oN THE CHILOPODA OF NORTH AMERICA. 39 



Specimens !>• the Smith 



1 | Is | Fort Tejon, California. | J. Xantus de Vesey. | | Unc. f— 2 | 



S. spinicacda, n. sp. — S. aurantiaca, polita; capite labio mandibulis sternisque profunde punctatis; seg- 

 mento-cepbalico subovato; aDtennis pubescentibus; labii margine antico lato, fere recto, medio vix 

 emarginato; scutis modice i punctatis, marginibus lateralibus elevatis; pedibus postremia 



eloDgatis, gracillibus, sj.inis duobus S. - xspinosae illi> siniillimis, articulo basal i (ihiali longiore; appen- 

 dioibns analibua lateralibus valde . rude punctatis, singula spina apicali uniea alteraque in 



angulo posteriore superiors; squama preanali modice breve, postico rotundata, \i\- em 



The head is deeply punctate. The scuta somewhat rugous with the sento-episcutal 

 sutures traceable. The sterna are without any traces of sutures. The whole body is 

 more or less deeply punctate. The superior posterior angle of the lateral anal appen- 

 dages is slightly prolonged and armed with a rather small black spine, which is. how- 

 ever, considerably larger than in any other species known to us. The posterior legs 

 are exactly like those of S. sexspinosa, Newp. 



i t<i Smithsonian Institution. 



. n. sp. — S. aurantiaca, pedibus comprcssis, tlavis ; capite mandibulis labio sternisque minute 

 punctatis ; segmento cephalico subovato; labio medio cmarginato fere sicut in S. gracile, margine antico 

 rotundato ; pedibus postremis modice robustis, singula spinis duobus S. sexspinosaj illis siniillimis, ar- 

 ticulo tibial) basali fere aequali, tibia tarso metatai ique pubescentibus; appendicibus analibus late- 

 ralibus ImyiliMs. rule punctatis, singula spina apicali alteraque minutissima iu angulo superiore poste- 

 riere; squama preanali modi ibtus convexa, margine postico interdum late cmarginato. 



This species is closely allied to S. gracilis, and it is possible that further specimens 

 may show that the characters on which we rely in separating them vary. The dif- 

 ferences are as follows: The labium closely resembles that of the first described 

 species, but has the character perhaps not so well marked. The posterior pair of legs 

 tire more robust, with the tibia about equal to the lemur in length, and pubescent. 

 The lateral anal appendages are shorter and separated inferiorly by a much narrower 

 space. The preanal scale is rather broader and more bent o^er the lateral anal ap- 

 pendages; and, finally, judging from our specimens, this species seems to attain to a 

 larger size. 



Spi 'onging to the Smithsonian Institution. 



308 | 5 | California. I ' I ? I Uuc - H — ^-1 | 



Besides the above described species, there is in the collection the following foreign 

 specimen : 



S. '," ADEATIOEPS, n. sp. — S. brunnea, venuste polita; capite saturate rubrn, profunde punetato; segmento 

 cephalico quadrato, antice haud angustato, medio emarginato, augulis rotundatis ; antennis antice pubes- 

 centibus ; labio profunde punctate, margine antico lato, medio leviter emarginato; mandibulis profunde 



t 



