36 T. V. HO DC SON. 



joint has throe rows of spines ahDug its centre, its extremity is truncated and carries 

 the very small pointed terminal joint. 



The aliove description is taken from a rather small male. The female difters 

 considerably in the anterior part of the Itody. This, as is usual with all niemliers of the 

 genus, is considerahly swollen, a fact which of course involves the proportions of these 

 sefTraent«. The spinous armature of the body is much more strongly developed, the 

 small spines are rather larger and much more numerous ; the first segment of the 

 mesosome has a pair of dorso-lateral spines which are conspicuously larger than the 

 rest, ami on the second segment there is one smaller than on the first, on the third 

 seoTnent also, and that not very much larger than the surrounding ones. 



The cpimeral spines are generally more developed, and at the base of the fourth 

 pair of appendages there is a stout spine directed to the mid-ventral line. This is 

 not present in tlu- male, and is apparently a secondary support to the brood pouch, 

 which is composeil of four pairs of oostegites. 



Tlie first antenna is of normal type. The first joint is stout, with a blade-like 

 expansion along its inner margin. This is covered with minute stiH" setae. The second 

 joint is not so long and .slightly swollen towards the distal extremity, the third is sub- 

 equal in length and cylindrical, and the fiagellum, which carries some sixteen tufts of 

 specialised setse, is rather longer than the two preceding joints together. 



The second antenna has, as usual, the two first joints extremely .short, the 

 proportions of the remainder with the fiagellum are 4. 8. 10. 8. The third joint has a 

 series of stout spines along its outer border and long .setfe on the inner ventral border; 

 the next joint is similarly provided, but here the spines are smaller and diminish to 

 nothing during its proximal half. The last joint, a fiagellum, bears small sct:T3, but 

 these arc not thickly distrilmted. 



The mandible is massive and thickly pigmented with arbore.scent chromatophores. 

 About half its length it is l)ent at a right angle. Its anterior margin is prolonged as a 

 toothed edge ; it bears two teeth, and passing obliquely backwards from the most 

 anterior of these are two quite small ones ; the posterior edge of this part is another 

 very prominent tooth, and below this again is a group of spines arranged somewhat 

 radially. The cutting edge is straight and liroad. 



The first maxilla comprises two lobes, the inner one, short and slender, slightly 

 curved with fine seta3 along its inner margin ; its truncated extremity bears three stout 

 spinous seta5 with fine ones along them, rendering them coarsely plumose. The outer 

 joint is stouter, double the length, with fine seta; externally and terminates in a crown 

 of nine or ten stout spines. 



The second maxilla has its inner lolic sliort and broad, with tine .sotaj along its 

 internal margin. Distally the extremity is rather rounded and armed with plumose 

 spines. Tliree of these plumose spines on the outer side of this lobe arc much finer 

 than the others. Of the two hjbes the inner one is the smaller and terminates with 

 three long slightly plumose .spines. The outer lobe is nuich stouter and carries five of 



