ON THE CTIILOPODA OF NORTH AMERICA. 39 



Specimens belonging to the Smithsonian Institution. 

 301 | 18 | Fort Tejon, California. | J. Xantus de Vesey. | | Unc. |— 2 | 



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

 mento-cephalieo subovato; antennis pubescentibus ; labii margine antico lato, fere reeto, medio vis 

 emarginato; scutis modice rugosis, puDetatis, marginibus lateralibus elevatis; pedibus postremis 

 elongatis, gracillibus, spinis duobus S. sesspinosas illis simillirui?, articulo basali tibiali longiore; appen- 

 dicibus aDalibus lateralibus valde elongatis, rude punctatis, sirjgula spina apieali unica alteraque in 

 angulo posteriore superiore ; squama preanali modiee breve, postice rotuudata, vix emargioata. 



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



Specimens belonging to Smithsonian Institution. 



283 



2 



Shoal Water Bay, W. T. 



Gov. I. I. Stevens. 



Dr. J. Cooper. 



Unc. 14—2 



153 



6 



Oregon. 



1 



1 



" 14— If 



189 



1 



N. Western U. S. 



A. Campbell 



Dr. Kennerly. 



" 2 



S. lanatipes, n. sp. — S. aurantiaca, pedibus eompressis, flavis; capite mandibulis labio sternisque minute 

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

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

 ticulo tibiali basali fere a:quali, tibia tarso metatarsoque pubescentibus; appendicibus analibus late- 

 ralibus brevibus, rude punctatis, singula spina apieali alteraque minutissima in angulo superiore poste- 

 riore ; squama preanali modice lata, subtus convexa, margine postico interdum late emarginato. 



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 

 are more robust, with the tibia about equal to the femur 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 over the lateral anal ap- 

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

 larger size. 



Specimen belonging to the Smithsonian Institution. 

 308 | 5 | California. | ? | ? | Unc. 1.4— 2| | 



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

 specimen : 



S. quadraticeps, n. sp. — S. brunnea, venuste polita; capite saturate rubrn, profunde punctato; segmento 

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

 centibus ; labio profunda puuetato, margine antico lato, medio leviter emarginato; mandibulis profunda 



