50 ON THE CHILOPODA OF NORTH AMERICA. 



segment basili subbasali lorigiore ; antennis longis, filiformibus, baud aeuminatis, parti in pubeseentibus, 

 articulis vix obconicis ; mandibulis crassis, distinote tridenticulatis, denticulo antico magno, conico, 

 acuto; labio convexo, copiose minute albornaculato, antice leviter emarginato, suleo mediano impresso; 

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

 postremo (in femina solum ?) parvo, gracife, baud antenniforme; sternis suturis sternoepisternalibus et 

 sulco mediano impressis. 



This is much the largest Geophilid as jet 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. Kennerly. | Unc. b$ | 



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

 quadrato, postice medio canaliculato ; antennis pilosis haud aeuminatis, articulis (ultimo excepto) 

 obconicis; mandibulis dente modico in margine interno armatis ; suturis scuto-episcutalibus interdum 

 obsoletis sed plerum^ue distiuctis ; pedibus pilosis utrinque 43, pari postremo (in femina solum?) 

 gracile, parvo ; sternis et vel canaliculars vel depressione subcirculare notatis et suturis sternoepister- 

 nalibus valde impressis. 



The distal joint of the filiform antennas 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 | i> j Fort Simpson, Red River. R. Kennicqtt. I'nc. \ — | 



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

 of the Smithsonian Institution : — 



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

 antice cvanescentibus ; corpore robusto, et antice et postice modice augustato; segmento cephalico breve, 

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

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

 cutalibus distinetis ; superficie ventrali fere albida ; sternis suturis sterno-episternalibus et sulco raediauo 

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

 solum ?) parvissimo, 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 Choo Islands. | N". Pacific Expl. Exp. j W. Stimpson, M 1> | , Una 2J | 



