ON THE CHILOPODA OF NORTH AMERICA. \:> 



S i ITICEPS, d. sp. — S. dilute aurantiaoa; capite magno, impunctato; o eepbalieo lato, br< 



trans verso, quinqueaugulato, segmentis basal i subbasalique marginibus curvatis el angulis anticis pro- 

 longatis ; antennis brevibus, crassis, cylindicis, antice puboseeutiliu- ; 1 . nonnihil cow 



baud canaliculate ; mandibalis par\ is, singula intus denticulo obtuso indistincto ; pedibus subcompressis, 

 gracilibus, utrinque 81, pari postremo (in mare solum i^ nonnihil crasso, cjlindrico, baud acuminato 

 coxis n: ;i u'ti i ^ ; -tvrn i -; depressione lineari-ovata transversa et suturia sterno-episternalibus signatis; 

 squama preanali valde canaliculata, postice valde emarginata, angulis posticis subacutis. Lon;.: one. 3. 



The anterior of the two scuta covering each segment is very distinct from the 

 other, and is much wider at its posterior than at its anterior margin. The posterior 

 has its lateral margins arcuate but not elevated. The scuto-episcutal sutures are very 

 distinct. Posteriorly there is an obsolete dark median dorsal line. 



//./A. — Texas. Museum of Comparative Zoology; Geo. Stolley, Esq. 



5 OKPHALICA, n. sp.— S sordide dilute brunnea, Buperficie dorsali liueis pullis duabus, obsoletis; cor 

 pore uiou -t>>, antice leviter Bed postice illico valdeque angustato; capite magno; segmento 



cephalico subtriangulare, impunctato, basali postice leviter dilatato ; antennis baavissimis, latis, depressis, 

 haud pilosis, artioulis brevissimis, elongate quadratis; labio inipunctato, medio canaliculato, antice 

 leviter emargioato ; mandibulis erassis, baud denticulatis ; scutis suturis scuto-episcutalibus leviter im- 

 pressis ; pedibusg racilibus, modice brevibus, baud pilosis, utrinque 7,~>, pari postremo (in femina solum ?) 

 parvo, gracile ; sternis suturis sterno-episternalibus et sulco mediano impres 



The two dark lines on the dorsum are very obscure and are evanescent anteriorly. 

 The cephalic segment is quite acute anteriorly. The legs are rather lighter in color 

 than the body, and are shorter than in the preceding species. 



Specimen belonging to the Smithsonian Institution. 

 129 | 1 | California. | ? | | (Jnc. 2\ \ 



S PARVIi EPS, n sp. — 9 -aturate aurantiaca, polita ; corpore modice robusto, antice valde sed postice 

 leviter angustato; capite parvo, segmento cepbalico suborbiculare, impunctato; antennis modice longis, 

 61iformibus, baud acuminatis, Bparse pilosis, articulis vix obconicis; mandibulis crassis, sparse breve 

 pilosis, obscure tridcnticulatis, denticulo antico utrinque magno conico acuto; labio lato, breve impunc- 

 tato, antice vix emarginato, sulco mediano obscure impresso; scutis sine suturis; pedibus modice longis, 

 gracilibus, pilis brevibus paucis. et supcrtieie ventrali sordide aurantiaeis, utrinque 71, pari pos- 

 tremo (in femina solum ''.) parvo, gracile ; sternis suturis sterno-episternalibus et sulco mediano impresso. 



In the only specimen that we have seen the mandibles are perfect, with the excep- 

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

 rather curious that both should be lost and the remainder of mandibles be uninjured. 

 Tin' head appears to he destitute of punctations. 



Specimen belonging to tin Smithsonian Institution. 

 :;ll I 1 I California. | I ? I f ' nc - -1 I 



S. EiMi.F.l'TiCA, n. sp. — S. polita; corpore antiee valde sed postice modice angustato, supra saturate sed 

 subtus dilute aurantiaco; capite parvo; segmento cephalico suborbiculare, sparse minute albomaeulato; 



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