30 Myriapoda of West Africa. 



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area near the anterior portion of the lateral margin, also one stout bristle near 

 the anterior-interior corner. 



Lingual laminae beset with bristles on the posterior third, and three large 

 ones near the anterior end. 



First segment finely punctate, the anterior angles slightly produced in male, 

 not produced in female, rounded, with five curved, and occasionally irregular 

 or branched sulcations, the upper one beginning opposite the eye. 



Segments subsequent to the first with about ten occasionally branched stria- 

 tions on the anterior portion, and just in front of each striation a row of sharp 

 conical protuberances which are usually distant from each other by a space 

 greater than that between the striations ; posterior portion of segments with 

 very numerous punctations and irregular longitudinal ridges, the posterior 

 edge depressed ; the longitudinal striations of the sides begin on the anterior 

 segments above the pores, on the posterior segments below them. 



Repugnatorial pores oval, located at about the middle of the side, not remote 

 from the suture, which is sinuate in front of them. 



Last segment rugulose above posteriorly, and witli the posterior portion 

 depressed; mucro not equalling the anal valves, obtuse, rounded. 



Anal valves finely punctate, wrinkled in the depressed portions, rather 

 prominently compressed-margined. 



Pre-anal scale broad, rounded-triangular, considerably exceeded by the 

 anal valves. 



First pair of legs of male with the large sternum hirsute with short bristles 

 on its lateral expansions ; coxae with a large, triangular, dorsally directed 

 process on the upper side. 



Third and subsequent legs of male with a large, pointed, transparent, chitin- 

 ous process rising from the ventral edge of the distal third of tlie two penulti- 

 mate joints, much smaller on posterior legs. 



Genitalia of male — see plate II, figs. 13, 14. 



Color of alcoholic specimeus dark brown, the labrum in some cases black, 

 anterior portion of segments pale blulf ; feet and antennse dull reddish-brown. 



Length 95-110 mm. ; greatest diameter 8-10 mm. ; 52-56 segments. 



Habitat. — Four males and four females are labeled, "St. Paul de 

 Loanda, Dec. 13, 1889" (No. 292); one female " Loanda" (Ac. 

 23,400); one female "Congo, Dec. 25." 



This species is instructive as giving light on the subject of varia- 

 tion in the genus. We have combined in our description characters 

 supposed by some writers to be of great importance, such as the 

 presence or absence of labral teeth, being compelled to this course 

 by the fact that while the extremes of variation are very distinct, 

 the intervening stages are present, and that great deviation from 

 the usual form may exist in respect to some one character without 

 being accompanied by any other noticeable differences. 



