198 



THE MYRIAPODA OF NORTH AMERICA. 



lete, a transverse scries of longitudinal, abbreviated, obsolete, impressed lines; and beneath 

 the stigmata with impressed, more distinct ones, ultimate segment mucronate, spiracles 

 not prominent ; eyes rather large, conspicuous, black ; labrum yellowish white ; antenna; 

 brownish." 



" A common species inhabiting under stones, and in humid situations ; a variety occurs 

 with a very distinct, acute, longitudinal, dorsal line, and variegated head." 



I. MLOSISCUTA. 



I. castaneo-brunncus maculae nigrne (intordum obsoletae) scriobus lateralibus ornatus ; antennis longe pubesccn- 

 tibus ; capitis marginc antico modico eraarginato, denticulato; segmentis 58 ; mucrono parvissimo ; scutis pilosis, 

 singulo punctorum disjunctorum serie impresso. 



Chestnut brown, ornamented with a lateral series of black dots (sometimes obsolete) ; antennas pubescent ; ante- 

 rior margin of the head moderately emargirlatc, denticulate; segments 58; muero very small; scuta pilose, each 

 impressed with a series of distant dots. 



I. tilosiscuta, Wood, Proc. Acad. Nat. Sci., 1864, p. 11. 



The color of this species is a chestnut brown, sometimes mottled with light brown. The 

 anterior aspect is beautifully but irregularly areolated with the latter color. The antenna? 

 are moderately long, and have their dark joints tipped with white. There is a pair of 

 coarse punctations on the vertex. Each scutum has a series of distinct punctations ex- 

 tending entirely around it ; from these dots proceed little channels, obsolete on the fore- 

 part of the body, but gradually becoming strongly pronounced. The anterior portion of 

 the body is sparsely, but the posterior densely, pilose. The anal scales are very rough. I 

 have never seen* a male, neither can I give a detailed account of the female appendages, 

 but one portion of them consists of a pair of short, subcylindrical, rather robust and dis- 

 tally clavate processes. 



Hub. Susquehanna County, Pennsylvania. — E. D. Cope, Esq. 



I. EXiauus. 



Corporis segmenta cum anali 31 ad 33. Pedum paria 51 ad 55. Oculi subrotundi. Antenna; pilosa), sub- 

 breves, articulis apicalibus approximates, subincrassatis, quoad colorem fuseo nigricantes, articulorum apicibus 

 albidis. Cinguli primi supra cpunctati processus lateralis trigonus, modice acutus, subelongatus, apice incurvato, 

 striis aliquot imprcssis notato, abdomen attingens. Segmenta reliqua dorsalia parte posteriory subtumida, eonvexa, 

 quarc corpus submoniliforme, striis subremotiusculis, grossiusoulis, in dorso subobsolctis, in lateribus distinctis 

 impressa. Penultimum cingulum satis insigne, in posterioris marginis medio breviter mueronaturn, mucronis 

 apice pallide brunneo, anum vix superanto. Valvulnc analos laterales pilosaj. Squama analis inferior triangularis 

 postice mucronata. Caput nigrum, antiec fuscescens, margine labiali flavicante-albido. Labium inferius f'uscescens, 

 margine anteriore flavicante-albido. Corpus totum fusco-nigrum, nitidum, abdomine pallidiore. In dorso medio, 



. I 



