62 Annals of the South African Museum. 



unoccupied a small down-bent frontal space. The last two seg- 

 ments of the person are the shortest. The small first side-plates 

 are all but completely concealed by the large second pair, which are 

 horizontally ovoid with almost vertically truncate hind margin ; the 

 third are much shorter, but nearly as deep, subquadrate ; the fourth 

 similar to the third, with more rounded outline, and faintly 

 emarginate behind. These are much at variance with the corre- 

 sponding parts as figured by the authors named in the generic 

 discussion. The fifth and sixth side-plates are bilobed. The postero- 

 lateral angles of the third pleon segment are minutely dentate, with 

 sinuous outline above the denticle. The fourth segment has a deep 

 dorsal depression ; the fifth is much shorter than the fourth or the 

 sixth. 



The first antennae have a short stout peduncle, not longer than 

 the long and broad first joint of the flagellum, which is thickly 

 fringed with filaments and followed by ten slender joints, together 

 scarcely as long as the accessory flagellum. This is scarcely shorter 

 than the first joint of the primary, and is composed of one long laminar 

 joint followed by a short linear one and a minute apical joint ; in 

 comparison with the primary flagellum it is much larger than that 

 figured by Delia Valle for G. nicceensis. 



The second antennae have the first three joints of the peduncle 

 short, the fourth rather longer than any of them, but less than half 

 as long as the slender fifth ; the twenty-five jointed flagellum is 

 scarcely as long as the peduncle. 



The upper lip and the forward lobes of the lower lip are apically 

 narrow, but below the apices they show considerable breadth when 

 flattened out. 



The mandibles in the rear part of the trunk afford a substantial 

 base for the very large palp, but the front part of the trunk is feebly 

 laminar, with truncate cutting edge and a microscopically tridentate 

 accessory plate. Whether in the female the cutting edge becomes 

 narrower remains to be seen. The second joint of the palp carries 

 twenty-one long spines, and the rather shorter third joint twelve 

 that are shorter, serrate, and more widely spaced. But these 

 numbers are not constant, since in the smaller specimen examined 

 they were respectively thirteen and seven. 



The first maxillae have been already described. It may be added 

 that the outer plate is slightly contracted a little below the apex, and 

 what I have suggested in the generic discussion as a possibility 

 seems to be here clearly the case in regard to the palp. The smaller 

 specimen shows a one-jointed palp surmounted by a single seta ; the 



