M ON THE CHILOPODA OF NORTH AMERICA. 



Since GeopMlus carpophagus is the type of the original genus as instituted by Dr. 

 Leach, the name Geophilus must be used for this section, to which G. carpophagus 

 belongs, and not for that to which Mr. Newport applies it. Mr. Gervais does not 

 adopt any of these genera, much to our surprise, for they appear to us as clearly and 

 even beautifully defined as almost any that we have ever seen in any department of 

 nature. 



G. cephalicus, n. sp. — G. antice obscure aurantiacus, postice saturate olivaceus; capite magno, latis- 

 simo, saturate aurantiaco ; segmento cephalico antice haud emarginato, sparse inordinate punctato, 

 niarginibus lateralibus arcuatis ; antennis modice longis, valde pilosis; labio sparse inordinate punctato, 

 medio canaliculate, antice emargiuato; pedibus longis, flavescentibus, pilosis, utrinque 48; suturis 

 scuto-episcutalibus conspicuis ; superficie ventrali, antice aurantiaca, postice saturate olivacea; sternis 

 suturis sterno-episternalibus et depressione ruediana impressis. 



The body is very wide, as is also the head ; the prebasilar segment of the latter is 

 very strongly widened posteriorly. The mandibles have on the inner side one or two 

 excessively minute denticulations. The anterior portion of the body is a dilute 

 orange, but a short distance from the head a dark stripe commences, which, gradually 

 widening, soon involves the whole surface in a very dark olive tint. The scuta are un- 

 even and variously wrinkled. This form differs from the following in having the head 

 very much broader, and the cephalic segment not emarginate anteriorly ; the labium 

 much more deeply canaliculate, and the number of segments not so great. Still it is 

 possible that the differences are only sexual, and having but one specimen of each, we 

 cannot decide this point. The creature was caught in this neighborhood by my friend 

 Dr. Horn. We append a description of what may be the female of this species. 



G. ? — ('[.saturate aurantiacus, rubustus, politus ; capite parvo, segmento cephalico parvo, antice 



leviter emarginato, niarginibus lateralibus rotundatis ; antennis modice longis, postice pilosis, antice 

 fere pubescentibus ; maudibulis parvis, indistinctissime tridentatis; labio medio leviter canaliculate, 

 antice leviter emarginato, sparse subprofunde punctato ; pedibus brevibus, sparsissime pilosis, utrinque 

 51. 



Sterno-episternal sutures well marked, but not as deeply as the scuto-episcutal. 

 Surface of the most of the scuta quite uneven, sometimes almost coarsely rugose. 

 Dorsum with a very indistinct dark median stripe, more apparent on the posterior 

 portion. 



Specimen belonging to the Smithsonian Institution. 

 27 | 1 | Cumberland, Md. | ? | ? | Unc. 1? | 



G. LiEVis, n. sp. — G aurantiacus, modice robustus; linea mediana dorsali, duplici, nigra, passim obsoleta, 

 ad segmentum penultimum ducta; capite modice magno, leviter punctato, segmento basali breve; an- 

 tennis sparse pilosis ; labio saturate aurantiaco, leviter convexo, sparse leviter punctato, medio valde cana- 

 liculate, antice emarginato; maudibulis haud denticulatis ; suturis scuto-episcutalibus modice distinctis ; 

 pedibus utrinque 53 ; superficie ventrali linea mediana unica, obsoleta, nigra; sternis suturis ct depres- 

 sione mcdiano impressis. 



