50 ON THE CIIILOPODA OF NORTH AMERICA. 



segment basali subbasali longiore ; antennis longis, filiformibus, baud acuminatis, partim pubeseentibus, 

 articulis vis obconicis; mandibulis crassis, distincte tridcnticulatis, dcnticulo antico magno, conicn, 

 aeuto ; Iabio convcxo, copiose minute albomaculato, antice lcvitor emarginato, sulco mediano impresso; 

 scutis longis, latis, sine suturis; pedibus gracilibus, modice longis, dilute aurantiacis, utrinque 81, pari 

 postremo (in feniina solum ?) parvo, gracile, baud antennifurmc; sternis suturis sterno-episternalibus et 

 sulco mediano impressis. 



This is much the largest Geophilid as yet found within our limits. The greatest 

 breadth of the scuta is about two lines. The white dots on its head are very minute, 

 resembling punctations. 



Specimen belonging to the Smithsonian Institution. 

 297 | 1 | Puget's Sound. | A. Campbell, Com. N. W. B. S. | Dr. C. 13. Kennedy. | Unc. 54 | 



S. CHIONOPHILA, n. sp. — S. aurantiaca gracilis, parva, venuste polita; segmento cephalico fere sub- 

 quadrato, postice medio canaliculate ; antennis pilosis baud acuminatis, articulis (ultimo excepto) 

 obconicis j mandibulis dente modico in inargine interno arrnatis ; suturis scuto-episcutalibus interdum 

 obsoletis sed plerumque distinctis ; pedibus pilosis utrinque 43, pari postremo (in femina solum'/) 

 gracile, parvo ; sternis et vel canaliculatis vel depressione subcirculare notatis et suturis sterno-epister- 

 nalibus valde impressis. 



The distal joint of the filiform antennae is large and cylindrical, causing them to 

 appear somewhat clavate. This species is a very interesting one, from the fact of its 

 inhabiting a region so near the Arctic circle. Its diminutiveness shows that the 

 Myriapoda form no exception to the general decrease in size observable among the 

 lower animals as we leave the Equator. 



Specimens belonging to the Smithsonian Institution. 

 258 | 3 | Fort Simpson, Red River. | R. Kennicott. | [ Unc. 4— f | 



Besides the American species, there are the following foreign ones in the collection 

 of the Smithsonian Institution : — 



S. TiENlOPHERA, n. sp. — S. incana, superficie dorsali lineis duabus subnigris, confertim approximatis, 

 antice evaDescentibus ; corpore robusto, et antice et postice modice angustato; segmento cephalico breve, 

 subtriangulare, sordide albo, impunctato ; antennis cylindricis, modice crassis brevibusque; labio con- 

 vexo, impunctato, antice vix emarginato, sine sulco; mandibulis haud denticulatis; suturis scuto-epis- 

 cutalibus distinctis ; superficie ventrali fere albida ; sternis suturis sterno-episternalibus et sulco mediano 

 impressis; pedibus brevibus, gracilibus, anticis sordide albidis, utrinque 81, pari postremo (in femina 

 solum ?) parvissiruo, gracile. 



The color of this animal is a light grey ; that of the head, the anterior feet and the 

 belly approaches a dirty white. The median dark stripe is composed of two closely- 

 approximated lines, and is evanescent anteriorly, but posteriorly ends rather abruptly 

 at the anal scutum. It is much more apparent in some portions of the body than in 

 others. The median sulci of the sterna are very short, not extending through the 

 whole length of each sternum. 



260 | 1 | Loo Choc- Islands. | N. Pacific Expl. Exp. | W. Stiinpson, M . 1>. | Unc. 2J | 



