feet rather long, slender, with a few short hairs, together with the ventral surface dirty 

 orange, on each side 71; last pair (in female only?) small, slender; sterna impressed with the sterno-episternal 

 sutures and a median sulcus. 



S. parviceps, Wood, Journ. A. N. S., new series, vol. v, 1863, p. 49. 



In the only specimen that I have seen the mandibles are perfect, with the exception 

 that they lack the mandibular tooth, probably the result of an accident ; but it is rather 

 enrions that both should be lost and the remainder of mandibles be uninjured. The head 

 appears to be destitute of punctations. Length, 2\ inches. 



Hub. California. — Smithsonian Collection. 



S. EPILEPTICA. 



S. polita; corpore antice valde sed postiee modice angustato, supra saturate sed subtus dilute aurantiaco; eapite 

 parvo; segmento cephalico suborbiculare, albomaculato ; segmento basali subbasali longiore ; antennis longis, iili- 



formibus, baud acuminatis, partim pubescentibus, ar- 



Fig. 21. 



Fi K . 22. 



ticulis non nihil obconicis; mandibulis crassis, distincte 

 tridenticulatis, dentieulo antico magno, conico, acuto; 

 labio convexo, copiose minute albomaculato, antice 

 leviter emarginato, sulco mediano impresso; scutis 

 longis, latis, sine suturis ; pedibus gracilibus, modice 

 longis, dilute aurantiacis, utrinque 81 ; pari postremo 

 (in femina solum ?) parvo, gracile, baud antenni- 

 forme ; sternis suturis sterno-episternalibus et sulco 

 mediano impressis. ( Figs. 21, 22.) 



Polished ; body anteriorly strongly, but posteriorly 

 moderately narrowed. Above deep, below dilute 

 orange; cephalic segment suborbicular, sparsely mi- 

 nutely spotted with white; basal segmeut longer than 

 the subbasal ; antennae long, filiform, not acuminate, 

 partly pubescent; joints somewhat obconic; mandi- 

 bles thick, distinctly tridenticulate ; anterior denticule 

 large, conical, acute; labium convex, copiously mi- 

 nutely spotted with white; anteriorly somewhat emarginate, impressed with a median sulcus; scuta long, broad, 

 without sutures; feet slender, rather long, light orange, on each side si; last pair (in female only?) small, 

 slender, not antenniform ; sterna impressed with sterno-episternal sutures anil a median sulcus. 



