Chilopods of tlie (jenus Mecistocepluilus. 329 



First legs exceptionally smallj the second being two and 

 two-thirds longer. 



Impressions of anterior sternites furcate, the angle be- 

 tween branches obtuoe^ becoming more so in going caudad, 

 the two branches in some forming nearly a straight line, 

 disappearing in posterior region as usual [cf. Fl. IX. 

 figs. 8 & 9). 



Pregeuital segment with sternite somewhat shield-shaped, 

 narrowed in front of caudal end. Ooxopleurse with 

 numerous small pores uniformly arranged, less numerous 

 minute ones intervening. Last legs about two and a fourth 

 times as long as the penult ones. 



Number of segments^ 49. 



Lcngtb, to 60 mm. ; width of first tergite 3 mm. 



Locality.— Celebes : Bua-Kraeng, 5000 ft. {Fr'dhstorfer, 

 Feb. 1896). Type and paratypes in U.S. National Museum; 

 paratypes also in Mus. Comp. Zool. at Cambridge, Mass. 



Mecistocephahis philippiaus, sp. n. 

 (1^1. IX. fig. 11 : PI. X. figs. 1-8.) 



Colour brown, darkened by a dense network or marbling 

 of black, which is also evident in tiie jjleural region and less 

 pronouncedly on the sternites. Head with antenniB and 

 prehensorial segment chestnut. Legs fulvous. 



Head proportionately broader than in celebensis and cepjiu- 

 lutes, being 1"6 times longer than wide. The anterior 

 margin is weakly bowed forward, less nearly truncate than 

 in celebensis and less produced than in ceplialotes. The sub- 

 lateral teeth or s[)urs are farther forward than usual (PI. X. 

 fig. 1). 



i^ntenme strongly attenuated, the articles propoj'tionately 

 rather broad, the sivth being typically as broad distally as 

 the length. Ultimate article decidedly longer than the 

 preceding one. 



Exposed portion of median piece of lubrum conspicuously 

 narrowed caudad. Free nuirgin of each lateral piece 

 straighter than in celebensis and cephalotes, not bending in 

 at mesal ends, as in the latter species, and with no line of 

 haiis showing at outer ends. 



Mandible with thirteen or fourteen primary lamellae. 

 First lamella with seven stout and snbuniform teeth. Mesal 

 margin of mandible below this lamella with only three to 

 five weak r.errations below the angle (PI. X. fig. 4). A 

 median lamella has the teeth of the distal region long and 

 slender, those of proximal half much reduced, though rather 



