456 Annals of the South African Museum. 



between Zeekoe Vlei and Eetreat Station, Cape Flats (March, 1900) 

 (Eeg. No. 9039). 



As no ^ was obtained, I do not feel absolutely sure that the 

 species is G. coccineus (Koch), but I have not found as yet any 

 important differences in the ? . The species is neio to the fauna 

 of Africa. 



11. CURVIPES TRIDENS ? , n. Sp. 



Plate XIX., figs. 27-30. 



This new species is closely related to C. coccineus (Koch, 1836) 

 (7), C. stjordalensis Sig Thor, 1897 (25), and C. controversiosus 

 Piersig, 1897 (24), but it exhibits some characteristics which mark 

 it as a new species. 



Maxillary Organs. — The 2^alps (fig. 27) have the typical Curcvpes 

 structure. The fourth segment has 3 large hair-processes or papillae 

 in addition to the usual chitinous process (different from G. coccineus 

 (Koch) and G. controversiosus Piersig), and has small hair-pores at 

 the distal end. The fifth segment terminates, as usual, with 3 small 

 chitinous processes or claws. For the structure of the mandibles 

 see fig. 28. 



The epimeral area, is congested, but of the usual structure (fig. 29). 



The genital area (figs. 29 and 30) resembles that of the described 

 allied species, especially G. coccineus Koch, and G. stjordalensis 

 Sig Thor (31), in having tivo pairs of smaller hair-pores at the 

 middle of the genital valves in front of the disc-plates. The latter 

 differ from those of the 2 species just mentioned, being smaller and 

 having a smaller number of discs {acetabidce), viz., 12-15. From 

 C. controversiosus Piersig, this species also differs in having the 

 2 pah's of small hair-pores at the middle of the genital valves. 



The "anus" is situated near to the genital area, and is surrounded 

 by a thick, chitinous, annular wall (fig. 30). 



The skin is thin, with very fine lines, as in most of the species of 

 the genus. 



Locality. — Mr. Purcell collected 2 $ in a fresh-water pond near 

 Eetreat Vlei, Cape Plats (Oct., 1900) (Eeg. No. 4633). 



VII. Family ATACIDiE Sig Thor, 1900 (30). 



VIII. Gen. ATAX (Duges) Bruzelius, 1854 (9). 



12. Atax ceassipes (Miiller, 1776) (1, 2). 

 Locality. — Mr. Purcell collected a few nymphs in fresh- water 



