334 Mr. R. V. Chamberlin on new 



Length of type near 35 mm. 



Locality .— Bua-Kraeng, 5000 ft. (Fruhstorfer, Feb. 1896). 

 Three specimens, U.S. National Museum. 



Mecistocephalus rnonticolens, sp. n. 

 (PI. XII. figs. 7-11.) 



Dorsum light or fulvous brown with some darker mar- 

 bling. Legs fulvous. Head and prehensorial segment 

 chestnut. 



Head of the usual general shape, but more strongly- 

 narrowed over posterior half than usual. Proportionately 

 long, being 1'8 times longer than the greatest width. 

 Anterior margin obtusely angular, the posterior subtruncate 

 (PI. XII. fig. 7). 



Clypeal region without anterior chitinous, non-areolated 

 spots. Sublateral teeth curving characteristically mesad 

 (PI. XII. fig. 8). 



Median piece of labrum somewhat wedge-shaped, but the 

 sides a little convex and the caudal end notched, projecting 

 beyond lateral pieces. Anterior margins of lateral pieces 

 when extended to meet forming an obtuse angle. Caudal 

 margins concave in outer part, convex in mesal, as shown in 

 PI. XII. figs. 8 & 9. Anterior pieces strongly narrowed 

 mesal. 



In the type the prosternal teeth are present only as 

 exceedingly minute rudiments. The femuroid has the usual 

 two teeth, of which the distal is much the larger, is distally 

 rounded, and is bent distad. The next two joints are armed 

 with rounded teeth, that of the second being the larger. 

 Claw with a rounded nodule above the principal basal 

 prominence or angulation (PI. XII. fig. 10). 



The impressions of the anterior sternites scarcely truly 

 furcate, on some there being no trace of branches, but on 

 others very short branches are discernible, these making 

 a more or less obtuse angle (PI. XII. fig. 11). 



Stemite of pregenital segment strongly narrowed caudad, 

 almost triangular, the posterior end narrowly rounded, con- 

 stricted a little in front of caudal end. Coxopleural pores 

 moderately large in size and comparatively few in number, 

 about twenty on each side in the type. 



Pairs of legs, 49. 



Length of type about 35 mm. 



Locality.— Java: Gede, 9000 ft,, Sept. 1892. U.S. 

 National Museum. 



