226 THE MYRIAPODA OF NORTH AMERICA. 



P. floridus (Var. ?). 



P. atro-eastaneus ; scutis postico rubro-aurantiaco marginatis ; laminis lateralibus parvis, laete rubro-anrantiacis ; 

 appendicibus masculis P. placidi illis similibus. 



Blackish-chestnut ; scuto posteriorly marginatc with reddish orange ; lateral laminae small, bright reddish 

 orange; male appendages like those of P. placidus. 



P. floridus (Var. ?), Wood, Proc. Acad. Nat. Sci., 1864, p. 9. 



The head is lighter colored than the body. It is medianly canaliculate, with a pair of 

 punctations on each side of its vertex. Its inferior border is broadly emarginate. The 

 antenna? are rather long and slender, very slightly clavate, light-brown, and distally tipped 

 with black. The scuta are smooth, beautifully polished, and not corrugate. The side 

 plates are distant, quite small, and nearly horizontal, with their anterior angles rounded. 

 The- anal scutum is prolonged, and is sometimes wholly, sometimes partially, orange. It 

 is triangular, with its truncate, decurvate, slightly emarginate apex projecting much 

 beyond the anal scales. The feet are cylindrical, yellow, and somewhat pilose. The male 

 appendages resemble those of P. placidus, except in color. They are yellowish. Those 

 of the female consist of a pair of short, blunt processes. Each of these has a basal portion 

 into which is set a short, somewhat flattened body, with an obscure linear opening tra- 

 versing its distal surface. From the junction of these two parts springs a heavy fringe of 

 long, coarse hair. P. floridus is very possibly a distinct species from P. placidus. I have 

 seen but a single individual of the latter. The general appearance of the two is so dis- 

 similar as to incline me to the belief of their distinctness ; but they agree well as to their 

 genitalia, and a suite of specimens might show their identity. Length, 11 inches. 



Hab. .Michigan.— Prof. Miles. 



1'. IIayhf.ni ANUS. 



I', olivaceo-castaneus ; antennis modieis, sparse pilosis, ultimis nigris ; laminis lateralibus luteis; appendicibus 

 masculis hirsutis et processu lato breve et spinis duabus armatis; spina terminate (Fig. 57), modice robusta, valdc 

 curvata. 



Olive-chestnut ; antennae moderate, sparsely pilose, distally black ; lateral lamina' yellowish ; male appendages 

 hirsute, armed with a broad, short process and two spines; terminal spine moderately robust, strongly curved. 



P. Haydenianus, Wood, Proc. ^.cad. Nat. Sci., 1864, p. 10. 



Judging from an alcoholic specimen, the color of this animal is an olive-chestnut, with 

 the side plates yellowish, and the posterior portions of the scuta much lighter than the 



