ON THE CHILOPODA OF NORTH AMERICA. 



45 



The cephalic segment has the sides moderately arched, with the anterior angles 

 very strongly rounded. The dorsal median line is entirely wanting on the anterior 

 portion of the body. The feet generally are without any hairs, but there are a few 

 on some of them. There are two specimens in the museum of the Academy, collected 

 in Georgia by Dr. J. Le Conte. 



G. brevicornis, n. sp. — G. saturate aurantiacus, robustus, venuste politus ; capite aurantiaco ; segtuento 

 cephalico parvo, sparse subprofunde punctata ; aatennis pilosis, brevibus ; ruandibulis sparsissime pilosis, 

 indistincte quadridentatis, utrinque denticulo unico (interdum duobus) niodiee magno ; labio subpro- 

 funde punetato, antice emarginato, medio canaliculato; pedibus compressis utrinque (? in mare) 55, 

 (? in feinina.) ? 



Scuto-episcutal sutures very distinct, as are also the sterno-episternal. Scuta gene- 

 rally cpuite smooth. Body of each of our specimens subcylindrical. We were at first 

 disposed to consider these as the males of the following species, but it seems to us most 

 probable that they are distinct. The principal differences are found, first, in the size 

 of the cephalic segment and length of antennas ; second, in the punctations of the head ; 

 and finally, in the number of segments and robustness of body. 



Specimens belonging to the Smithsonian Institution. 



276 

 350 



On the route from New Orleans to Galveston. 

 S. Illinois. 



E. B. Andrews. 

 R. Kennicott. 



Une. 2. 



G. bipuncticeps, n. sp. — G. dilute aurantiacus, gracilis, venuste politus; segmento cephalico saturate au- 

 rantiaco, magno, antice leviter emarginato, et labio mandibulisque et copiose profunde et dense minutis- 

 sime punctatis; antennis modice longis, dense pilosis, antice fere pubescentibus ; labio leviter emargin- 

 ato, medio canaliculato; mandibulis magnis, crassis, indistincte quadridentatis, utrinque denticulo unico 

 (interdum duobus) modice magno; pedibus brevibus, sparsissime pilosis, utrinque (in mare ?) 61 (in 

 femina?) 63. 



The general arrangement of the larger punctations on the cephalic segment is as 

 follows : On each side of the posterior mesian portion there is a longitudinal series 

 of punctations ; on each side of the latter is a broad patch of the same, and anteriorly 

 they are disposed in transverse series. No such method is discoverable in the pre- 

 ceding species. The color in all the specimens we have seen is somewhat lighter, and 

 the body less robust and perhaps more uniform than in G. brevicornis. The labium 

 is of the same shade as the cephalic segment, but the basilar and subbasilar are colored 

 like the body. The dorsum has occasionally an indistinct dark median stripe. The 

 scuto-episcutal and sterno-episternal sutures are very distinct. The sterna have a me- 

 dian groove. We have seen an individual belonging to the collection of the Museum 

 of Comparative Zoology, which has 65 pairs of feet on each side, but yet in other 

 respects agree entirely with the others. 



Specimens belonging to the Smithsonian Institution. 



South Illinois. R. Kennicott. 

 Charleston. ? 



Sonora. T. D. Graham. 



12 



266 



3 



285 



1 



279 



5 





Unc. li— 2{ 





" 11 





" U— 11 



