42 ON THE CIIILOPODA OF NORTH AMERICA. 



antennis sparse pilosis ; labio dense minutissime punctato, medio valde canaliculate, utrinque maculis 

 tribus nigris; mandibulis intus vis denticulatis ; iateribus nigro maeulatis; scuto postremo dilute au- 

 rantiaco ; suturis scuto episcutalibus indistinctis; pedibus corn pressis, utrinque fere 50, pari postrcino 

 gracille ; sternis suturis sterno-epistcrnalibus et sulco mediano impressis. 



The two black bands are somewhat irregular and so broad that it would, perhaps, 

 be correct to describe the dorsum as black, with a single median and two longitudinal 

 light stripes. The labium has, in our specimen, three black dots on each side, but 

 we suspect that these are not constant. The mandibles have, on their inner edge, 

 the rudiments of a denticle. We have had great difficulty in determining the number 

 of feet in our specimen, but think that fifty pairs are very near the mark. 



There is in the Museum of the Academy a single specimen, collected in Georgia 

 by Dr. John Le Conte. The length is about an inch. 



M. limatus, n. sp., (fig. 9). — M. ? aurantiacus, venuste politus; eapite appendicibusque saturate rubris, seg- 

 mento cephalico ordinatim punctato, a fronte ordinatim angustato, segmento basali labioque Iambus ; 

 antennis sparse longe pilosis ; labio valde emarginato, medio leviter canalieulato ; mandibulis magnis, pilis 

 longissimis, singula denticulationibus magnis, obtusis, 4 ; pedibus flavis ?, pilosis, utrinque 43 — 44, 

 postremis valde elongatis ; scuto postremo elongate 



The alcohol, in which our specimens were preserved, having evaporated, they are 

 in such a condition that we can only guess at the original color of the body and feet. 

 The scuto-episcutal sutures are very distinct, as well as the subsegmental sutures of 

 each fully-formed segment. The sterna are furnished with a median sulcus deeply 

 marked on the posterior, but obsolescent on the anterior portion of most of them. 



Specimens belonging to the Smithsonian Institution. 

 310 | 3 | California. | ? | ? | Unc. 21 | 



Of foreign species there are in the collection of the Smithsonian the following speci- 

 mens : 



M. rubriceps, n. sp. — M. flavus, aut dilute aurantiacus; eapite rubro, magno; segmento cephalico postiee 

 illico angustato, haud rotundato, basalique et labio mandibulisque punotatis ; antennis proximis valde 

 pilosis, ultimis pubescentibus ; mandibulis crassis, pilis paucis, singula denticulis magnis obtusis 5; 

 corpore supra subtusque linea media obscura; pedibus pilosis, utrinque 48, paribus postremis valde 

 elongatis, graeillibus. 



Color of the antennae between that of the head and body, being a shade of orange. 

 Cephalic segment with the posterior third rapidly narrowed and subtruncate. Labium 

 scarcely emarginate in front, and with the median sulcus scarcely apparent. Dorsum, 

 as well as the belly, with a central dark stripe, that on the lower surface much nar- 

 rower but more distinct than the other. Scuto-episcutal sutures not very distinct. 

 This species resembles M. punctifrons, but besides the difference in the teeth the head 

 does not agree with Mr. Newport's figure, nor does he make any mention of the 



