294 MR. E. I. POCOCK OK THE ARACHNIDA A]S"D MTEIOPODA 



The two a(!lnlt examples from Hadramaut agree in colouring 

 exactly with Simon's dimidiatus ; but the three examples from 

 Perim that I have seen differ in having the crests on the legs and 

 palpi, and also the hands in part, blackish. 



Ettthtts anthracinfs, sp. n. (PI. TX. figs. 1, 1 a.) 

 Colour of the upper side of the trunk and of the entire tail 

 blackish green, like that of OrthocMrus melanurus and Prionurus 

 hicolor; legs of the 1st pair yellow, the remaining pairs with 

 the three distal segments yellow, the rest strongly or only slightly 

 infuscate ; mandibles infuscate distally ; chelae mostly pale yellow, 

 but slightly infuscate at the junction of the hand and digits, the 

 crests also on the humerus and brachium sometimes rather 

 strongly infuscate ; lower surface of cephalothorax and abdomen 

 pale or ferruginous. 



Trunk rather coarsely granular above ; the keels on the carapace 

 not strongly defined, the anterior ones breaking up into granules 

 long before reaching the front border ; the ocular tubercle smooth ; 

 the eyes rather widely separated ; tlie intermediate and posterior 

 median keels forming an irregular granular crest; carapace a 

 little longer than the 1st caudal segment, + half the 2nd. 



Terga coarsely granular in the posterior half, nearly smooth 

 between the keels ; the three keels distinct, but short ; the lateral 

 ones not apparent upon the 1st and 2nd terga ; the crests on the 

 7tli well developed, forming almost a complete loop. 



^^(?r««; smooth, with finely denticulate posterior border; the 

 last with four smooth conspicuous keels. 



'Hail about five times as long as the carapace, robust, but with 

 the 1st segment wider than the 5th ; all the normal keels well 

 developed and finely granular, tlie inferior ones, however, on the 

 1st nearly smooth ; the median lateral well developed on the 2nd 

 and 3rd segments, and visible on the 4th, the intercarinal spaces 

 granular ; upper surface of tail smooth, rather strongly excavated, 

 upper angles of 5th not sharp ; vesicle large, globular, angled 

 beneath the aculeus, coarsely punctured. 



ChelcB smooth ; crests on humei'us granular, on brachium 

 smooth, but well developed; none on manus, which is a little 

 wider than the brachium ; hand-back nearly two-thirds the length 

 of the movable digit, which is furnished with about 9 median 

 rows of teeth, the large teeth of the internal series nearly opposite 

 tlie middle of the space that separates those of the external series. 



