THE MYRIAPODA OF NORTH AMERICA. 



223 



P. BIFIDUS. 



1'. rubro castaneus, segmentis ct antioe et postice late fulvo-marginatis, laminia lateralibus dilute fulvis; souto 

 anale triangulare, apice trunoato etdeourvato; appendioibus masoulis, elongatis, pilosis; spina terminale gracil- 

 litna, proxima cylindracea, ultima bifida ct nonnihil abrapte ourvata, spinulo basale gracillimo parvo armata. 



Reddish-chestnut ; segments both anteriorly and posteriorly broadly margined with yellowish ; lateral laminse 

 dilute yellow; anal scutum triangular, its apex truncate and deeurvate ; male appendages elongate, pilose; their 

 terminal spine very slender, proximally cylindrical, distally bifid, and somewhat abruptly curved, armed with a small, 

 very slender basal spine. 



P. niFiDUS, Wood, Proo. Acad. Nat. Soi., 1864, p. 7. 



All of my specimens have been preserved for a length of time in alcohol, so that the 

 description of color is not as accurate as it should be. The anterior Fig. 52. 



aspect of the head is much lighter than the vertex, which is medianly 

 strongly canaliculate. The antennse are dilute fulvous, rather longer 

 than in P. Virginiensis, and distally, sparsely and shortly pilose. The 

 spinules on the distal ends of the first and second joints of the long 

 and slender feet are robust, but are often obsolete anteriorly. The 

 terminal scutum has several punctae closely resembling pores. The 

 preanal scale is triangular ; it has two little elevations surmounted by 

 a punctum. The male appendages (Fig. 52) are elongate. Their terminal spine is very 

 slender and cylindrical in its proximal portion ; distally it is bifid and strongly curved. 

 It is ornamented with a very slender curved basal spinulc. 



I lob. Georgia. Museum of Comp. Zoology. — Dr. Le Conte. Texas. Smithsonian Collection. — G. Wurde- 



P. TRIMACUriATllH. 



P, saturate rubro-brunneus; scutis postice fulvo trimaculatis, corrugatis ; antennis ultimis pilosis; appendioibus 

 masoulis maximis, orassis, ultimis obtuse rotuudatis, spina terminali graoillima, enormiter oonvoluta. (Fig. 58.) 



Deep reddish-brown; scuta posteriorly trimaoulate with yellow, corrugate; antennas distally pilose; male 

 appendages very large, thick, distally obtusely rounded; terminal spine slender, irregularly convolute. 



P. TE1MAOULATUS, Wood, J'roc. Acad. Nat. Soi., 1864, p. 6. 



The color of this species is a dark reddish-brown. Each scutum has on the posterior 



